Android Notes for Professionals (GoalKicker.com) (Z-Library)

Page 1

Android Notes for ProfessionalsAndroid™ Notes for Professionals GoalKicker.com Free Programming Books Disclaimer This is an unocial free book created for educational purposes and is not aliated with ocial Android™ group(s) or company(s). All trademarks and registered trademarks are the property of their respective owners 1000+ pages of professional hints and tricks

Page 2

Contents About 1 ................................................................................................................................................................................... Chapter 1: Getting started with Android 2 ........................................................................................................... Section 1.1: Creating a New Project 2 .............................................................................................................................. Section 1.2: Setting up Android Studio 13 ....................................................................................................................... Section 1.3: Android programming without an IDE 14 .................................................................................................. Section 1.4: Application Fundamentals 18 ...................................................................................................................... Section 1.5: Setting up an AVD (Android Virtual Device) 19 ......................................................................................... Chapter 2: Layouts 23 ..................................................................................................................................................... Section 2.1: LayoutParams 23 ......................................................................................................................................... Section 2.2: Gravity and layout gravity 26 .................................................................................................................... Section 2.3: CoordinatorLayout Scrolling Behavior 28 ................................................................................................. Section 2.4: Percent Layouts 30 ...................................................................................................................................... Section 2.5: View Weight 31 ............................................................................................................................................ Section 2.6: Creating LinearLayout programmatically 32 ........................................................................................... Section 2.7: LinearLayout 33 ........................................................................................................................................... Section 2.8: RelativeLayout 34 ........................................................................................................................................ Section 2.9: FrameLayout 36 .......................................................................................................................................... Section 2.10: GridLayout 37 ............................................................................................................................................. Section 2.11: CoordinatorLayout 39 ................................................................................................................................. Chapter 3: Gradle for Android 41 ............................................................................................................................. Section 3.1: A basic build.gradle file 41 ........................................................................................................................... Section 3.2: Define and use Build Configuration Fields 43 ........................................................................................... Section 3.3: Centralizing dependencies via "dependencies.gradle" file 46 ................................................................. Section 3.4: Sign APK without exposing keystore password 47 .................................................................................. Section 3.5: Adding product flavor-specific dependencies 49 ..................................................................................... Section 3.6: Specifying dierent application IDs for build types and product flavors 49 ......................................... Section 3.7: Versioning your builds via "version.properties" file 50 ............................................................................. Section 3.8: Defining product flavors 51 ........................................................................................................................ Section 3.9: Changing output apk name and add version name: 51 .......................................................................... Section 3.10: Adding product flavor-specific resources 52 .......................................................................................... Section 3.11: Why are there two build.gradle files in an Android Studio project? 52 ................................................. Section 3.12: Directory structure for flavor-specific resources 53 ............................................................................... Section 3.13: Enable Proguard using gradle 53 ............................................................................................................. Section 3.14: Ignoring build variant 54 ............................................................................................................................ Section 3.15: Enable experimental NDK plugin support for Gradle and AndroidStudio 54 ....................................... Section 3.16: Display signing information 56 ................................................................................................................. Section 3.17: Seeing dependency tree 57 ....................................................................................................................... Section 3.18: Disable image compression for a smaller APK file size 58 .................................................................... Section 3.19: Delete "unaligned" apk automatically 58 ................................................................................................ Section 3.20: Executing a shell script from gradle 58 ................................................................................................... Section 3.21: Show all gradle project tasks 59 ............................................................................................................... Section 3.22: Debugging your Gradle errors 60 ............................................................................................................ Section 3.23: Use gradle.properties for central versionnumber/buildconfigurations 61 ......................................... Section 3.24: Defining build types 62 .............................................................................................................................. Chapter 4: RecyclerView onClickListeners 63 .................................................................................................... Section 4.1: Kotlin and RxJava example 63 ................................................................................................................... Section 4.2: RecyclerView Click listener 64 ....................................................................................................................

Page 3

Section 4.3: Another way to implement Item Click Listener 65 ................................................................................... Section 4.4: New Example 67 .......................................................................................................................................... Section 4.5: Easy OnLongClick and OnClick Example 68 ............................................................................................. Section 4.6: Item Click Listeners 71 ................................................................................................................................. Chapter 5: NavigationView 73 .................................................................................................................................... Section 5.1: How to add the NavigationView 73 ............................................................................................................ Section 5.2: Add underline in menu elements 77 .......................................................................................................... Section 5.3: Add seperators to menu 78 ........................................................................................................................ Section 5.4: Add menu Divider using default DividerItemDecoration 79 ................................................................... Chapter 6: Intent 81 ......................................................................................................................................................... Section 6.1: Getting a result from another Activity 81 ................................................................................................... Section 6.2: Passing data between activities 83 ............................................................................................................ Section 6.3: Open a URL in a browser 84 ....................................................................................................................... Section 6.4: Starter Pattern 85 ........................................................................................................................................ Section 6.5: Clearing an activity stack 86 ...................................................................................................................... Section 6.6: Start an activity 86 ....................................................................................................................................... Section 6.7: Sending emails 87 ........................................................................................................................................ Section 6.8: CustomTabsIntent for Chrome Custom Tabs 87 ..................................................................................... Section 6.9: Intent URI 88 ................................................................................................................................................. Section 6.10: Start the dialer 89 ....................................................................................................................................... Section 6.11: Broadcasting Messages to Other Components 89 .................................................................................. Section 6.12: Passing custom object between activities 90 .......................................................................................... Section 6.13: Open Google map with specified latitude, longitude 92 ......................................................................... Section 6.14: Passing dierent data through Intent in Activity 92 ............................................................................... Section 6.15: Share intent 94 ............................................................................................................................................ Section 6.16: Showing a File Chooser and Reading the Result 94 ............................................................................... Section 6.17: Sharing Multiple Files through Intent 96 ................................................................................................... Section 6.18: Start Unbound Service using an Intent 96 ............................................................................................... Section 6.19: Getting a result from Activity to Fragment 97 ........................................................................................ Chapter 7: JSON in Android with org.json 99 ..................................................................................................... Section 7.1: Creating a simple JSON object 99 .............................................................................................................. Section 7.2: Create a JSON String with null value 99 ................................................................................................... Section 7.3: Add JSONArray to JSONObject 99 ............................................................................................................ Section 7.4: Parse simple JSON object 100 ................................................................................................................... Section 7.5: Check for the existence of fields on JSON 101 ......................................................................................... Section 7.6: Create nested JSON object 101 ................................................................................................................. Section 7.7: Updating the elements in the JSON 102 ................................................................................................... Section 7.8: Using JsonReader to read JSON from a stream 102 ............................................................................. Section 7.9: Working with null-string when parsing json 104 ...................................................................................... Section 7.10: Handling dynamic key for JSON response 105 ...................................................................................... Chapter 8: Android Studio 107 ................................................................................................................................... Section 8.1: Setup Android Studio 107 ............................................................................................................................ Section 8.2: View And Add Shortcuts in Android Studio 107 ........................................................................................ Section 8.3: Android Studio useful shortcuts 108 .......................................................................................................... Section 8.4: Android Studio Improve performance tip 109 .......................................................................................... Section 8.5: Gradle build project takes forever 110 ...................................................................................................... Section 8.6: Enable/Disable blank line copy 110 .......................................................................................................... Section 8.7: Custom colors of logcat message based on message importance 111 ............................................... Section 8.8: Filter logs from UI 112 ................................................................................................................................. Section 8.9: Create filters configuration 113 .................................................................................................................

Page 4

Section 8.10: Create assets folder 114 ........................................................................................................................... Chapter 9: Resources 116 ............................................................................................................................................. Section 9.1: Define colors 116 .......................................................................................................................................... Section 9.2: Color Transparency(Alpha) Level 117 ...................................................................................................... Section 9.3: Define String Plurals 117 ............................................................................................................................. Section 9.4: Define strings 118 ........................................................................................................................................ Section 9.5: Define dimensions 119 ................................................................................................................................ Section 9.6: String formatting in strings.xml 119 ........................................................................................................... Section 9.7: Define integer array 120 ............................................................................................................................. Section 9.8: Define a color state list 120 ........................................................................................................................ Section 9.9: 9 Patches 121 ............................................................................................................................................... Section 9.10: Getting resources without "deprecated" warnings 124 ......................................................................... Section 9.11: Working with strings.xml file 124 ............................................................................................................... Section 9.12: Define string array 125 .............................................................................................................................. Section 9.13: Define integers 126 .................................................................................................................................... Section 9.14: Define a menu resource and use it inside Activity/Fragment 126 ....................................................... Chapter 10: Data Binding Library 128 ..................................................................................................................... Section 10.1: Basic text field binding 128 ........................................................................................................................ Section 10.2: Built-in two-way Data Binding 129 ........................................................................................................... Section 10.3: Custom event using lambda expression 130 .......................................................................................... Section 10.4: Default value in Data Binding 132 ............................................................................................................ Section 10.5: Databinding in Dialog 132 ......................................................................................................................... Section 10.6: Binding with an accessor method 132 ..................................................................................................... Section 10.7: Pass widget as reference in BindingAdapter 133 ................................................................................... Section 10.8: Click listener with Binding 134 ................................................................................................................... Section 10.9: Data binding in RecyclerView Adapter 135 ............................................................................................. Section 10.10: Databinding in Fragment 136 ................................................................................................................. Section 10.11: DataBinding with custom variables(int,boolean) 137 ............................................................................ Section 10.12: Referencing classes 137 ........................................................................................................................... Chapter 11: Exceptions 139 ............................................................................................................................................ Section 11.1: ActivityNotFoundException 139 .................................................................................................................. Section 11.2: OutOfMemoryError 139 .............................................................................................................................. Section 11.3: Registering own Handler for unexpected exceptions 139 ...................................................................... Section 11.4: UncaughtException 141 .............................................................................................................................. Section 11.5: NetworkOnMainThreadException 141 ...................................................................................................... Section 11.6: DexException 143 ........................................................................................................................................ Chapter 12: Getting Calculated View Dimensions 144 .................................................................................... Section 12.1: Calculating initial View dimensions in an Activity 144 ............................................................................. Chapter 13: AsyncTask 145 ........................................................................................................................................... Section 13.1: Basic Usage 145 .......................................................................................................................................... Section 13.2: Pass Activity as WeakReference to avoid memory leaks 147 .............................................................. Section 13.3: Download Image using AsyncTask in Android 148 ................................................................................ Section 13.4: Canceling AsyncTask 151 .......................................................................................................................... Section 13.5: AsyncTask: Serial Execution and Parallel Execution of Task 151 .......................................................... Section 13.6: Order of execution 154 .............................................................................................................................. Section 13.7: Publishing progress 154 ............................................................................................................................. Chapter 14: SharedPreferences 156 ........................................................................................................................ Section 14.1: Implementing a Settings screen using SharedPreferences 156 ............................................................. Section 14.2: Commit vs. Apply 158 ................................................................................................................................ Section 14.3: Read and write values to SharedPreferences 158 ..................................................................................

Page 5

Section 14.4: Retrieve all stored entries from a particular SharedPreferences file 159 ............................................ Section 14.5: Reading and writing data to SharedPreferences with Singleton 160 ................................................... Section 14.6: getPreferences(int) VS getSharedPreferences(String, int) 164 ............................................................. Section 14.7: Listening for SharedPreferences changes 164 ....................................................................................... Section 14.8: Store, Retrieve, Remove and Clear Data from SharedPreferences 165 .............................................. Section 14.9: Add filter for EditTextPreference 165 ....................................................................................................... Section 14.10: Supported data types in SharedPreferences 166 ................................................................................. Section 14.11: Dierent ways of instantiating an object of SharedPreferences 166 .................................................. Section 14.12: Removing keys 167 ................................................................................................................................... Section 14.13: Support pre-Honeycomb with StringSet 167 ......................................................................................... Chapter 15: Emulator 169 .............................................................................................................................................. Section 15.1: Taking screenshots 169 .............................................................................................................................. Section 15.2: Simulate call 174 ......................................................................................................................................... Section 15.3: Open the AVD Manager 174 ..................................................................................................................... Section 15.4: Resolving Errors while starting emulator 174 ......................................................................................... Chapter 16: Material Design 176 ................................................................................................................................ Section 16.1: Adding a Toolbar 176 ................................................................................................................................. Section 16.2: Buttons styled with Material Design 177 .................................................................................................. Section 16.3: Adding a FloatingActionButton (FAB) 178 ............................................................................................... Section 16.4: RippleDrawable 179 ................................................................................................................................... Section 16.5: Adding a TabLayout 184 ........................................................................................................................... Section 16.6: Bottom Sheets in Design Support Library 186 ........................................................................................ Section 16.7: Apply an AppCompat theme 189 ............................................................................................................. Section 16.8: Add a Snackbar 190 ................................................................................................................................... Section 16.9: Add a Navigation Drawer 191 ................................................................................................................... Section 16.10: How to use TextInputLayout 194 ............................................................................................................. Chapter 17: Lint Warnings 195 .................................................................................................................................... Section 17.1: Using tools:ignore in xml files 195 ............................................................................................................. Section 17.2: Configure LintOptions with gradle 195 ..................................................................................................... Section 17.3: Configuring lint checking in Java and XML source files 196 .................................................................. Section 17.4: How to configure the lint.xml file 196 ....................................................................................................... Section 17.5: Mark Suppress Warnings 197 ................................................................................................................... Section 17.6: Importing resources without "Deprecated" error 197 ............................................................................ Chapter 18: Service 199 .................................................................................................................................................. Section 18.1: Lifecycle of a Service 199 ........................................................................................................................... Section 18.2: Defining the process of a service 200 ...................................................................................................... Section 18.3: Creating an unbound service 200 ............................................................................................................. Section 18.4: Starting a Service 203 ................................................................................................................................ Section 18.5: Creating Bound Service with help of Binder 203 ..................................................................................... Section 18.6: Creating Remote Service (via AIDL) 204 .................................................................................................. Chapter 19: Storing Files in Internal & External Storage 206 ...................................................................... Section 19.1: Android: Internal and External Storage - Terminology Clarification 206 .............................................. Section 19.2: Using External Storage 210 ....................................................................................................................... Section 19.3: Using Internal Storage 211 ........................................................................................................................ Section 19.4: Fetch Device Directory : 211 ..................................................................................................................... Section 19.5: Save Database on SD Card (Backup DB on SD) 213 ............................................................................. Chapter 20: WebView 215 ............................................................................................................................................. Section 20.1: Troubleshooting WebView by printing console messages or by remote debugging 215 ................. Section 20.2: Communication from Javascript to Java (Android) 216 ...................................................................... Section 20.3: Communication from Java to Javascript 217 .......................................................................................

Page 6

Section 20.4: Open dialer example 217 ......................................................................................................................... Section 20.5: Open Local File / Create dynamic content in Webview 218 ................................................................ Section 20.6: JavaScript alert dialogs in WebView - How to make them work 218 ................................................. Chapter 21: Project SDK versions 220 ..................................................................................................................... Section 21.1: Defining project SDK versions 220 ............................................................................................................ Chapter 22: RecyclerView 221 .................................................................................................................................... Section 22.1: Adding a RecyclerView 221 ....................................................................................................................... Section 22.2: Smoother loading of items 222 ................................................................................................................ Section 22.3: RecyclerView with DataBinding 223 ........................................................................................................ Section 22.4: Animate data change 224 ........................................................................................................................ Section 22.5: Popup menu with recyclerView 228 ........................................................................................................ Section 22.6: Using several ViewHolders with ItemViewType 230 .............................................................................. Section 22.7: Filter items inside RecyclerView with a SearchView 231 ....................................................................... Section 22.8: Drag&Drop and Swipe with RecyclerView 232 ...................................................................................... Section 22.9: Show default view till items load or when data is not available 233 ................................................... Section 22.10: Add header/footer to a RecyclerView 235 ........................................................................................... Section 22.11: Endless Scrolling in Recycleview 238 ...................................................................................................... Section 22.12: Add divider lines to RecyclerView items 238 ......................................................................................... Chapter 23: Google Maps API v2 for Android 241 ............................................................................................. Section 23.1: Custom Google Map Styles 241 ................................................................................................................ Section 23.2: Default Google Map Activity 252 ............................................................................................................. Section 23.3: Show Current Location in a Google Map 253 ......................................................................................... Section 23.4: Change Oset 259 ..................................................................................................................................... Section 23.5: MapView: embedding a GoogleMap in an existing layout 259 ............................................................. Section 23.6: Get debug SHA1 fingerprint 261 ............................................................................................................... Section 23.7: Adding markers to a map 262 ................................................................................................................. Section 23.8: UISettings 262 ............................................................................................................................................ Section 23.9: InfoWindow Click Listener 263 ................................................................................................................. Section 23.10: Obtaining the SH1-Fingerprint of your certificate keystore file 264 ................................................... Section 23.11: Do not launch Google Maps when the map is clicked (lite mode) 265 ............................................... Chapter 24: PorterDu Mode 266 ............................................................................................................................ Section 24.1: Creating a PorterDu ColorFilter 266 ...................................................................................................... Section 24.2: Creating a PorterDu XferMode 266 ...................................................................................................... Section 24.3: Apply a radial mask (vignette) to a bitmap using PorterDuXfermode 266 ..................................... Chapter 25: 9-Patch Images 268 ............................................................................................................................... Section 25.1: Basic rounded corners 268 ....................................................................................................................... Section 25.2: Optional padding lines 268 ....................................................................................................................... Section 25.3: Basic spinner 269 ....................................................................................................................................... Chapter 26: Android NDK 270 ...................................................................................................................................... Section 26.1: How to log in ndk 270 ................................................................................................................................ Section 26.2: Building native executables for Android 270 .......................................................................................... Section 26.3: How to clean the build 271 ....................................................................................................................... Section 26.4: How to use a makefile other than Android.mk 271 ............................................................................... Chapter 27: RecyclerView Decorations 272 ......................................................................................................... Section 27.1: Add divider to RecyclerView 272 .............................................................................................................. Section 27.2: Drawing a Separator 274 ......................................................................................................................... Section 27.3: How to add dividers using and DividerItemDecoration 275 ................................................................. Section 27.4: Per-item margins with ItemDecoration 275 ............................................................................................ Section 27.5: ItemOsetDecoration for GridLayoutManager in RecycleView 276 ...................................................

Page 7

Chapter 28: Camera 2 API 278 .................................................................................................................................... Section 28.1: Preview the main camera in a TextureView 278 ..................................................................................... Chapter 29: ViewPager 287 .......................................................................................................................................... Section 29.1: ViewPager with a dots indicator 287 ........................................................................................................ Section 29.2: Basic ViewPager usage with fragments 289 .......................................................................................... Section 29.3: ViewPager with PreferenceFragment 290 .............................................................................................. Section 29.4: Adding a ViewPager 291 .......................................................................................................................... Section 29.5: Setup OnPageChangeListener 292 .......................................................................................................... Section 29.6: ViewPager with TabLayout 293 ............................................................................................................... Chapter 30: CardView 296 ............................................................................................................................................ Section 30.1: Getting Started with CardView 296 .......................................................................................................... Section 30.2: Adding Ripple animation 297 ................................................................................................................... Section 30.3: Customizing the CardView 297 ................................................................................................................ Section 30.4: Using Images as Background in CardView (Pre-Lollipop device issues) 298 ..................................... Section 30.5: Animate CardView background color with TransitionDrawable 300 ................................................... Chapter 31: HttpURLConnection 301 ....................................................................................................................... Section 31.1: Creating an HttpURLConnection 301 ........................................................................................................ Section 31.2: Sending an HTTP GET request 301 ........................................................................................................... Section 31.3: Reading the body of an HTTP GET request 302 ..................................................................................... Section 31.4: Sending an HTTP POST request with parameters 302 ........................................................................... Section 31.5: A multi-purpose HttpURLConnection class to handle all types of HTTP requests 303 ...................... Section 31.6: Use HttpURLConnection for multipart/form-data 306 .......................................................................... Section 31.7: Upload (POST) file using HttpURLConnection 309 ................................................................................. Chapter 32: SQLite 311 ................................................................................................................................................... Section 32.1: onUpgrade() method 311 .......................................................................................................................... Section 32.2: Reading data from a Cursor 311 ............................................................................................................. Section 32.3: Using the SQLiteOpenHelper class 313 ................................................................................................... Section 32.4: Insert data into database 314 .................................................................................................................. Section 32.5: Bulk insert 314 ............................................................................................................................................ Section 32.6: Create a Contract, Helper and Provider for SQLite in Android 315 ..................................................... Section 32.7: Delete row(s) from the table 319 ............................................................................................................. Section 32.8: Updating a row in a table 320 .................................................................................................................. Section 32.9: Performing a Transaction 320 ................................................................................................................. Section 32.10: Create Database from assets folder 321 .............................................................................................. Section 32.11: Store image into SQLite 323 .................................................................................................................... Section 32.12: Exporting and importing a database 325 .............................................................................................. Chapter 33: ADB (Android Debug Bridge) 327 .................................................................................................... Section 33.1: Connect ADB to a device via WiFi 327 ..................................................................................................... Section 33.2: Direct ADB command to specific device in a multi-device setting 329 ............................................... Section 33.3: Taking a screenshot and video (for kitkat only) from a device display 329 ....................................... Section 33.4: Pull (push) files from (to) the device 330 ................................................................................................ Section 33.5: Print verbose list of connected devices 331 ............................................................................................ Section 33.6: View logcat 331 .......................................................................................................................................... Section 33.7: View and pull cache files of an app 332 .................................................................................................. Section 33.8: Clear application data 332 ....................................................................................................................... Section 33.9: View an app's internal data (data/data/<sample.package.id>) on a device 333 .............................. Section 33.10: Install and run an application 333 .......................................................................................................... Section 33.11: Sending broadcast 333 ............................................................................................................................. Section 33.12: Backup 334 ................................................................................................................................................ Section 33.13: View available devices 335 ......................................................................................................................

Page 8

Section 33.14: Connect device by IP 335 ........................................................................................................................ Section 33.15: Install ADB on Linux system 336 ............................................................................................................. Section 33.16: View activity stack 336 ............................................................................................................................. Section 33.17: Reboot device 336 .................................................................................................................................... Section 33.18: Read device information 337 .................................................................................................................. Section 33.19: List all permissions that require runtime grant from users on Android 6.0 337 ................................ Section 33.20: Turn on/o Wifi 337 ................................................................................................................................ Section 33.21: Start/stop adb 337 ................................................................................................................................... Chapter 34: ButterKnife 338 ........................................................................................................................................ Section 34.1: Configuring ButterKnife in your project 338 ............................................................................................ Section 34.2: Unbinding views in ButterKnife 340 ......................................................................................................... Section 34.3: Binding Listeners using ButterKnife 340 .................................................................................................. Section 34.4: Android Studio ButterKnife Plugin 341 .................................................................................................... Section 34.5: Binding Views using ButterKnife 342 ....................................................................................................... Chapter 35: Supporting Screens With Dierent Resolutions, Sizes 345 ............................................... Section 35.1: Using configuration qualifiers 345 ............................................................................................................ Section 35.2: Converting dp and sp to pixels 345 ......................................................................................................... Section 35.3: Text size and dierent android screen sizes 346 ................................................................................... Chapter 36: Glide 347 ....................................................................................................................................................... Section 36.1: Loading an image 347 ............................................................................................................................... Section 36.2: Add Glide to your project 348 .................................................................................................................. Section 36.3: Glide circle transformation (Load image in a circular ImageView) 348 .............................................. Section 36.4: Default transformations 349 .................................................................................................................... Section 36.5: Glide rounded corners image with custom Glide target 350 ................................................................ Section 36.6: Placeholder and Error handling 350 ........................................................................................................ Section 36.7: Preloading images 351 .............................................................................................................................. Section 36.8: Handling Glide image load failed 351 ..................................................................................................... Section 36.9: Load image in a circular ImageView without custom transformations 352 ....................................... Chapter 37: Retrofit2 353 .............................................................................................................................................. Section 37.1: A Simple GET Request 353 ......................................................................................................................... Section 37.2: Debugging with Stetho 355 ...................................................................................................................... Section 37.3: Add logging to Retrofit2 356 .................................................................................................................... Section 37.4: A simple POST request with GSON 356 ................................................................................................... Section 37.5: Download a file from Server using Retrofit2 358 ................................................................................... Section 37.6: Upload multiple file using Retrofit as multipart 360 .............................................................................. Section 37.7: Retrofit with OkHttp interceptor 363 ........................................................................................................ Section 37.8: Header and Body: an Authentication Example 363 ............................................................................... Section 37.9: Uploading a file via Multipart 364 ............................................................................................................ Section 37.10: Retrofit 2 Custom Xml Converter 364 .................................................................................................... Section 37.11: Reading XML form URL with Retrofit 2 366 ............................................................................................ Chapter 38: Dialog 369 ................................................................................................................................................... Section 38.1: Adding Material Design AlertDialog to your app using Appcompat 369 ............................................. Section 38.2: A Basic Alert Dialog 369 ............................................................................................................................ Section 38.3: ListView in AlertDialog 370 ....................................................................................................................... Section 38.4: Custom Alert Dialog with EditText 371 .................................................................................................... Section 38.5: DatePickerDialog 372 ................................................................................................................................ Section 38.6: DatePicker 372 ........................................................................................................................................... Section 38.7: Alert Dialog 373 ......................................................................................................................................... Section 38.8: Alert Dialog with Multi-line Title 374 ........................................................................................................ Section 38.9: Date Picker within DialogFragment 376 .................................................................................................

Page 9

Section 38.10: Fullscreen Custom Dialog with no background and no title 378 ........................................................ Chapter 39: ACRA 380 ...................................................................................................................................................... Section 39.1: ACRAHandler 380 ....................................................................................................................................... Section 39.2: Example manifest 380 ............................................................................................................................... Section 39.3: Installation 381 ........................................................................................................................................... Chapter 40: GreenDAO 382 .......................................................................................................................................... Section 40.1: Helper methods for SELECT, INSERT, DELETE, UPDATE queries 382 ................................................... Section 40.2: Creating an Entity with GreenDAO 3.X that has a Composite Primary Key 384 ................................ Section 40.3: Getting started with GreenDao v3.X 385 ................................................................................................. Chapter 41: Formatting Strings 387 ........................................................................................................................ Section 41.1: Format a string resource 387 .................................................................................................................... Section 41.2: Formatting data types to String and vise versa 387 .............................................................................. Section 41.3: Format a timestamp to string 387 ............................................................................................................ Chapter 42: Notifications 388 ..................................................................................................................................... Section 42.1: Heads Up Notification with Ticker for older devices 388 ....................................................................... Section 42.2: Creating a simple Notification 392 .......................................................................................................... Section 42.3: Set custom notification - show full content text 392 .............................................................................. Section 42.4: Dynamically getting the correct pixel size for the large icon 393 ........................................................ Section 42.5: Ongoing notification with Action button 393 .......................................................................................... Section 42.6: Setting Dierent priorities in notification 394 ......................................................................................... Section 42.7: Set custom notification icon using `Picasso` library 395 ........................................................................ Section 42.8: Scheduling notifications 396 ..................................................................................................................... Chapter 43: AlarmManager 398 ................................................................................................................................ Section 43.1: How to Cancel an Alarm 398 ..................................................................................................................... Section 43.2: Creating exact alarms on all Android versions 398 ............................................................................... Section 43.3: API23+ Doze mode interferes with AlarmManager 399 ........................................................................ Section 43.4: Run an intent at a later time 399 ............................................................................................................. Chapter 44: Fragments 400 ........................................................................................................................................ Section 44.1: Pass data from Activity to Fragment using Bundle 400 ........................................................................ Section 44.2: The newInstance() pattern 400 ................................................................................................................ Section 44.3: Navigation between fragments using backstack and static fabric pattern 401 ................................ Section 44.4: Sending events back to an activity with callback interface 402 .......................................................... Section 44.5: Animate the transition between fragments 403 .................................................................................... Section 44.6: Communication between Fragments 404 ............................................................................................... Chapter 45: Handler 409 ............................................................................................................................................... Section 45.1: HandlerThreads and communication between Threads 409 ................................................................ Section 45.2: Use Handler to create a Timer (similar to javax.swing.Timer) 409 ...................................................... Section 45.3: Using a Handler to execute code after a delayed amount of time 410 .............................................. Section 45.4: Stop handler from execution 411 ............................................................................................................ Chapter 46: Creating Custom Views 412 ............................................................................................................... Section 46.1: Creating Custom Views 412 ...................................................................................................................... Section 46.2: Adding attributes to views 414 ................................................................................................................. Section 46.3: CustomView performance tips 416 ......................................................................................................... Section 46.4: Creating a compound view 417 ............................................................................................................... Section 46.5: Compound view for SVG/VectorDrawable as drawableRight 420 ...................................................... Section 46.6: Responding to Touch Events 423 ............................................................................................................ Chapter 47: BroadcastReceiver 424 ....................................................................................................................... Section 47.1: Using LocalBroadcastManager 424 ......................................................................................................... Section 47.2: BroadcastReceiver Basics 424 .................................................................................................................

Page 10

Section 47.3: Introduction to Broadcast receiver 425 ................................................................................................... Section 47.4: Using ordered broadcasts 425 ................................................................................................................. Section 47.5: Sticky Broadcast 426 ................................................................................................................................. Section 47.6: Enabling and disabling a Broadcast Receiver programmatically 426 ................................................ Section 47.7: Example of a LocalBroadcastManager 427 ........................................................................................... Section 47.8: Android stopped state 428 ....................................................................................................................... Section 47.9: Communicate two activities through custom Broadcast receiver 428 ................................................ Section 47.10: BroadcastReceiver to handle BOOT_COMPLETED events 429 .......................................................... Section 47.11: Bluetooth Broadcast receiver 430 ........................................................................................................... Chapter 48: Activity 431 ................................................................................................................................................ Section 48.1: Activity launchMode 431 ............................................................................................................................ Section 48.2: Exclude an activity from back-stack history 432 ................................................................................... Section 48.3: Android Activity LifeCycle Explained 432 ................................................................................................ Section 48.4: End Application with exclude from Recents 435 .................................................................................... Section 48.5: Presenting UI with setContentView 436 .................................................................................................. Section 48.6: Up Navigation for Activities 437 ............................................................................................................... Section 48.7: Clear your current Activity stack and launch a new Activity 438 ......................................................... Chapter 49: Snackbar 440 ............................................................................................................................................ Section 49.1: Creating a simple Snackbar 440 ............................................................................................................... Section 49.2: Custom Snack Bar 440 .............................................................................................................................. Section 49.3: Custom Snackbar (no need view) 441 .................................................................................................... Section 49.4: Snackbar with Callback 442 ..................................................................................................................... Section 49.5: Snackbar vs Toasts: Which one should I use? 442 ................................................................................. Section 49.6: Custom Snackbar 443 ............................................................................................................................... Chapter 50: Runtime Permissions in API-23 + 444 ............................................................................................ Section 50.1: Android 6.0 multiple permissions 444 ...................................................................................................... Section 50.2: Multiple Runtime Permissions From Same Permission Groups 445 ..................................................... Section 50.3: Using PermissionUtil 446 .......................................................................................................................... Section 50.4: Include all permission-related code to an abstract base class and extend the activity of this base class to achieve cleaner/reusable code 447 ............................................................................................... Section 50.5: Enforcing Permissions in Broadcasts, URI 449 ....................................................................................... Chapter 51: Logging and using Logcat 451 .......................................................................................................... Section 51.1: Filtering the logcat output 451 ................................................................................................................... Section 51.2: Logging 452 ................................................................................................................................................ Section 51.3: Using the Logcat 454 ................................................................................................................................. Section 51.4: Log with link to source directly from Logcat 455 ................................................................................... Section 51.5: Clear logs 455 ............................................................................................................................................. Section 51.6: Android Studio usage 455 ......................................................................................................................... Section 51.7: Generating Logging code 456 ................................................................................................................... Chapter 52: VectorDrawable and AnimatedVectorDrawable 458 .......................................................... Section 52.1: Basic VectorDrawable 458 ........................................................................................................................ Section 52.2: <group> tags 458 ....................................................................................................................................... Section 52.3: Basic AnimatedVectorDrawable 459 ....................................................................................................... Section 52.4: Using Strokes 460 ...................................................................................................................................... Section 52.5: Using <clip-path> 462 ................................................................................................................................ Section 52.6: Vector compatibility through AppCompat 462 ...................................................................................... Chapter 53: Tools Attributes 464 ............................................................................................................................... Section 53.1: Designtime Layout Attributes 464 ............................................................................................................ Chapter 54: Toast 465 ....................................................................................................................................................

Page 11

Section 54.1: Creating a custom Toast 465 .................................................................................................................... Section 54.2: Set position of a Toast 466 ....................................................................................................................... Section 54.3: Showing a Toast Message 466 ................................................................................................................. Section 54.4: Show Toast Message Above Soft Keyboard 467 ................................................................................... Section 54.5: Thread safe way of displaying Toast (Application Wide) 467 ............................................................. Section 54.6: Thread safe way of displaying a Toast Message (For AsyncTask) 468 ............................................. Chapter 55: Interfaces 469 ........................................................................................................................................... Section 55.1: Custom Listener 469 ................................................................................................................................... Section 55.2: Basic Listener 470 ...................................................................................................................................... Chapter 56: Animators 472 ........................................................................................................................................... Section 56.1: TransitionDrawable animation 472 .......................................................................................................... Section 56.2: Fade in/out animation 472 ....................................................................................................................... Section 56.3: ValueAnimator 473 .................................................................................................................................... Section 56.4: Expand and Collapse animation of View 474 ......................................................................................... Section 56.5: ObjectAnimator 475 .................................................................................................................................. Section 56.6: ViewPropertyAnimator 475 ...................................................................................................................... Section 56.7: Shake animation of an ImageView 476 .................................................................................................. Chapter 57: Location 478 .............................................................................................................................................. Section 57.1: Fused location API 478 ............................................................................................................................... Section 57.2: Get Address From Location using Geocoder 482 .................................................................................. Section 57.3: Requesting location updates using LocationManager 483 ................................................................... Section 57.4: Requesting location updates on a separate thread using LocationManager 484 ............................. Section 57.5: Getting location updates in a BroadcastReceiver 485 .......................................................................... Section 57.6: Register geofence 486 .............................................................................................................................. Chapter 58: Theme, Style, Attribute 490 ............................................................................................................... Section 58.1: Define primary, primary dark, and accent colors 490 ........................................................................... Section 58.2: Multiple Themes in one App 490 .............................................................................................................. Section 58.3: Navigation Bar Color (API 21+) 492 ......................................................................................................... Section 58.4: Use Custom Theme Per Activity 492 ....................................................................................................... Section 58.5: Light Status Bar (API 23+) 493 ................................................................................................................. Section 58.6: Use Custom Theme Globally 493 ............................................................................................................. Section 58.7: Overscroll Color (API 21+) 493 .................................................................................................................. Section 58.8: Ripple Color (API 21+) 493 ......................................................................................................................... Section 58.9: Translucent Navigation and Status Bars (API 19+) 494 ......................................................................... Section 58.10: Theme inheritance 494 ............................................................................................................................ Chapter 59: The Manifest File 495 ............................................................................................................................ Section 59.1: Declaring Components 495 ....................................................................................................................... Section 59.2: Declaring permissions in your manifest file 495 .................................................................................... Chapter 60: Parcelable 497 .......................................................................................................................................... Section 60.1: Making a custom object Parcelable 497 .................................................................................................. Section 60.2: Parcelable object containing another Parcelable object 498 ............................................................... Section 60.3: Using Enums with Parcelable 499 ............................................................................................................ Chapter 61: MediaPlayer 501 ....................................................................................................................................... Section 61.1: Basic creation and playing 501 ................................................................................................................. Section 61.2: Media Player with Buer progress and play position 501 ..................................................................... Section 61.3: Getting system ringtones 503 ................................................................................................................... Section 61.4: Asynchronous prepare 504 ....................................................................................................................... Section 61.5: Import audio into androidstudio and play it 504 .................................................................................... Section 61.6: Getting and setting system volume 506 ..................................................................................................

Page 12

Chapter 62: Multidex and the Dex Method Limit 508 ...................................................................................... Section 62.1: Enabling Multidex 508 ................................................................................................................................ Section 62.2: Multidex by extending Application 509 ................................................................................................... Section 62.3: Multidex by extending MultiDexApplication 509 ..................................................................................... Section 62.4: Multidex by using MultiDexApplication directly 510 ............................................................................... Section 62.5: Counting Method References On Every Build (Dexcount Gradle Plugin) 510 ..................................... Chapter 63: Data Synchronization with Sync Adapter 512 .......................................................................... Section 63.1: Dummy Sync Adapter with Stub Provider 512 ........................................................................................ Chapter 64: Menu 518 ..................................................................................................................................................... Section 64.1: Options menu with dividers 518 ................................................................................................................ Section 64.2: Apply custom font to Menu 518 ............................................................................................................... Section 64.3: Creating a Menu in an Activity 519 .......................................................................................................... Chapter 65: Instant Run in Android Studio 522 .................................................................................................. Section 65.1: Enabling or disabling Instant Run 522 ...................................................................................................... Section 65.2: Types of code Swaps in Instant Run 522 ................................................................................................ Section 65.3: Unsupported code changes when using Instant Run 523 ..................................................................... Chapter 66: Picasso 524 ................................................................................................................................................. Section 66.1: Adding Picasso Library to your Android Project 524 .............................................................................. Section 66.2: Circular Avatars with Picasso 524 ............................................................................................................ Section 66.3: Placeholder and Error Handling 526 ....................................................................................................... Section 66.4: Re-sizing and Rotating 526 ...................................................................................................................... Section 66.5: Disable cache in Picasso 527 .................................................................................................................... Section 66.6: Using Picasso as ImageGetter for Html.fromHtml 527 ......................................................................... Section 66.7: Cancelling Image Requests using Picasso 528 ....................................................................................... Section 66.8: Loading Image from external Storage 529 ............................................................................................ Section 66.9: Downloading image as Bitmap using Picasso 529 ................................................................................ Section 66.10: Try oine disk cache first, then go online and fetch the image 529 ................................................. Chapter 67: Bluetooth and Bluetooth LE API 531 ............................................................................................. Section 67.1: Permissions 531 .......................................................................................................................................... Section 67.2: Check if bluetooth is enabled 531 ............................................................................................................ Section 67.3: Find nearby Bluetooth Low Energy devices 531 .................................................................................... Section 67.4: Make device discoverable 536 ................................................................................................................. Section 67.5: Connect to Bluetooth device 536 ............................................................................................................. Section 67.6: Find nearby bluetooth devices 538 .......................................................................................................... Chapter 68: RoboGuice 539 .......................................................................................................................................... Section 68.1: Simple example 539 ................................................................................................................................... Section 68.2: Installation for Gradle Projects 539 ......................................................................................................... Section 68.3: @ContentView annotation 539 ................................................................................................................ Section 68.4: @InjectResource annotation 539 ............................................................................................................. Section 68.5: @InjectView annotation 540 ..................................................................................................................... Section 68.6: Introduction to RoboGuice 540 ................................................................................................................ Chapter 69: Memory Leaks 543 ................................................................................................................................. Section 69.1: Avoid leaking Activities with AsyncTask 543 ........................................................................................... Section 69.2: Common memory leaks and how to fix them 544 ................................................................................ Section 69.3: Detect memory leaks with the LeakCanary library 545 ........................................................................ Section 69.4: Anonymous callback in activities 545 ...................................................................................................... Section 69.5: Activity Context in static classes 546 ....................................................................................................... Section 69.6: Avoid leaking Activities with Listeners 547 .............................................................................................. Section 69.7: Avoid memory leaks with Anonymous Class, Handler, Timer Task, Thread 552 ...............................

Page 13

Chapter 70: Universal Image Loader 554 ............................................................................................................. Section 70.1: Basic usage 554 .......................................................................................................................................... Section 70.2: Initialize Universal Image Loader 554 ..................................................................................................... Chapter 71: Volley 555 .................................................................................................................................................... Section 71.1: Using Volley for HTTP requests 555 .......................................................................................................... Section 71.2: Basic StringRequest using GET method 556 ........................................................................................... Section 71.3: Adding custom design time attributes to NetworkImageView 557 ....................................................... Section 71.4: Adding custom headers to your requests [e.g. for basic auth] 558 ..................................................... Section 71.5: Remote server authentication using StringRequest through POST method 559 ................................ Section 71.6: Cancel a request 561 .................................................................................................................................. Section 71.7: Request JSON 561 ...................................................................................................................................... Section 71.8: Use JSONArray as request body 561 ...................................................................................................... Section 71.9: Boolean variable response from server with json request in volley 562 .............................................. Section 71.10: Helper Class for Handling Volley Errors 563 .......................................................................................... Chapter 72: Widgets 565 ................................................................................................................................................ Section 72.1: Manifest Declaration - 565 ........................................................................................................................ Section 72.2: Metadata 565 ............................................................................................................................................. Section 72.3: AppWidgetProvider Class 565 .................................................................................................................. Section 72.4: Create/Integrate Basic Widget using Android Studio 566 .................................................................... Section 72.5: Two widgets with dierent layouts declaration 567 .............................................................................. Chapter 73: Date and Time Pickers 569 ................................................................................................................. Section 73.1: Date Picker Dialog 569 ............................................................................................................................... Section 73.2: Material DatePicker 569 ............................................................................................................................ Chapter 74: Integrate Google Sign In 572 ............................................................................................................ Section 74.1: Google Sign In with Helper class 572 ....................................................................................................... Chapter 75: In-app Billing 575 ..................................................................................................................................... Section 75.1: Consumable In-app Purchases 575 .......................................................................................................... Section 75.2: (Third party) In-App v3 Library 579 ......................................................................................................... Chapter 76: FloatingActionButton 581 ................................................................................................................... Section 76.1: How to add the FAB to the layout 581 ..................................................................................................... Section 76.2: Show and Hide FloatingActionButton on Swipe 582 .............................................................................. Section 76.3: Show and Hide FloatingActionButton on Scroll 584 ............................................................................... Section 76.4: Setting behaviour of FloatingActionButton 586 ..................................................................................... Chapter 77: ContentProvider 587 ............................................................................................................................. Section 77.1: Implementing a basic content provider class 587 .................................................................................. Chapter 78: Dagger 2 591 ............................................................................................................................................. Section 78.1: Component setup for Application and Activity injection 591 ................................................................. Section 78.2: Custom Scopes 592 ................................................................................................................................... Section 78.3: Using @Subcomponent instead of @Component(dependencies={...}) 593 ........................................ Section 78.4: Creating a component from multiple modules 593 ............................................................................... Section 78.5: How to add Dagger 2 in build.gradle 594 ............................................................................................... Section 78.6: Constructor Injection 595 .......................................................................................................................... Chapter 79: Realm 597 ................................................................................................................................................... Section 79.1: Sorted queries 597 ...................................................................................................................................... Section 79.2: Using Realm with RxJava 597 .................................................................................................................. Section 79.3: Basic Usage 598 ......................................................................................................................................... Section 79.4: List of primitives (RealmList<Integer/String/...>) 601 ............................................................................ Section 79.5: Async queries 602 ...................................................................................................................................... Section 79.6: Adding Realm to your project 602 ...........................................................................................................

Page 14

Section 79.7: Realm Models 602 ..................................................................................................................................... Section 79.8: try-with-resources 603 .............................................................................................................................. Chapter 80: Unit testing in Android with JUnit 604 .......................................................................................... Section 80.1: Moving Business Logic Out of Android Componenets 604 .................................................................... Section 80.2: Creating Local unit tests 606 .................................................................................................................... Section 80.3: Getting started with JUnit 607 ................................................................................................................. Section 80.4: Exceptions 610 ........................................................................................................................................... Section 80.5: Static import 611 ....................................................................................................................................... Chapter 81: Android Versions 612 ............................................................................................................................. Section 81.1: Checking the Android Version on device at runtime 612 ........................................................................ Chapter 82: Wi-Fi Connections 613 ........................................................................................................................... Section 82.1: Connect with WEP encryption 613 ........................................................................................................... Section 82.2: Connect with WPA2 encryption 613 ........................................................................................................ Section 82.3: Scan for access points 614 ....................................................................................................................... Chapter 83: SensorManager 616 ............................................................................................................................... Section 83.1: Decide if your device is static or not, using the accelerometer 616 ..................................................... Section 83.2: Retrieving sensor events 616 ................................................................................................................... Section 83.3: Sensor transformation to world coordinate system 617 ...................................................................... Chapter 84: Localization with resources in Android 619 .............................................................................. Section 84.1: Configuration types and qualifier names for each folder under the "res" directory 619 .................. Section 84.2: Adding translation to your Android app 620 .......................................................................................... Section 84.3: Type of resource directories under the "res" folder 622 ....................................................................... Section 84.4: Change locale of android application programmatically 622 ............................................................. Section 84.5: Currency 625 .............................................................................................................................................. Chapter 85: ProgressBar 626 ...................................................................................................................................... Section 85.1: Material Linear ProgressBar 626 .............................................................................................................. Section 85.2: Tinting ProgressBar 628 ........................................................................................................................... Section 85.3: Customized progressbar 628 ................................................................................................................... Section 85.4: Creating Custom Progress Dialog 630 .................................................................................................... Section 85.5: Indeterminate ProgressBar 632 ............................................................................................................... Section 85.6: Determinate ProgressBar 633 .................................................................................................................. Chapter 86: Custom Fonts 635 ................................................................................................................................... Section 86.1: Custom font in canvas text 635 ................................................................................................................ Section 86.2: Working with fonts in Android O 635 ....................................................................................................... Section 86.3: Custom font to whole activity 636 ........................................................................................................... Section 86.4: Putting a custom font in your app 636 .................................................................................................... Section 86.5: Initializing a font 636 ................................................................................................................................. Section 86.6: Using a custom font in a TextView 636 ................................................................................................... Section 86.7: Apply font on TextView by xml (Not required Java code) 637 ............................................................ Section 86.8: Ecient Typeface loading 638 ................................................................................................................ Chapter 87: Vibration 639 ............................................................................................................................................. Section 87.1: Getting Started with Vibration 639 ........................................................................................................... Section 87.2: Vibrate Indefinitely 639 ............................................................................................................................. Section 87.3: Vibration Patterns 639 ............................................................................................................................... Section 87.4: Stop Vibrate 640 ........................................................................................................................................ Section 87.5: Vibrate for one time 640 ........................................................................................................................... Chapter 88: Google Awareness APIs 641 ............................................................................................................... Section 88.1: Get changes for location within a certain range using Fence API 641 ................................................. Section 88.2: Get current location using Snapshot API 642 .........................................................................................

Page 15

Section 88.3: Get changes in user activity with Fence API 642 .................................................................................... Section 88.4: Get current user activity using Snapshot API 643 .................................................................................. Section 88.5: Get headphone state with Snapshot API 643 ......................................................................................... Section 88.6: Get nearby places using Snapshot API 644 ............................................................................................ Section 88.7: Get current weather using Snapshot API 644 ......................................................................................... Chapter 89: Text to Speech(TTS) 645 ..................................................................................................................... Section 89.1: Text to Speech Base 645 ........................................................................................................................... Section 89.2: TextToSpeech implementation across the APIs 646 ............................................................................. Chapter 90: UI Lifecycle 650 ........................................................................................................................................ Section 90.1: Saving data on memory trimming 650 .................................................................................................... Chapter 91: Spinner 651 .................................................................................................................................................. Section 91.1: Basic Spinner Example 651 ........................................................................................................................ Section 91.2: Adding a spinner to your activity 652 ...................................................................................................... Chapter 92: Data Encryption/Decryption 654 ................................................................................................... Section 92.1: AES encryption of data using password in a secure way 654 .............................................................. Chapter 93: Testing UI with Espresso 656 ............................................................................................................. Section 93.1: Overall Espresso 656 .................................................................................................................................. Section 93.2: Espresso simple UI test 658 ...................................................................................................................... Section 93.3: Open Close DrawerLayout 661 ................................................................................................................ Section 93.4: Set Up Espresso 662 .................................................................................................................................. Section 93.5: Performing an action on a view 663 ........................................................................................................ Section 93.6: Finding a view with onView 663 ............................................................................................................... Section 93.7: Create Espresso Test Class 663 ............................................................................................................... Section 93.8: Up Navigation 664 ..................................................................................................................................... Section 93.9: Group a collection of test classes in a test suite 664 ............................................................................. Section 93.10: Espresso custom matchers 665 .............................................................................................................. Chapter 94: Writing UI tests - Android 668 .......................................................................................................... Section 94.1: MockWebServer example 668 .................................................................................................................. Section 94.2: IdlingResource 670 .................................................................................................................................... Chapter 95: GreenRobot EventBus 674 .................................................................................................................. Section 95.1: Passing a Simple Event 674 ....................................................................................................................... Section 95.2: Receiving Events 675 ................................................................................................................................ Section 95.3: Sending Events 675 ................................................................................................................................... Chapter 96: OkHttp 676 .................................................................................................................................................. Section 96.1: Basic usage example 676 .......................................................................................................................... Section 96.2: Setting up OkHttp 676 ............................................................................................................................... Section 96.3: Logging interceptor 676 ............................................................................................................................ Section 96.4: Synchronous Get Call 677 ......................................................................................................................... Section 96.5: Asynchronous Get Call 677 ....................................................................................................................... Section 96.6: Posting form parameters 678 .................................................................................................................. Section 96.7: Posting a multipart request 678 ............................................................................................................... Section 96.8: Rewriting Responses 678 .......................................................................................................................... Chapter 97: Enhancing Android Performance Using Icon Fonts 680 ...................................................... Section 97.1: How to integrate Icon fonts 680 ............................................................................................................... Section 97.2: TabLayout with icon fonts 682 ................................................................................................................. Chapter 98: Handling Deep Links 684 ..................................................................................................................... Section 98.1: Retrieving query parameters 684 ............................................................................................................ Section 98.2: Simple deep link 684 ................................................................................................................................. Section 98.3: Multiple paths on a single domain 685 ....................................................................................................

Page 16

Section 98.4: Multiple domains and multiple paths 685 ............................................................................................... Section 98.5: Both http and https for the same domain 686 ....................................................................................... Section 98.6: Using pathPrefix 686 ................................................................................................................................. Chapter 99: Canvas drawing using SurfaceView 687 ..................................................................................... Section 99.1: SurfaceView with drawing thread 687 ..................................................................................................... Chapter 100: Firebase 692 ............................................................................................................................................ Section 100.1: Add Firebase to Your Android Project 692 ............................................................................................. Section 100.2: Updating a Firebase users's email 693 .................................................................................................. Section 100.3: Create a Firebase user 694 ..................................................................................................................... Section 100.4: Change Password 695 ............................................................................................................................. Section 100.5: Firebase Cloud Messaging 696 ............................................................................................................... Section 100.6: Firebase Storage Operations 698 .......................................................................................................... Section 100.7: Firebase Realtime Database: how to set/get data 704 ....................................................................... Section 100.8: Demo of FCM based notifications 705 ................................................................................................... Section 100.9: Sign In Firebase user with email and password 715 ............................................................................ Section 100.10: Send Firebase password reset email 716 ............................................................................................ Section 100.11: Re-Authenticate Firebase user 718 ....................................................................................................... Section 100.12: Firebase Sign Out 719 ............................................................................................................................ Chapter 101: Crash Reporting Tools 720 ................................................................................................................ Section 101.1: Fabric - Crashlytics 720 ............................................................................................................................. Section 101.2: Capture crashes using Sherlock 725 ....................................................................................................... Section 101.3: Force a Test Crash With Fabric 726 ........................................................................................................ Section 101.4: Crash Reporting with ACRA 727 .............................................................................................................. Chapter 102: Check Internet Connectivity 729 ................................................................................................... Section 102.1: Check if device has internet connectivity 729 ........................................................................................ Section 102.2: How to check network strength in android? 729 .................................................................................. Section 102.3: How to check network strength 730 ...................................................................................................... Chapter 103: Facebook SDK for Android 733 ...................................................................................................... Section 103.1: How to add Facebook Login in Android 733 .......................................................................................... Section 103.2: Create your own custom button for Facebook login 735 .................................................................... Section 103.3: A minimalistic guide to Facebook login/signup implementation 736 ................................................ Section 103.4: Setting permissions to access data from the Facebook profile 737 .................................................. Section 103.5: Logging out of Facebook 737 ................................................................................................................. Chapter 104: Unzip File in Android 738 ................................................................................................................... Section 104.1: Unzip file 738 ............................................................................................................................................. Chapter 105: Android Places API 739 ....................................................................................................................... Section 105.1: Getting Current Places by Using Places API 739 ................................................................................... Section 105.2: Place Autocomplete Integration 740 ..................................................................................................... Section 105.3: Place Picker Usage Example 741 ........................................................................................................... Section 105.4: Setting place type filters for PlaceAutocomplete 742 .......................................................................... Section 105.5: Adding more than one google auto complete activity 743 ................................................................. Chapter 106: Creating your own libraries for Android applications 745 .............................................. Section 106.1: Create a library available on Jitpack.io 745 .......................................................................................... Section 106.2: Creating library project 745 .................................................................................................................... Section 106.3: Using library in project as a module 746 ............................................................................................... Chapter 107: Gson 747 .................................................................................................................................................... Section 107.1: Parsing JSON with Gson 747 ................................................................................................................... Section 107.2: Adding a custom Converter to Gson 749 .............................................................................................. Section 107.3: Parsing a List<String> with Gson 749 .....................................................................................................

Page 17

Section 107.4: Adding Gson to your project 750 ............................................................................................................ Section 107.5: Parsing JSON to Generic Class Object with Gson 750 ......................................................................... Section 107.6: Using Gson with inheritance 751 ............................................................................................................. Section 107.7: Parsing JSON property to enum with Gson 753 ................................................................................... Section 107.8: Using Gson to load a JSON file from disk 753 ...................................................................................... Section 107.9: Using Gson as serializer with Retrofit 753 ............................................................................................. Section 107.10: Parsing json array to generic class using Gson 754 ........................................................................... Section 107.11: Custom JSON Deserializer using Gson 755 ........................................................................................... Section 107.12: JSON Serialization/Deserialization with AutoValue and Gson 756 ................................................... Chapter 108: Device Display Metrics 758 ............................................................................................................... Section 108.1: Get the screens pixel dimensions 758 ..................................................................................................... Section 108.2: Get screen density 758 ............................................................................................................................ Section 108.3: Formula px to dp, dp to px conversation 758 ....................................................................................... Chapter 109: TextView 759 ............................................................................................................................................ Section 109.1: Spannable TextView 759 .......................................................................................................................... Section 109.2: Strikethrough TextView 760 .................................................................................................................... Section 109.3: TextView with image 761 ......................................................................................................................... Section 109.4: Make RelativeSizeSpan align to top 761 ............................................................................................... Section 109.5: Pinchzoom on TextView 763 ................................................................................................................... Section 109.6: Textview with dierent Textsize 764 ...................................................................................................... Section 109.7: Theme and Style customization 764 ...................................................................................................... Section 109.8: TextView customization 766 ................................................................................................................... Section 109.9: Single TextView with two dierent colors 769 ...................................................................................... Chapter 110: ListView 771 .............................................................................................................................................. Section 110.1: Custom ArrayAdapter 771 ........................................................................................................................ Section 110.2: A basic ListView with an ArrayAdapter 772 ........................................................................................... Section 110.3: Filtering with CursorAdapter 772 ............................................................................................................. Chapter 111: Building Backwards Compatible Apps 774 ................................................................................. Section 111.1: How to handle deprecated API 774 .......................................................................................................... Chapter 112: Loader 776 ................................................................................................................................................. Section 112.1: Basic AsyncTaskLoader 776 ..................................................................................................................... Section 112.2: AsyncTaskLoader with cache 777 ........................................................................................................... Section 112.3: Reloading 778 ............................................................................................................................................ Section 112.4: Pass parameters using a Bundle 779 ..................................................................................................... Chapter 113: ProGuard - Obfuscating and Shrinking your code 780 ....................................................... Section 113.1: Rules for some of the widely used Libraries 780 .................................................................................... Section 113.2: Remove trace logging (and other) statements at build time 782 ....................................................... Section 113.3: Protecting your code from hackers 782 ................................................................................................. Section 113.4: Enable ProGuard for your build 783 ........................................................................................................ Section 113.5: Enabling ProGuard with a custom obfuscation configuration file 783 ................................................ Chapter 114: Detect Shake Event in Android 785 .............................................................................................. Section 114.1: Shake Detector in Android Example 785 ................................................................................................. Section 114.2: Using Seismic shake detection 786 ......................................................................................................... Chapter 115: Typedef Annotations: @IntDef, @StringDef 787 ................................................................... Section 115.1: IntDef Annotations 787 .............................................................................................................................. Section 115.2: Combining constants with flags 787 ....................................................................................................... Chapter 116: Capturing Screenshots 789 ............................................................................................................... Section 116.1: Taking a screenshot of a particular view 789 ......................................................................................... Section 116.2: Capturing Screenshot via Android Studio 789 .......................................................................................

Page 18

Section 116.3: Capturing Screenshot via ADB and saving directly in your PC 790 ..................................................... Section 116.4: Capturing Screenshot via Android Device Monitor 790 ........................................................................ Section 116.5: Capturing Screenshot via ADB 791 ......................................................................................................... Chapter 117: MVP Architecture 792 ........................................................................................................................... Section 117.1: Login example in the Model View Presenter (MVP) pattern 792 .......................................................... Section 117.2: Simple Login Example in MVP 795 .......................................................................................................... Chapter 118: Orientation Changes 802 .................................................................................................................... Section 118.1: Saving and Restoring Activity State 802 ................................................................................................. Section 118.2: Retaining Fragments 802 ......................................................................................................................... Section 118.3: Manually Managing Configuration Changes 803 .................................................................................. Section 118.4: Handling AsyncTask 804 .......................................................................................................................... Section 118.5: Lock Screen's rotation programmatically 805 ....................................................................................... Section 118.6: Saving and Restoring Fragment State 806 ............................................................................................ Chapter 119: Xposed 808 ................................................................................................................................................ Section 119.1: Creating a Xposed Module 808 ................................................................................................................ Section 119.2: Hooking a method 808 ............................................................................................................................. Chapter 120: Security 810 .............................................................................................................................................. Section 120.1: Verifying App Signature - Tamper Detection 810 ................................................................................. Chapter 121: PackageManager 811 .......................................................................................................................... Section 121.1: Retrieve application version 811 .............................................................................................................. Section 121.2: Version name and version code 811 ...................................................................................................... Section 121.3: Install time and update time 811 ............................................................................................................. Section 121.4: Utility method using PackageManager 812 ........................................................................................... Chapter 122: ImageView 814 ........................................................................................................................................ Section 122.1: Set tint 814 ................................................................................................................................................. Section 122.2: Set alpha 815 ............................................................................................................................................ Section 122.3: Set Scale Type 815 ................................................................................................................................... Section 122.4: ImageView ScaleType - Center 820 ....................................................................................................... Section 122.5: ImageView ScaleType - CenterCrop 822 ............................................................................................... Section 122.6: ImageView ScaleType - CenterInside 824 ............................................................................................. Section 122.7: ImageView ScaleType - FitStart and FitEnd 826 .................................................................................. Section 122.8: ImageView ScaleType - FitCenter 830 ................................................................................................... Section 122.9: Set Image Resource 832 .......................................................................................................................... Section 122.10: ImageView ScaleType - FitXy 833 ........................................................................................................ Section 122.11: MLRoundedImageView.java 835 ............................................................................................................ Chapter 123: Gesture Detection 838 ......................................................................................................................... Section 123.1: Swipe Detection 838 .................................................................................................................................. Section 123.2: Basic Gesture Detection 839 ................................................................................................................... Chapter 124: Doze Mode 841 ....................................................................................................................................... Section 124.1: Whitelisting an Android application programmatically 841 ................................................................. Section 124.2: Exclude app from using doze mode 841 ............................................................................................... Chapter 125: Android Sound and Media 842 ........................................................................................................ Section 125.1: How to pick image and video for api >19 842 ........................................................................................ Section 125.2: Play sounds via SoundPool 843 .............................................................................................................. Chapter 126: SearchView 844 ...................................................................................................................................... Section 126.1: Setting Theme for SearchView 844 ......................................................................................................... Section 126.2: SearchView in Toolbar with Fragment 844 ........................................................................................... Section 126.3: Appcompat SearchView with RxBindings watcher 846 ........................................................................ Chapter 127: Camera and Gallery 849 ....................................................................................................................

Page 19

Section 127.1: Take photo 849 .......................................................................................................................................... Section 127.2: Taking full-sized photo from camera 851 ............................................................................................. Section 127.3: Decode bitmap correctly rotated from the uri fetched with the intent 854 ....................................... Section 127.4: Set camera resolution 856 ....................................................................................................................... Section 127.5: How to start camera or gallery and save camera result to storage 856 .......................................... Chapter 128: Callback URL 860 ................................................................................................................................... Section 128.1: Callback URL example with Instagram OAuth 860 ............................................................................... Chapter 129: Twitter APIs 861 ...................................................................................................................................... Section 129.1: Creating login with twitter button and attach a callback to it 861 ...................................................... Chapter 130: Drawables 863 ........................................................................................................................................ Section 130.1: Custom Drawable 863 .............................................................................................................................. Section 130.2: Tint a drawable 864 ................................................................................................................................. Section 130.3: Circular View 865 ...................................................................................................................................... Section 130.4: Make View with rounded corners 865 .................................................................................................... Chapter 131: Colors 867 ................................................................................................................................................... Section 131.1: Color Manipulation 867 .............................................................................................................................. Chapter 132: ConstraintLayout 868 .......................................................................................................................... Section 132.1: Adding ConstraintLayout to your project 868 ....................................................................................... Section 132.2: Chains 869 ................................................................................................................................................. Chapter 133: RenderScript 870 ................................................................................................................................... Section 133.1: Getting Started 870 ................................................................................................................................... Section 133.2: Blur a View 876 ......................................................................................................................................... Section 133.3: Blur an image 878 .................................................................................................................................... Chapter 134: Fresco 881 ................................................................................................................................................. Section 134.1: Getting Started with Fresco 881 .............................................................................................................. Section 134.2: Using OkHttp 3 with Fresco 882 .............................................................................................................. Section 134.3: JPEG Streaming with Fresco using DraweeController 882 .................................................................. Chapter 135: Swipe to Refresh 883 ........................................................................................................................... Section 135.1: How to add Swipe-to-Refresh To your app 883 .................................................................................... Section 135.2: Swipe To Refresh with RecyclerView 883 .............................................................................................. Chapter 136: AutoCompleteTextView 885 ............................................................................................................. Section 136.1: AutoComplete with CustomAdapter, ClickListener and Filter 885 ....................................................... Section 136.2: Simple, hard-coded AutoCompleteTextView 888 ................................................................................. Chapter 137: Installing apps with ADB 889 ........................................................................................................... Section 137.1: Uninstall an app 889 ................................................................................................................................. Section 137.2: Install all apk file in directory 889 ........................................................................................................... Section 137.3: Install an app 889 ..................................................................................................................................... Chapter 138: IntentService 890 ................................................................................................................................... Section 138.1: Creating an IntentService 890 .................................................................................................................. Section 138.2: Basic IntentService Example 890 ............................................................................................................ Section 138.3: Sample Intent Service 891 ....................................................................................................................... Chapter 139: AdMob 893 ................................................................................................................................................. Section 139.1: Implementing 893 ...................................................................................................................................... Chapter 140: Implicit Intents 895 ............................................................................................................................... Section 140.1: Implicit and Explicit Intents 895 ............................................................................................................... Section 140.2: Implicit Intents 895 ................................................................................................................................... Chapter 141: Publish to Play Store 896 ................................................................................................................... Section 141.1: Minimal app submission guide 896 ..........................................................................................................

Page 20

Chapter 142: Firebase Realtime DataBase 898 ................................................................................................. Section 142.1: Quick setup 898 ......................................................................................................................................... Section 142.2: Firebase Realtime DataBase event handler 898 .................................................................................. Section 142.3: Understanding firebase JSON database 899 ....................................................................................... Section 142.4: Retrieving data from firebase 900 ......................................................................................................... Section 142.5: Listening for child updates 901 ............................................................................................................... Section 142.6: Retrieving data with pagination 902 ...................................................................................................... Section 142.7: Denormalization: Flat Database Structure 903 ..................................................................................... Section 142.8: Designing and understanding how to retrieve realtime data from the Firebase Database 905 ............................................................................................................................................................................. Chapter 143: Image Compression 908 .................................................................................................................... Section 143.1: How to compress image without size change 908 ................................................................................ Chapter 144: Email Validation 911 ........................................................................................................................... Section 144.1: Email address validation 911 ................................................................................................................... Section 144.2: Email Address validation with using Patterns 911 ................................................................................ Chapter 145: Keyboard 912 ......................................................................................................................................... Section 145.1: Register a callback for keyboard open and close 912 ......................................................................... Section 145.2: Hide keyboard when user taps anywhere else on the screen 912 ..................................................... Chapter 146: Button 914 ................................................................................................................................................ Section 146.1: Using the same click event for one or more Views in the XML 914 ..................................................... Section 146.2: Defining external Listener 914 ................................................................................................................ Section 146.3: inline onClickListener 915 ......................................................................................................................... Section 146.4: Customizing Button style 915 .................................................................................................................. Section 146.5: Custom Click Listener to prevent multiple fast clicks 919 .................................................................... Section 146.6: Using the layout to define a click action 919 ........................................................................................ Section 146.7: Listening to the long click events 920 ..................................................................................................... Chapter 147: TextInputLayout 921 ........................................................................................................................... Section 147.1: Basic usage 921 ......................................................................................................................................... Section 147.2: Password Visibility Toggles 921 .............................................................................................................. Section 147.3: Adding Character Counting 921 ............................................................................................................. Section 147.4: Handling Errors 922 ................................................................................................................................. Section 147.5: Customizing the appearance of the TextInputLayout 922 .................................................................. Section 147.6: TextInputEditText 923 .............................................................................................................................. Chapter 148: Bottom Sheets 925 ............................................................................................................................... Section 148.1: Quick Setup 925 ........................................................................................................................................ Section 148.2: BottomSheetBehavior like Google maps 925 ....................................................................................... Section 148.3: Modal bottom sheets with BottomSheetDialog 932 ............................................................................. Section 148.4: Modal bottom sheets with BottomSheetDialogFragment 932 ............................................................ Section 148.5: Persistent Bottom Sheets 932 ................................................................................................................. Section 148.6: Open BottomSheet DialogFragment in Expanded mode by default 933 .......................................... Chapter 149: CoordinatorLayout and Behaviors 935 ..................................................................................... Section 149.1: Creating a simple Behavior 935 .............................................................................................................. Section 149.2: Using the SwipeDismissBehavior 936 ..................................................................................................... Section 149.3: Create dependencies between Views 936 ............................................................................................. Chapter 150: EditText 938 ............................................................................................................................................. Section 150.1: Working with EditTexts 938 ...................................................................................................................... Section 150.2: Customizing the InputType 940 .............................................................................................................. Section 150.3: Icon or button inside Custom Edit Text and its action and click listeners 940 ................................... Section 150.4: Hiding SoftKeyboard 942 ........................................................................................................................