Android Studio开发基础教程：第二版

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"Android Studio Essentials Preview" 是一本深入讲解使用Android Studio集成开发环境（Integrated Development Environment, IDE）和Android 5软件开发套件（Software Development Kit, SDK）开发Android应用程序的专业教程。该书由Neil Smyth撰写，专为个人学习设计，未经授权的复制和分发是严格禁止的。书中内容仅为信息参考，作者和出版商不对其中信息的准确性提供任何形式的担保，也不承担因错误或遗漏导致的任何损失或损害。本书的核心目标在于教授读者掌握在Android Studio环境下进行应用开发所必需的技术。首先，章节1的"Introduction"引导读者下载代码样本并鼓励提供反馈和报告可能存在的错误（Errata）。接着，第2章详细介绍了如何设置Android Studio开发环境，包括系统需求、Java Development Kit (JDK) 的安装步骤。对于Windows用户，章节2.2.1讲述了Windows JDK的安装方法，确保读者了解如何正确配置JDK以支持Android Studio的运行。而在MacOS X系统上（2.2.2），作者提供了针对苹果操作系统的具体安装指导。对于Linux用户，第2.3节则覆盖了Linux平台上的JDK安装过程，以确保跨平台开发的一致性。此外，书中还包含了商标合规使用的信息，强调了书中提到的商标仅用于编辑目的，并尊重各商标所有者的权益。修订版本2.0i表明作者对内容进行了更新和改进，确保读者能够获得最新、最准确的Android Studio开发指南。通过阅读这本书，读者不仅能掌握Android Studio的基本操作，还能深入理解如何利用其功能进行高效的应用开发，无论是初学者还是经验丰富的开发者都能从中获益匪浅。不过，由于版权和使用限制，所有内容只能供个人学习参考，商业用途必须得到作者的明确许可。

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29. An Android Transition Tutorial using beginDelayedTransition ..................................................................................................... 225

29.1 Creating the Android Studio TransitionDemo Project ............................................................................................................... 225

29.2 Preparing the Project Files ......................................................................................................................................................... 225

29.3 Implementing beginDelayedTransition Animation .................................................................................................................... 225

29.4 Customizing the Transition ........................................................................................................................................................ 228

29.5 Summary .................................................................................................................................................................................... 229

30. Implementing Android Scene Transitions – A Tutorial .................................................................................................................. 231

30.1 An Overview of the Scene Transition Project ............................................................................................................................ 231

30.2 Creating the Android Studio SceneTransitions Project.............................................................................................................. 231

30.3 Identifying and Preparing the Root Container........................................................................................................................... 231

30.4 Designing the First Scene ........................................................................................................................................................... 231

30.5 Designing the Second Scene ...................................................................................................................................................... 234

30.6 Entering the First Scene ............................................................................................................................................................. 235

30.7 Loading Scene 2 ......................................................................................................................................................................... 236

30.8 Implementing the Transitions.................................................................................................................................................... 236

30.9 Adding the Transition File .......................................................................................................................................................... 237

30.10 Loading and Using the Transition Set ...................................................................................................................................... 237

30.11 Configuring Additional Transitions .......................................................................................................................................... 238

30.12 Summary .................................................................................................................................................................................. 239

31. An Overview of Android Intents ..................................................................................................................................................... 241

31.1 An Overview of Intents .............................................................................................................................................................. 241

31.2 Explicit Intents ........................................................................................................................................................................... 241

31.3 Returning Data from an Activity ................................................................................................................................................ 242

31.4 Implicit Intents ........................................................................................................................................................................... 243

31.5 Using Intent Filters..................................................................................................................................................................... 244

31.6 Checking Intent Availability ....................................................................................................................................................... 244

31.7 Summary .................................................................................................................................................................................... 245

32. Android Explicit Intents – A Worked Example ............................................................................................................................... 247

32.1 Creating the Explicit Intent Example Application ...................................................................................................................... 247

32.2 Designing the User Interface Layout for ActivityA ..................................................................................................................... 247

32.3 Creating the Second Activity Class ............................................................................................................................................. 249

32.4 Designing the User Interface Layout for ActivityB ..................................................................................................................... 250

32.5 Reviewing the Application Manifest File ................................................................................................................................... 251

32.6 Creating the Intent .................................................................................................................................................................... 252

32.7 Extracting Intent Data ................................................................................................................................................................ 253

32.8 Launching ActivityB as a Sub-Activity ........................................................................................................................................ 253

32.9 Returning Data from a Sub-Activity ........................................................................................................................................... 254

32.10 Testing the Application ............................................................................................................................................................ 255

32.11 Summary .................................................................................................................................................................................. 255

33. Android Implicit Intents – A Worked Example ............................................................................................................................... 257

33.1 Creating the Android Studio Implicit Intent Example Project.................................................................................................... 257

33.2 Designing the User Interface ..................................................................................................................................................... 257

33.3 Creating the Implicit Intent........................................................................................................................................................ 258

33.4 Adding a Second Matching Activity ........................................................................................................................................... 259

33.5 Adding the Web View to the UI ................................................................................................................................................. 259

33.6 Obtaining the Intent URL ........................................................................................................................................................... 260

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33.7 Modifying the MyWebView Project Manifest File..................................................................................................................... 261

33.8 Installing the MyWebView Package on a Device ....................................................................................................................... 263

33.9 Testing the Application .............................................................................................................................................................. 264

33.10 Summary .................................................................................................................................................................................. 264

34. Android Broadcast Intents and Broadcast Receivers ..................................................................................................................... 265

34.1 An Overview of Broadcast Intents ............................................................................................................................................. 265

34.2 An Overview of Broadcast Receivers ......................................................................................................................................... 266

34.3 Obtaining Results from a Broadcast .......................................................................................................................................... 267

34.4 Sticky Broadcast Intents ............................................................................................................................................................ 267

34.5 The Broadcast Intent Example ................................................................................................................................................... 267

34.6 Creating the Example Application ............................................................................................................................................. 268

34.7 Creating and Sending the Broadcast Intent ............................................................................................................................... 268

34.8 Creating the Broadcast Receiver ............................................................................................................................................... 269

34.9 Configuring a Broadcast Receiver in the Manifest File .............................................................................................................. 270

34.10 Testing the Broadcast Example................................................................................................................................................ 271

34.11 Listening for System Broadcasts .............................................................................................................................................. 271

34.12 Summary .................................................................................................................................................................................. 272

35. A Basic Overview of Android Threads and Thread Handlers ......................................................................................................... 273

35.1 An Overview of Threads ............................................................................................................................................................ 273

35.2 The Application Main Thread .................................................................................................................................................... 273

35.3 Thread Handlers ........................................................................................................................................................................ 273

35.4 A Basic Threading Example ........................................................................................................................................................ 273

35.5 Creating a New Thread .............................................................................................................................................................. 276

35.6 Implementing a Thread Handler ................................................................................................................................................ 277

35.7 Passing a Message to the Handler ............................................................................................................................................. 278

35.8 Summary .................................................................................................................................................................................... 280

36. An Overview of Android Started and Bound Services ................................................................................................................... 281

36.1 Started Services ......................................................................................................................................................................... 281

36.2 Intent Service ............................................................................................................................................................................. 281

36.3 Bound Service ............................................................................................................................................................................ 282

36.4 The Anatomy of a Service .......................................................................................................................................................... 282

36.5 Controlling Destroyed Service Restart Options ......................................................................................................................... 283

36.6 Declaring a Service in the Manifest File ..................................................................................................................................... 283

36.7 Starting a Service Running on System Startup........................................................................................................................... 284

36.8 Summary .................................................................................................................................................................................... 284

37. Implementing an Android Started Service – A Worked Example .................................................................................................. 285

37.1 Creating the Example Project .................................................................................................................................................... 285

37.2 Creating the Service Class .......................................................................................................................................................... 285

37.3 Adding the Service to the Manifest File..................................................................................................................................... 286

37.4 Starting the Service .................................................................................................................................................................... 287

37.5 Testing the IntentService Example ............................................................................................................................................ 288

37.6 Using the Service Class .............................................................................................................................................................. 288

37.7 Creating the New Service .......................................................................................................................................................... 288

37.8 Modifying the User Interface..................................................................................................................................................... 290

37.9 Running the Application ............................................................................................................................................................ 291

37.10 Creating a New Thread for Service Tasks ................................................................................................................................ 291

37.11 Summary .................................................................................................................................................................................. 293

38. Android Local Bound Services – A Worked Example...................................................................................................................... 295

38.1 Understanding Bound Services .................................................................................................................................................. 295

38.2 Bound Service Interaction Options ............................................................................................................................................ 295

38.3 An Android Studio Local Bound Service Example ...................................................................................................................... 295

38.4 Adding a Bound Service to the Project ...................................................................................................................................... 296

38.5 Implementing the Binder ........................................................................................................................................................... 296

38.6 Binding the Client to the Service ............................................................................................................................................... 298

38.7 Completing the Example............................................................................................................................................................ 300

38.8 Testing the Application .............................................................................................................................................................. 302

38.9 Summary .................................................................................................................................................................................... 302

39. Android Remote Bound Services – A Worked Example ................................................................................................................. 303

39.1 Client to Remote Service Communication ................................................................................................................................. 303

39.2 Creating the Example Application ............................................................................................................................................. 303

39.3 Designing the User Interface ..................................................................................................................................................... 303

39.4 Implementing the Remote Bound Service ................................................................................................................................. 304

39.5 Configuring a Remote Service in the Manifest File.................................................................................................................... 305

39.6 Launching and Binding to the Remote Service .......................................................................................................................... 306

39.7 Sending a Message to the Remote Service ................................................................................................................................ 307

39.8 Summary .................................................................................................................................................................................... 308

40. An Overview of Android SQLite Databases .................................................................................................................................... 309

40.1 Understanding Database Tables ................................................................................................................................................ 309

40.2 Introducing Database Schema ................................................................................................................................................... 309

40.3 Columns and Data Types ........................................................................................................................................................... 309

40.4 Database Rows .......................................................................................................................................................................... 310

40.5 Introducing Primary Keys ........................................................................................................................................................... 310

40.6 What is SQLite? .......................................................................................................................................................................... 310

40.7 Structured Query Language (SQL) ............................................................................................................................................. 310

40.8 Trying SQLite on an Android Virtual Device (AVD) .................................................................................................................... 311

40.9 Android SQLite Java Classes....................................................................................................................................................... 313

40.9.1 Cursor ................................................................................................................................................................................. 313

40.9.2 SQLiteDatabase .................................................................................................................................................................. 313

40.9.3 SQLiteOpenHelper .............................................................................................................................................................. 313

40.9.4 ContentValues .................................................................................................................................................................... 314

40.10 Summary .................................................................................................................................................................................. 314

41. An Android TableLayout and TableRow Tutorial ........................................................................................................................... 315

41.1 The TableLayout and TableRow Layout Views........................................................................................................................... 315

41.2 Creating the Database Project ................................................................................................................................................... 317

41.3 Adding the TableLayout to the User Interface .......................................................................................................................... 317

41.4 Adding and Configuring the TableRows..................................................................................................................................... 317

41.5 Adding the Button Bar to the Layout ......................................................................................................................................... 318

41.6 Adjusting the Layout Margins .................................................................................................................................................... 319

41.7 Summary .................................................................................................................................................................................... 322

42. An Android SQLite Database Tutorial ............................................................................................................................................. 323

42.1 About the Database Example .................................................................................................................................................... 323

42.2 Creating the Data Model ........................................................................................................................................................... 323

42.3 Implementing the Data Handler ................................................................................................................................................ 325

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