Android Studio Flamingo Essentials. Java Edition

1. Introduction....41 1.1 Downloading the Code Samples....42 1.2 Feedback....42 1.3 Errata....42 2. Setting up an Android Studio Development Environment....43 2.1 System requirements....43 2.2 Downloading the Android Studio package....43 2.3 Installing Android Studio....44 2.3.1 Installation on Windows....44 2.3.2 Installation on macOS....45 2.3.3 Installation on Linux....46 2.4 The Android Studio setup wizard....47 2.5 Installing additional Android SDK packages....48 2.6 Installing the Android SDK Command-line Tools....51 2.6.1 Windows 8.1....53 2.6.2 Windows 10....54 2.6.3 Windows 11....54 2.6.4 Linux....54 2.6.5 macOS....55 2.7 Android Studio memory management....55 2.8 Updating Android Studio and the SDK....57 2.9 Summary....57 3. Creating an Example Android App in Android Studio....58 3.1 About the Project....58 3.2 Creating a New Android Project....58 3.3 Creating an Activity....59 3.4 Defining the Project and SDK Settings....60 3.5 Modifying the Example Application....61 3.6 Modifying the User Interface....62 3.7 Reviewing the Layout and Resource Files....69 3.8 Adding Interaction....73 3.9 Summary....75 4. Creating an Android Virtual Device (AVD) in Android Studio....77 4.1 About Android Virtual Devices....77 4.2 Starting the Emulator....80 4.3 Running the Application in the AVD....81 4.4 Running on Multiple Devices....83 4.5 Stopping a Running Application....83 4.6 Supporting Dark Theme....84 4.7 Running the Emulator in a Separate Window....85 4.8 Enabling the Device Frame....87 4.9 Summary....87 5. Using and Configuring the Android Studio AVD Emulator....89 5.1 The Emulator Environment....89 5.2 Emulator Toolbar Options....89 5.3 Working in Zoom Mode....91 5.4 Resizing the Emulator Window....92 5.5 Extended Control Options....92 5.5.1 Location....92 5.5.2 Displays....93 5.5.3 Cellular....93 5.5.4 Battery....93 5.5.5 Camera....93 5.5.6 Phone....93 5.5.7 Directional Pad....94 5.5.8 Microphone....94 5.5.9 Fingerprint....94 5.5.10 Virtual Sensors....94 5.5.11 Snapshots....94 5.5.12 Record and Playback....95 5.5.13 Google Play....95 5.5.14 Settings....95 5.5.15 Help....95 5.6 Working with Snapshots....95 5.7 Configuring Fingerprint Emulation....97 5.8 The Emulator in Tool Window Mode....98 5.9 Creating a Resizable Emulator....99 5.10 Summary....100 6. A Tour of the Android Studio User Interface....101 6.1 The Welcome Screen....101 6.2 The Main Window....102 6.3 The Tool Windows....104 6.4 Android Studio Keyboard Shortcuts....109 6.5 Switcher and Recent Files Navigation....110 6.6 Changing the Android Studio Theme....111 6.7 Summary....112 7. Testing Android Studio Apps on a Physical Android Device....113 7.1 An Overview of the Android Debug Bridge (ADB)....113 7.2 Enabling USB Debugging ADB on Android Devices....114 7.2.1 macOS ADB Configuration....115 7.2.2 Windows ADB Configuration....116 7.2.3 Linux adb Configuration....117 7.3 Resolving USB Connection Issues....118 7.4 Enabling Wireless Debugging on Android Devices....118 7.5 Testing the adb Connection....121 7.6 Device Mirroring....121 7.7 Summary....121 8. The Basics of the Android Studio Code Editor....123 8.1 The Android Studio Editor....123 8.2 Splitting the Editor Window....127 8.3 Code Completion....128 8.4 Statement Completion....129 8.5 Parameter Information....130 8.6 Parameter Name Hints....130 8.7 Code Generation....131 8.8 Code Folding....132 8.9 Quick Documentation Lookup....134 8.10 Code Reformatting....134 8.11 Finding Sample Code....135 8.12 Live Templates....136 8.13 Summary....137 9. An Overview of the Android Architecture....138 9.1 The Android Software Stack....138 9.2 The Linux Kernel....139 9.3 Android Runtime – ART....140 9.4 Android Libraries....140 9.4.1 C/C++ Libraries....142 9.5 Application Framework....142 9.6 Applications....143 9.7 Summary....144 10. The Anatomy of an Android Application....145 10.1 Android Activities....145 10.2 Android Fragments....146 10.3 Android Intents....147 10.4 Broadcast Intents....147 10.5 Broadcast Receivers....147 10.6 Android Services....148 10.7 Content Providers....148 10.8 The Application Manifest....149 10.9 Application Resources....149 10.10 Application Context....149 10.11 Summary....150 11. An Overview of Android View Binding....151 11.1 Find View by Id....151 11.2 View Binding....152 11.3 Converting the AndroidSample project....152 11.4 Enabling View Binding....152 11.5 Using View Binding....153 11.6 Choosing an Option....155 11.7 View Binding in the Book Examples....155 11.8 Migrating a Project to View Binding....155 11.9 Summary....157 12. Understanding Android Application and Activity Lifecycles....158 12.1 Android Applications and Resource Management....158 12.2 Android Process States....159 12.2.1 Foreground Process....159 12.2.2 Visible Process....160 12.2.3 Service Process....160 12.2.4 Background Process....160 12.2.5 Empty Process....160 12.3 Inter-Process Dependencies....161 12.4 The Activity Lifecycle....161 12.5 The Activity Stack....161 12.6 Activity States....162 12.7 Configuration Changes....163 12.8 Handling State Change....164 12.9 Summary....165 13. Handling Android Activity State Changes....166 13.1 New vs. Old Lifecycle Techniques....166 13.2 The Activity and Fragment Classes....167 13.3 Dynamic State vs. Persistent State....169 13.4 The Android Lifecycle Methods....171 13.5 Lifetimes....173 13.6 Foldable Devices and Multi-Resume....174 13.7 Disabling Configuration Change Restarts....175 13.8 Lifecycle Method Limitations....175 13.9 Summary....176 14. Android Activity State Changes by Example....178 14.1 Creating the State Change Example Project....178 14.2 Designing the User Interface....179 14.3 Overriding the Activity Lifecycle Methods....181 14.4 Filtering the Logcat Panel....184 14.5 Running the Application....186 14.6 Experimenting with the Activity....186 14.7 Summary....188 15. Saving and Restoring the State of an Android Activity....189 15.1 Saving Dynamic State....189 15.2 Default Saving of User Interface State....189 15.3 The Bundle Class....191 15.4 Saving the State....192 15.5 Restoring the State....194 15.6 Testing the Application....195 15.7 Summary....195 16. Understanding Android Views, View Groups and Layouts....197 16.1 Designing for Different Android Devices....197 16.2 Views and View Groups....198 16.3 Android Layout Managers....198 16.4 The View Hierarchy....200 16.5 Creating User Interfaces....202 16.6 Summary....202 17. A Guide to the Android Studio Layout Editor Tool....204 17.1 Basic vs. Empty Views Activity Templates....204 17.2 The Android Studio Layout Editor....210 17.3 Design Mode....210 17.4 The Palette....212 17.5 Design Mode and Layout Views....213 17.6 Night Mode....214 17.7 Code Mode....214 17.8 Split Mode....215 17.9 Setting Attributes....216 17.10 Transforms....218 17.11 Tools Visibility Toggles....218 17.12 Converting Views....221 17.13 Displaying Sample Data....222 17.14 Creating a Custom Device Definition....223 17.15 Changing the Current Device....224 17.16 Layout Validation....224 17.17 Summary....225 18. A Guide to the Android ConstraintLayout....227 18.1 How ConstraintLayout Works....227 18.1.1 Constraints....228 18.1.2 Margins....228 18.1.3 Opposing Constraints....229 18.1.4 Constraint Bias....230 18.1.5 Chains....231 18.1.6 Chain Styles....232 18.2 Baseline Alignment....233 18.3 Configuring Widget Dimensions....233 18.4 Guideline Helper....234 18.5 Group Helper....234 18.6 Barrier Helper....235 18.7 Flow Helper....237 18.8 Ratios....238 18.9 ConstraintLayout Advantages....239 18.10 ConstraintLayout Availability....239 18.11 Summary....239 19. A Guide to Using ConstraintLayout in Android Studio....241 19.1 Design and Layout Views....241 19.2 Autoconnect Mode....243 19.3 Inference Mode....243 19.4 Manipulating Constraints Manually....244 19.5 Adding Constraints in the Inspector....246 19.6 Viewing Constraints in the Attributes Window....246 19.7 Deleting Constraints....247 19.8 Adjusting Constraint Bias....248 19.9 Understanding ConstraintLayout Margins....248 19.10 The Importance of Opposing Constraints and Bias....250 19.11 Configuring Widget Dimensions....252 19.12 Design Time Tools Positioning....254 19.13 Adding Guidelines....255 19.14 Adding Barriers....257 19.15 Adding a Group....259 19.16 Working with the Flow Helper....260 19.17 Widget Group Alignment and Distribution....261 19.18 Converting other Layouts to ConstraintLayout....262 19.19 Summary....263 20. Working with ConstraintLayout Chains and Ratios in Android Studio....264 20.1 Creating a Chain....264 20.2 Changing the Chain Style....267 20.3 Spread Inside Chain Style....267 20.4 Packed Chain Style....268 20.5 Packed Chain Style with Bias....268 20.6 Weighted Chain....268 20.7 Working with Ratios....270 20.8 Summary....272 21. An Android Studio Layout Editor ConstraintLayout Tutorial....273 21.1 An Android Studio Layout Editor Tool Example....273 21.2 Preparing the Layout Editor Environment....273 21.3 Adding the Widgets to the User Interface....275 21.4 Adding the Constraints....278 21.5 Testing the Layout....280 21.6 Using the Layout Inspector....281 21.7 Summary....282 22. Manual XML Layout Design in Android Studio....283 22.1 Manually Creating an XML Layout....283 22.2 Manual XML vs. Visual Layout Design....287 22.3 Summary....288 23. Managing Constraints using Constraint Sets....289 23.1 Java Code vs. XML Layout Files....289 23.2 Creating Views....290 23.3 View Attributes....291 23.4 Constraint Sets....291 23.4.1 Establishing Connections....292 23.4.2 Applying Constraints to a Layout....292 23.4.3 Parent Constraint Connections....292 23.4.4 Sizing Constraints....292 23.4.5 Constraint Bias....293 23.4.6 Alignment Constraints....293 23.4.7 Copying and Applying Constraint Sets....293 23.4.8 ConstraintLayout Chains....294 23.4.9 Guidelines....295 23.4.10 Removing Constraints....295 23.4.11 Scaling....295 23.4.12 Rotation....296 23.5 Summary....296 24. An Android ConstraintSet Tutorial....298 24.1 Creating the Example Project in Android Studio....298 24.2 Adding Views to an Activity....298 24.3 Setting View Attributes....300 24.4 Creating View IDs....301 24.5 Configuring the Constraint Set....302 24.6 Adding the EditText View....304 24.7 Converting Density Independent Pixels (dp) to Pixels (px)....306 24.8 Summary....307 25. A Guide to using Apply Changes in Android Studio....308 25.1 Introducing Apply Changes....308 25.2 Understanding Apply Changes Options....309 25.3 Using Apply Changes....309 25.4 Configuring Apply Changes Fallback Settings....311 25.5 An Apply Changes Tutorial....311 25.6 Using Apply Code Changes....312 25.7 Using Apply Changes and Restart Activity....313 25.8 Using Run App....313 25.9 Summary....314 26. An Overview and Example of Android Event Handling....315 26.1 Understanding Android Events....315 26.2 Using the android:onClick Resource....316 26.3 Event Listeners and Callback Methods....317 26.4 An Event Handling Example....318 26.5 Designing the User Interface....318 26.6 The Event Listener and Callback Method....319 26.7 Consuming Events....322 26.8 Summary....324 27. Android Touch and Multi-touch Event Handling....325 27.1 Intercepting Touch Events....325 27.2 The MotionEvent Object....326 27.3 Understanding Touch Actions....326 27.4 Handling Multiple Touches....327 27.5 An Example Multi-Touch Application....328 27.6 Designing the Activity User Interface....328 27.7 Implementing the Touch Event Listener....329 27.8 Running the Example Application....333 27.9 Summary....334 28. Detecting Common Gestures Using the Android Gesture Detector Class....336 28.1 Implementing Common Gesture Detection....336 28.2 Creating an Example Gesture Detection Project....338 28.3 Implementing the Listener Class....338 28.4 Creating the GestureDetectorCompat Instance....341 28.5 Implementing the onTouchEvent() Method....342 28.6 Testing the Application....343 28.7 Summary....343 29. Implementing Custom Gesture and Pinch Recognition on Android....345 29.1 The Android Gesture Builder Application....345 29.2 The GestureOverlayView Class....345 29.3 Detecting Gestures....346 29.4 Identifying Specific Gestures....346 29.5 Installing and Running the Gesture Builder Application....346 29.6 Creating a Gestures File....347 29.7 Creating the Example Project....347 29.8 Extracting the Gestures File from the SD Card....348 29.9 Adding the Gestures File to the Project....349 29.10 Designing the User Interface....349 29.11 Loading the Gestures File....350 29.12 Registering the Event Listener....352 29.13 Implementing the onGesturePerformed Method....352 29.14 Testing the Application....354 29.15 Configuring the GestureOverlayView....354 29.16 Intercepting Gestures....355 29.17 Detecting Pinch Gestures....355 29.18 A Pinch Gesture Example Project....356 29.19 Summary....359 30. An Introduction to Android Fragments....361 30.1 What is a Fragment?....361 30.2 Creating a Fragment....362 30.3 Adding a Fragment to an Activity using the Layout XML File....363 30.4 Adding and Managing Fragments in Code....365 30.5 Handling Fragment Events....367 30.6 Implementing Fragment Communication....368 30.7 Summary....370 31. Using Fragments in Android Studio - An Example....372 31.1 About the Example Fragment Application....372 31.2 Creating the Example Project....373 31.3 Creating the First Fragment Layout....373 31.4 Migrating a Fragment to View Binding....375 31.5 Adding the Second Fragment....376 31.6 Adding the Fragments to the Activity....378 31.7 Making the Toolbar Fragment Talk to the Activity....380 31.8 Making the Activity Talk to the Text Fragment....384 31.9 Testing the Application....385 31.10 Summary....386 32. Modern Android App Architecture with Jetpack....387 32.1 What is Android Jetpack?....387 32.2 The “Old” Architecture....388 32.3 Modern Android Architecture....388 32.4 The ViewModel Component....388 32.5 The LiveData Component....389 32.6 ViewModel Saved State....391 32.7 LiveData and Data Binding....392 32.8 Android Lifecycles....393 32.9 Repository Modules....393 32.10 Summary....394 33. An Android ViewModel Tutorial....396 33.1 About the Project....396 33.2 Creating the ViewModel Example Project....396 33.3 Removing Unwanted Project Elements....397 33.4 Designing the Fragment Layout....398 33.5 Implementing the View Model....400 33.6 Associating the Fragment with the View Model....401 33.7 Modifying the Fragment....402 33.8 Accessing the ViewModel Data....403 33.9 Testing the Project....404 33.10 Summary....405 34. An Android Jetpack LiveData Tutorial....406 34.1 LiveData - A Recap....406 34.2 Adding LiveData to the ViewModel....406 34.3 Implementing the Observer....409 34.4 Summary....412 35. An Overview of Android Jetpack Data Binding....413 35.1 An Overview of Data Binding....413 35.2 The Key Components of Data Binding....414 35.2.1 The Project Build Configuration....414 35.2.2 The Data Binding Layout File....415 35.2.3 The Layout File Data Element....416 35.2.4 The Binding Classes....417 35.2.5 Data Binding Variable Configuration....419 35.2.6 Binding Expressions (One-Way)....419 35.2.7 Binding Expressions (Two-Way)....422 35.2.8 Event and Listener Bindings....422 35.3 Summary....423 36. An Android Jetpack Data Binding Tutorial....424 36.1 Removing the Redundant Code....424 36.2 Enabling Data Binding....426 36.3 Adding the Layout Element....427 36.4 Adding the Data Element to Layout File....429 36.5 Working with the Binding Class....429 36.6 Assigning the ViewModel Instance to the Data Binding Variable....431 36.7 Adding Binding Expressions....431 36.8 Adding the Conversion Method....433 36.9 Adding a Listener Binding....434 36.10 Testing the App....434 36.11 Summary....434 37. An Android ViewModel Saved State Tutorial....436 37.1 Understanding ViewModel State Saving....436 37.2 Implementing ViewModel State Saving....437 37.3 Saving and Restoring State....439 37.4 Adding Saved State Support to the ViewModelDemo Project....440 37.5 Summary....443 38. Working with Android Lifecycle-Aware Components....444 38.1 Lifecycle Awareness....444 38.2 Lifecycle Owners....445 38.3 Lifecycle Observers....446 38.4 Lifecycle States and Events....447 38.5 Summary....448 39. An Android Jetpack Lifecycle Awareness Tutorial....449 39.1 Creating the Example Lifecycle Project....449 39.2 Creating a Lifecycle Observer....449 39.3 Adding the Observer....451 39.4 Testing the Observer....452 39.5 Creating a Lifecycle Owner....453 39.6 Testing the Custom Lifecycle Owner....456 39.7 Summary....456 40. An Overview of the Navigation Architecture Component....457 40.1 Understanding Navigation....457 40.2 Declaring a Navigation Host....459 40.3 The Navigation Graph....461 40.4 Accessing the Navigation Controller....463 40.5 Triggering a Navigation Action....464 40.6 Passing Arguments....464 40.7 Summary....465 41. An Android Jetpack Navigation Component Tutorial....467 41.1 Creating the NavigationDemo Project....467 41.2 Adding Navigation to the Build Configuration....467 41.3 Creating the Navigation Graph Resource File....468 41.4 Declaring a Navigation Host....470 41.5 Adding Navigation Destinations....472 41.6 Designing the Destination Fragment Layouts....474 41.7 Adding an Action to the Navigation Graph....475 41.8 Implement the OnFragmentInteractionListener....477 41.9 Adding View Binding Support to the Destination Fragments....479 41.10 Triggering the Action....480 41.11 Passing Data Using Safeargs....481 41.12 Summary....486 42. An Introduction to MotionLayout....487 42.1 An Overview of MotionLayout....487 42.2 MotionLayout....488 42.3 MotionScene....488 42.4 Configuring ConstraintSets....490 42.5 Custom Attributes....491 42.6 Triggering an Animation....493 42.7 Arc Motion....494 42.8 Keyframes....495 42.8.1 Attribute Keyframes....496 42.8.2 Position Keyframes....496 42.9 Time Linearity....500 42.10 KeyTrigger....501 42.11 Cycle and Time Cycle Keyframes....502 42.12 Starting an Animation from Code....502 42.13 Summary....503 43. An Android MotionLayout Editor Tutorial....505 43.1 Creating the MotionLayoutDemo Project....505 43.2 ConstraintLayout to MotionLayout Conversion....505 43.3 Configuring Start and End Constraints....507 43.4 Previewing the MotionLayout Animation....511 43.5 Adding an OnClick Gesture....511 43.6 Adding an Attribute Keyframe to the Transition....513 43.7 Adding a CustomAttribute to a Transition....516 43.8 Adding Position Keyframes....518 43.9 Summary....521 44. A MotionLayout KeyCycle Tutorial....522 44.1 An Overview of Cycle Keyframes....522 44.2 Using the Cycle Editor....526 44.3 Creating the KeyCycleDemo Project....527 44.4 Configuring the Start and End Constraints....528 44.5 Creating the Cycles....530 44.6 Previewing the Animation....532 44.7 Adding the KeyFrameSet to the MotionScene....532 44.8 Summary....535 45. Working with the Floating Action Button and Snackbar....536 45.1 The Material Design....536 45.2 The Design Library....537 45.3 The Floating Action Button (FAB)....537 45.4 The Snackbar....538 45.5 Creating the Example Project....539 45.6 Reviewing the Project....539 45.7 Removing Navigation Features....541 45.8 Changing the Floating Action Button....542 45.9 Adding an Action to the Snackbar....544 45.10 Summary....545 46. Creating a Tabbed Interface using the TabLayout Component....546 46.1 An Introduction to the ViewPager2....546 46.2 An Overview of the TabLayout Component....546 46.3 Creating the TabLayoutDemo Project....547 46.4 Creating the First Fragment....549 46.5 Duplicating the Fragments....550 46.6 Adding the TabLayout and ViewPager2....552 46.7 Performing the Initialization Tasks....555 46.8 Testing the Application....557 46.9 Customizing the TabLayout....558 46.10 Summary....560 47. Working with the RecyclerView and CardView Widgets....561 47.1 An Overview of the RecyclerView....561 47.2 An Overview of the CardView....564 47.3 Summary....566 48. An Android RecyclerView and CardView Tutorial....567 48.1 Creating the CardDemo Project....567 48.2 Modifying the Basic Views Activity Project....567 48.3 Designing the CardView Layout....568 48.4 Adding the RecyclerView....570 48.5 Adding the Image Files....571 48.6 Creating the RecyclerView Adapter....571 48.7 Initializing the RecyclerView Component....574 48.8 Testing the Application....576 48.9 Responding to Card Selections....577 48.10 Summary....579 49. A Layout Editor Sample Data Tutorial....580 49.1 Adding Sample Data to a Project....580 49.2 Using Custom Sample Data....585 49.3 Summary....589 50. Working with the AppBar and Collapsing Toolbar Layouts....590 50.1 The Anatomy of an AppBar....590 50.2 The Example Project....591 50.3 Coordinating the RecyclerView and Toolbar....592 50.4 Introducing the Collapsing Toolbar Layout....594 50.5 Changing the Title and Scrim Color....599 50.6 Summary....600 51. An Android Studio Primary/Detail Flow Tutorial....601 51.1 The Primary/Detail Flow....601 51.2 Creating a Primary/Detail Flow Activity....602 51.3 Adding the Primary/Detail Flow Activity....603 51.4 Modifying the Primary/Detail Flow Template....604 51.5 Changing the Content Model....604 51.6 Changing the Detail Pane....606 51.7 Modifying the ItemDetailFragment Class....608 51.8 Modifying the ItemListFragment Class....609 51.9 Adding Manifest Permissions....610 51.10 Running the Application....611 51.11 Summary....612 52. An Overview of Android Services....613 52.1 Intent Service....613 52.2 Bound Service....614 52.3 The Anatomy of a Service....615 52.4 Controlling Destroyed Service Restart Options....616 52.5 Declaring a Service in the Manifest File....616 52.6 Starting a Service Running on System Startup....618 52.7 Summary....618 53. An Overview of Android Intents....620 53.1 An Overview of Intents....620 53.2 Explicit Intents....621 53.3 Returning Data from an Activity....623 53.4 Implicit Intents....624 53.5 Using Intent Filters....625 53.6 Automatic Link Verification....626 53.7 Manually Enabling Links....630 53.8 Checking Intent Availability....631 53.9 Summary....632 54. Android Explicit Intents – A Worked Example....634 54.1 Creating the Explicit Intent Example Application....634 54.2 Designing the User Interface Layout for MainActivity....634 54.3 Creating the Second Activity Class....636 54.4 Designing the User Interface Layout for SecondActivity....636 54.5 Reviewing the Application Manifest File....637 54.6 Creating the Intent....638 54.7 Extracting Intent Data....640 54.8 Launching SecondActivity as a Sub-Activity....641 54.9 Returning Data from a Sub-Activity....643 54.10 Testing the Application....643 54.11 Summary....644 55. Android Implicit Intents – A Worked Example....645 55.1 Creating the Android Studio Implicit Intent Example Project....645 55.2 Designing the User Interface....645 55.3 Creating the Implicit Intent....646 55.4 Adding a Second Matching Activity....648 55.5 Adding the Web View to the UI....648 55.6 Obtaining the Intent URL....649 55.7 Modifying the MyWebView Project Manifest File....651 55.8 Installing the MyWebView Package on a Device....653 55.9 Testing the Application....654 55.10 Manually Enabling the Link....654 55.11 Automatic Link Verification....656 55.12 Summary....658 56. Android Broadcast Intents and Broadcast Receivers....659 56.1 An Overview of Broadcast Intents....659 56.2 An Overview of Broadcast Receivers....660 56.3 Obtaining Results from a Broadcast....663 56.4 Sticky Broadcast Intents....663 56.5 The Broadcast Intent Example....664 56.6 Creating the Example Application....664 56.7 Creating and Sending the Broadcast Intent....664 56.8 Creating the Broadcast Receiver....665 56.9 Registering the Broadcast Receiver....667 56.10 Testing the Broadcast Example....668 56.11 Listening for System Broadcasts....669 56.12 Summary....670 57. Android Local Bound Services – A Worked Example....671 57.1 Understanding Bound Services....671 57.2 Bound Service Interaction Options....671 57.3 A Local Bound Service Example....672 57.4 Adding a Bound Service to the Project....673 57.5 Implementing the Binder....673 57.6 Binding the Client to the Service....677 57.7 Completing the Example....679 57.8 Testing the Application....681 57.9 Summary....681 58. Android Remote Bound Services – A Worked Example....682 58.1 Client to Remote Service Communication....682 58.2 Creating the Example Application....683 58.3 Designing the User Interface....683 58.4 Implementing the Remote Bound Service....683 58.5 Configuring a Remote Service in the Manifest File....685 58.6 Launching and Binding to the Remote Service....687 58.7 Sending a Message to the Remote Service....689 58.8 Summary....689 59. A Basic Overview of Java Threads, Handlers and Executors....691 59.1 The Application Main Thread....691 59.2 Thread Handlers....691 59.3 A Threading Example....692 59.4 Building the App....692 59.5 Creating a New Thread....694 59.6 Implementing a Thread Handler....696 59.7 Passing a Message to the Handler....698 59.8 Java Executor Concurrency....699 59.9 Working with Runnable Tasks....700 59.10 Shutting down an Executor Service....702 59.11 Working with Callable Tasks and Futures....702 59.12 Handling a Future Result....704 59.13 Scheduling Tasks....706 59.14 Summary....707 60. Making Runtime Permission Requests in Android....708 60.1 Understanding Normal and Dangerous Permissions....708 60.2 Creating the Permissions Example Project....711 60.3 Checking for a Permission....711 60.4 Requesting Permission at Runtime....714 60.5 Providing a Rationale for the Permission Request....716 60.6 Testing the Permissions App....718 60.7 Summary....719 61. An Android Notifications Tutorial....720 61.1 An Overview of Notifications....720 61.2 Creating the NotifyDemo Project....722 61.3 Designing the User Interface....722 61.4 Creating the Second Activity....723 61.5 Creating a Notification Channel....724 61.6 Requesting Notification Permission....726 61.7 Creating and Issuing a Notification....730 61.8 Launching an Activity from a Notification....733 61.9 Adding Actions to a Notification....735 61.10 Bundled Notifications....737 61.11 Summary....739 62. An Android Direct Reply Notification Tutorial....741 62.1 Creating the DirectReply Project....741 62.2 Designing the User Interface....741 62.3 Requesting Notification Permission....742 62.4 Creating the Notification Channel....744 62.5 Building the RemoteInput Object....746 62.6 Creating the PendingIntent....748 62.7 Creating the Reply Action....748 62.8 Receiving Direct Reply Input....752 62.9 Updating the Notification....753 62.10 Summary....755 63. Foldable Devices and Multi-Window Support....756 63.1 Foldables and Multi-Window Support....756 63.2 Using a Foldable Emulator....757 63.3 Entering Multi-Window Mode....758 63.4 Enabling and using Freeform Support....759 63.5 Checking for Freeform Support....760 63.6 Enabling Multi-Window Support in an App....761 63.7 Specifying Multi-Window Attributes....761 63.8 Detecting Multi-Window Mode in an Activity....763 63.9 Receiving Multi-Window Notifications....763 63.10 Launching an Activity in Multi-Window Mode....764 63.11 Configuring Freeform Activity Size and Position....765 63.12 Summary....766 64. An Overview of Android SQLite Databases....768 64.1 Understanding Database Tables....768 64.2 Introducing Database Schema....769 64.3 Columns and Data Types....769 64.4 Database Rows....769 64.5 Introducing Primary Keys....770 64.6 What is SQLite?....770 64.7 Structured Query Language (SQL)....771 64.8 Trying SQLite on an Android Virtual Device (AVD)....772 64.9 The Android Room Persistence Library....775 64.10 Summary....775 65. The Android Room Persistence Library....777 65.1 Revisiting Modern App Architecture....777 65.2 Key Elements of Room Database Persistence....778 65.2.1 Repository....778 65.2.2 Room Database....778 65.2.3 Data Access Object (DAO)....778 65.2.4 Entities....778 65.2.5 SQLite Database....779 65.3 Understanding Entities....780 65.4 Data Access Objects....784 65.5 The Room Database....786 65.6 The Repository....787 65.7 In-Memory Databases....789 65.8 Database Inspector....789 65.9 Summary....790 66. An Android TableLayout and TableRow Tutorial....791 66.1 The TableLayout and TableRow Layout Views....791 66.2 Creating the Room Database Project....793 66.3 Converting to a LinearLayout....793 66.4 Adding the TableLayout to the User Interface....794 66.5 Configuring the TableRows....795 66.6 Adding the Button Bar to the Layout....796 66.7 Adding the RecyclerView....797 66.8 Adjusting the Layout Margins....798 66.9 Summary....798 67. An Android Room Database and Repository Tutorial....800 67.1 About the RoomDemo Project....800 67.2 Modifying the Build Configuration....800 67.3 Building the Entity....801 67.4 Creating the Data Access Object....803 67.5 Adding the Room Database....805 67.6 Adding the Repository....806 67.7 Adding the ViewModel....810 67.8 Creating the Product Item Layout....812 67.9 Adding the RecyclerView Adapter....813 67.10 Preparing the Main Activity....815 67.11 Adding the Button Listeners....816 67.12 Adding LiveData Observers....817 67.13 Initializing the RecyclerView....819 67.14 Testing the RoomDemo App....819 67.15 Using the Database Inspector....820 67.16 Summary....821 68. Accessing Cloud Storage using the Android Storage Access Framework....822 68.1 The Storage Access Framework....822 68.2 Working with the Storage Access Framework....823 68.3 Filtering Picker File Listings....824 68.4 Handling Intent Results....825 68.5 Reading the Content of a File....826 68.6 Writing Content to a File....827 68.7 Deleting a File....828 68.8 Gaining Persistent Access to a File....828 68.9 Summary....829 69. An Android Storage Access Framework Example....831 69.1 About the Storage Access Framework Example....831 69.2 Creating the Storage Access Framework Example....831 69.3 Designing the User Interface....832 69.4 Adding the Activity Launchers....833 69.5 Creating a New Storage File....835 69.6 Saving to a Storage File....836 69.7 Opening and Reading a Storage File....838 69.8 Testing the Storage Access Application....840 69.9 Summary....842 70. Video Playback on Android using the VideoView and MediaController Classes....843 70.1 Introducing the Android VideoView Class....843 70.2 Introducing the Android MediaController Class....844 70.3 Creating the Video Playback Example....845 70.4 Designing the VideoPlayer Layout....846 70.5 Downloading the Video File....846 70.6 Configuring the VideoView....847 70.7 Adding the MediaController to the Video View....849 70.8 Setting up the onPreparedListener....850 70.9 Summary....851 71. Android Picture-in-Picture Mode....852 71.1 Picture-in-Picture Features....852 71.2 Enabling Picture-in-Picture Mode....853 71.3 Configuring Picture-in-Picture Parameters....854 71.4 Entering Picture-in-Picture Mode....855 71.5 Detecting Picture-in-Picture Mode Changes....855 71.6 Adding Picture-in-Picture Actions....856 71.7 Summary....857 72. An Android Picture-in-Picture Tutorial....859 72.1 Adding Picture-in-Picture Support to the Manifest....859 72.2 Adding a Picture-in-Picture Button....859 72.3 Entering Picture-in-Picture Mode....860 72.4 Detecting Picture-in-Picture Mode Changes....862 72.5 Adding a Broadcast Receiver....863 72.6 Adding the PiP Action....865 72.7 Testing the Picture-in-Picture Action....868 72.8 Summary....869 73. Android Audio Recording and Playback using MediaPlayer and MediaRecorder....870 73.1 Playing Audio....870 73.2 Recording Audio and Video using the MediaRecorder Class....871 73.3 About the Example Project....873 73.4 Creating the AudioApp Project....874 73.5 Designing the User Interface....874 73.6 Checking for Microphone Availability....875 73.7 Initializing the Activity....876 73.8 Implementing the recordAudio() Method....878 73.9 Implementing the stopAudio() Method....878 73.10 Implementing the playAudio() method....879 73.11 Configuring and Requesting Permissions....880 73.12 Testing the Application....883 73.13 Summary....883 74. Working with the Google Maps Android API in Android Studio....885 74.1 The Elements of the Google Maps Android API....885 74.2 Creating the Google Maps Project....887 74.3 Creating a Google Cloud Billing Account....888 74.4 Creating a New Google Cloud Project....888 74.5 Enabling the Google Maps SDK....890 74.6 Generating a Google Maps API Key....891 74.7 Adding the API Key to the Android Studio Project....891 74.8 Testing the Application....892 74.9 Understanding Geocoding and Reverse Geocoding....893 74.10 Adding a Map to an Application....895 74.11 Requesting Current Location Permission....896 74.12 Displaying the User’s Current Location....898 74.13 Changing the Map Type....900 74.14 Displaying Map Controls to the User....901 74.15 Handling Map Gesture Interaction....902 74.15.1 Map Zooming Gestures....902 74.15.2 Map Scrolling/Panning Gestures....903 74.15.3 Map Tilt Gestures....903 74.15.4 Map Rotation Gestures....904 74.16 Creating Map Markers....904 74.17 Controlling the Map Camera....905 74.18 Summary....908 75. Printing with the Android Printing Framework....909 75.1 The Android Printing Architecture....909 75.2 The Print Service Plugins....909 75.3 Google Cloud Print....910 75.4 Printing to Google Drive....911 75.5 Save as PDF....911 75.6 Printing from Android Devices....912 75.7 Options for Building Print Support into Android Apps....913 75.7.1 Image Printing....913 75.7.2 Creating and Printing HTML Content....914 75.7.3 Printing a Web Page....917 75.7.4 Printing a Custom Document....918 75.8 Summary....919 76. An Android HTML and Web Content Printing Example....920 76.1 Creating the HTML Printing Example Application....920 76.2 Printing Dynamic HTML Content....920 76.3 Creating the Web Page Printing Example....924 76.4 Removing the Floating Action Button....924 76.5 Removing Navigation Features....925 76.6 Designing the User Interface Layout....927 76.7 Accessing the WebView from the Main Activity....928 76.8 Loading the Web Page into the WebView....929 76.9 Adding the Print Menu Option....930 76.10 Summary....933 77. A Guide to Android Custom Document Printing....934 77.1 An Overview of Android Custom Document Printing....934 77.1.1 Custom Print Adapters....935 77.2 Preparing the Custom Document Printing Project....936 77.3 Creating the Custom Print Adapter....937 77.4 Implementing the onLayout() Callback Method....939 77.5 Implementing the onWrite() Callback Method....943 77.6 Checking a Page is in Range....947 77.7 Drawing the Content on the Page Canvas....948 77.8 Starting the Print Job....951 77.9 Testing the Application....952 77.10 Summary....953 78. An Introduction to Android App Links....954 78.1 An Overview of Android App Links....954 78.2 App Link Intent Filters....955 78.3 Handling App Link Intents....956 78.4 Associating the App with a Website....957 78.5 Summary....957 79. An Android Studio App Links Tutorial....958 79.1 About the Example App....958 79.2 The Database Schema....959 79.3 Loading and Running the Project....959 79.4 Adding the URL Mapping....961 79.5 Adding the Intent Filter....964 79.6 Adding Intent Handling Code....965 79.7 Testing the App....969 79.8 Creating the Digital Asset Links File....969 79.9 Testing the App Link....970 79.10 Summary....971 80. An Android Biometric Authentication Tutorial....972 80.1 An Overview of Biometric Authentication....972 80.2 Creating the Biometric Authentication Project....973 80.3 Configuring Device Fingerprint Authentication....973 80.4 Adding the Biometric Permission to the Manifest File....974 80.5 Designing the User Interface....975 80.6 Adding a Toast Convenience Method....975 80.7 Checking the Security Settings....976 80.8 Configuring the Authentication Callbacks....978 80.9 Adding the CancellationSignal....979 80.10 Starting the Biometric Prompt....980 80.11 Testing the Project....981 80.12 Summary....983 81. Creating, Testing and Uploading an Android App Bundle....984 81.1 The Release Preparation Process....984 81.2 Android App Bundles....984 81.3 Register for a Google Play Developer Console Account....986 81.4 Configuring the App in the Console....987 81.5 Enabling Google Play App Signing....988 81.6 Creating a Keystore File....989 81.7 Creating the Android App Bundle....991 81.8 Generating Test APK Files....993 81.9 Uploading the App Bundle to the Google Play Developer Console....995 81.10 Exploring the App Bundle....996 81.11 Managing Testers....997 81.12 Rolling the App Out for Testing....997 81.13 Uploading New App Bundle Revisions....998 81.14 Analyzing the App Bundle File....999 81.15 Summary....1000 82. An Overview of Android In-App Billing....1001 82.1 Preparing a Project for In-App Purchasing....1001 82.2 Creating In-App Products and Subscriptions....1002 82.3 Billing Client Initialization....1003 82.4 Connecting to the Google Play Billing Library....1004 82.5 Querying Available Products....1005 82.6 Starting the Purchase Process....1006 82.7 Completing the Purchase....1007 82.8 Querying Previous Purchases....1009 82.9 Summary....1010 83. An Android In-App Purchasing Tutorial....1011 83.1 About the In-App Purchasing Example Project....1011 83.2 Creating the InAppPurchase Project....1011 83.3 Adding Libraries to the Project....1012 83.4 Designing the User Interface....1012 83.5 Adding the App to the Google Play Store....1013 83.6 Creating an In-App Product....1014 83.7 Enabling License Testers....1015 83.8 Initializing the Billing Client....1015 83.9 Querying the Product....1018 83.10 Launching the Purchase Flow....1019 83.11 Handling Purchase Updates....1020 83.12 Consuming the Product....1021 83.13 Restoring a Previous Purchase....1022 83.14 Testing the App....1024 83.15 Troubleshooting....1026 83.16 Summary....1027 84. An Overview of Android Dynamic Feature Modules....1028 84.1 An Overview of Dynamic Feature Modules....1028 84.2 Dynamic Feature Module Architecture....1029 84.3 Creating a Dynamic Feature Module....1031 84.4 Converting an Existing Module for Dynamic Delivery....1033 84.5 Working with Dynamic Feature Modules....1036 84.6 Handling Large Dynamic Feature Modules....1039 84.7 Summary....1041 85. An Android Studio Dynamic Feature Tutorial....1042 85.1 Creating the DynamicFeature Project....1042 85.2 Adding Dynamic Feature Support to the Project....1042 85.3 Designing the Base Activity User Interface....1044 85.4 Adding the Dynamic Feature Module....1045 85.5 Reviewing the Dynamic Feature Module....1046 85.6 Adding the Dynamic Feature Activity....1049 85.7 Implementing the launchIntent() Method....1052 85.8 Uploading the App Bundle for Testing....1054 85.9 Implementing the installFeature() Method....1055 85.10 Adding the Update Listener....1058 85.11 Using Deferred Installation....1062 85.12 Removing a Dynamic Module....1063 85.13 Summary....1063 86. Working with Material Design 3 Theming....1064 86.1 Material Design 2 vs Material Design 3....1064 86.2 Understanding Material Design Theming....1064 86.3 Material Design 3 Theming....1065 86.4 Building a Custom Theme....1068 86.5 Summary....1069 87. A Material Design 3 Theming and Dynamic Color Tutorial....1070 87.1 Creating the ThemeDemo Project....1070 87.2 Designing the User Interface....1070 87.3 Building a New Theme....1072 87.4 Adding the Theme to the Project....1073 87.5 Enabling Dynamic Color Support....1075 87.6 Previewing Dynamic Colors....1077 87.7 Summary....1078 88. An Overview of Gradle in Android Studio....1079 88.1 An Overview of Gradle....1079 88.2 Gradle and Android Studio....1080 88.2.1 Sensible Defaults....1080 88.2.2 Dependencies....1080 88.2.3 Build Variants....1081 88.2.4 Manifest Entries....1081 88.2.5 APK Signing....1081 88.2.6 ProGuard Support....1082 88.3 The Property and Settings Gradle Build File....1082 88.4 The Top-level Gradle Build File....1083 88.5 Module Level Gradle Build Files....1084 88.6 Configuring Signing Settings in the Build File....1087 88.7 Running Gradle Tasks from the Command-line....1089 88.8 Summary....1090 Index....1091