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

Fully updated for Android Studio Flamingo, this book aims to teach you how to develop Android-based applications using the Java programming language.This book begins with the basics and outlines how to set up an Android development and testing environment, followed by an overview of areas such as tool windows, the code editor, and the Layout Editor tool. An introduction to the architecture of Android is followed by an in-depth look at the design of Android applications and user interfaces using the Android Studio environment.Chapters are also included covering the Android Architecture Components, including view models, lifecycle management, Room database access, the Database Inspector, app navigation, live data, and data binding.More advanced topics such as intents are also covered, as are touch screen handling, gesture recognition, and the recording and playback of audio. This book edition also covers printing, transitions, and foldable device support.The concepts of material design are also covered in detail, including the use of floating action buttons, Snackbars, tabbed interfaces, card views, navigation drawers, and collapsing toolbars.Other key features of Android Studio and Android are also covered in detail, including the Layout Editor, the ConstraintLayout and ConstraintSet classes, MotionLayout Editor, view binding, constraint chains, barriers, and direct reply notifications.Chapters also cover advanced features of Android Studio, such as App Links, Dynamic Delivery, Gradle build configuration, in-app billing, and submitting apps to the Google Play Developer Console.Assuming you already have some Java programming experience, are ready to download Android Studio and the Android SDK, have access to a Windows, Mac, or Linux system, and have ideas for some apps to develop, you are ready to get started.