«compl*tc IDIOT'S GUIDE. Android App. Development. by Christopher Froehlich ALPHA. A member of Penguin Group (USA) Inc.

Transcription

1 «compl*tc IDIOT'S GUIDE Android App Development by Christopher Froehlich A ALPHA A member of Penguin Group (USA) Inc.

2 Contents Part 1: Getting Started 1 1 An Open Invitation 3 Starting from Scratch 3 Software 4 Programming Experience 4 Selecting Your Development Environment 5 Varieties of Devices 6 Selecting a Platform V Device Restrictions 8 Forward Thinking and Backwards Compatibility 9 Assembling Your Toolkit 9 Java 10 Eclipse IDE for Java Developers 10 Android SDK U The ADTPluginfor Eclipse 12 Registeringfor the Android Market 14 2 Building for Android 15 Android Development Overview 15 Introduction to Eclipse 16 The Role of the Android SDK 18 Starting Your First Project 18 Creating the Project Files 19 Inside Your Project 21 Setting Your Preferences 22 Aloha, Android 24 Meet the Emulator 25 Debugging with the Emulator 27 Making the Device Connection 28 3 Crafting the Layout 31 Application Fundamentals 32 Reintroducing the Recipe App 34 Out the Welcome Screen 34 Laying Expanding Your View 40 Formattingfor All Displays 46 Your Icon 47 Introducing Your First Error 49

3 iv The Complete Idiot's Guide to Android App Development ^ 4 Finding More Activities ^ Improving Your Recipe App ^ Introduction to Refactoring About Vow App $6 Updating the Android Manifest $8 Adding an Activity. $9 Creating the Layout Putting It Together 62 Styling Your 65 App Selecting a Theme 65 Rolling Your Own Style 67 Polishing Your App 68 Adding a Menu 68 Storing Some Settings. 71 Quitting Time 75 5 Programming for Android 77 What Is Java? 77 Object Oriented Programming Review 78 The Java Virtual Machine 79 The Front of an Android Application Activities Views, Behind the Scenes 86 Intents 86 Intent Filters 88 Background Receivers 89 Part 2: Constructing Your Application 91 6 Resources and Animation 93 The Splash View 93 Assemble the View 94 Colors and Dimensions 96 Ready, Set, Animate 99 Method Acting 101 2D Graphics Overview 106 Working with Dratvables 107 Using Shapes. 107

4 Contents v 7 Building Input and Output HI Making a New Recipe EditText and Other Widgets HI 112 Deep Nested Views 115 Working with ListViews 120 Inflating the Layout 120 FromXML to Java 123 Simplify the Interface with TabHosts 127 Toast Feedback Storing and Retrieving Data 135 Storage Overview 135 SbaredPreferences 136 Internal Storage 138 External Data 140 Saving a New Recipe 140 Retrieving SbaredPreferences 141 Storing Input as SbaredPreferences 148 Manage Your Recipes Search for It 157 Search Basics 157 Create the Configuration 159 Define a Searchable Activity 161 Build the Search Activity 162 Providing the Search Option 165 Voice Search 166 More Search Options From Widgets to the Browser 169 Widgets and Dialogs 169 Constructing a Dialog 171 Dates and Times 173 More Widgets and Controls 176 Integrating the Browser 179 Opening the Web Page 180 Linkify 1%2 Embedding the Browser 183

5 vi The Complete Idiot's Guide to Android App Development Part 3: Make the Most of the Hardware Cameras and Media 191 Introduction to Multimedia on Android 191 Incorporating the Camera into Your App 193 Prepare the SurfaceView 193 Working Capturing the Camera Class 195 the Photo 197 Recording Video 198 Accessing Stored Photos 200 Embedding Audio or Video 201 Using the Microphone Location-Based Services 205 Introduction to Android Sensors and Receivers 205 Location, Location 207 Location Services 208 Consider Accuracy and the Battery 212 Emulator Limitations 213 Sense and Sensors 214 Reading a Sensor 215 Sensor Data 218 Integrate Maps 219 Registerfor Google Maps Access 219 Working with Google Maps D Graphics and Animation 225 Introduction to 3D Graphics 225 OpenGL Basics 226 Drawing an Activity 228 Model Objects 230 The Cube 230 Moving the Cube in 3D Core Services 239 Overview of Android Hardware 239 The Phone Itself 240 Working with Calls 241 Send SMS and MMS Messages 245

6 Contents vii Network Interfaces 247 Wi-Fi vs. 3G 248 Wi-Fi 250 Working with Bluetooth 251 Part 4: Increasing Your Application Scope A Touch of Locale 261 Localization 261 Managing Resources 262 Alternate Resources 264 Performing Translation in Code 267 Runtime Changes 270 Efficiently Rotating the Screen 272 Manually Manage Configuration Changes 273 Multi-Touch 274 MotionBvents 275 Build Your Own Gestures Threads and the Background 283 What Are Threads? 283 About Processes. 285 Working with Asy?jcTask 286 Dispatching Threads 290 Services 293 The Service Life Cycle 294 Building a Basic Service 294 Using Notifications SQL and Databases 301 SQL at a Glance 301 Intro to SQLite 304 Building the Helper Class 305 Database Interaction 307 More SQL Detail 310 Bring the Data into View 311 Additional SQLite Tools 315

7 viii The Complete Idiot's Guide to Android App Development 18 ContentProviders 319 Introduction to ContentProviders 319 Provider Syntax. Requesting Data from a ContentProvider 322 Building Your Own Provider 323 Prepare the Class.., ^24 Implement the Methods 326 Provider Permissions and the Manifest 330 Part 5: Taking Your App to Market Comprehensive Debugging 335 Logging 335 Debugging Your App 338 The Debug Perspective 339 Advanced Logging-with Tracevievi 340 Switching to the DDMS Perspective 341 Debugging with Dev Took Testing Your Apps 345 The Good News 345 Build a Testing Plan 346 Selecting Your Targets 341 Working ivith Multiple Versions ofandroid 348 Methods Change 350 Be Mindful of the Future 352 And More Tests App Markets and Beyond 355 Available Android Markets 355 Welcome to the Android Market 357 Registering Your Accounts 557 App Preparation 358 Certification 360 And Release! 362 Next Steps 364 Advertising 365 The Next Generation 366 Keep in Touch 366

8 Contents ix Appendixes A Glossary. 369 B Resources, References, and Useful Websites Index 379