Android How to Program

Cover......Page 1
Title......Page 5
Copyright......Page 6
Contents......Page 9
Preface......Page 21
Before You Begin......Page 33
1 Introduction to Android......Page 41
 1.1 Introduction......Page 42
 1.3 Android Features......Page 43
  1.4.1 Android 2.2 (Froyo)......Page 47
  1.4.4 Android 4.0 through 4.0.4 (Ice Cream Sandwich)......Page 48
  1.4.5 Android 4.1–4.3 (Jelly Bean)......Page 49
  1.4.6 Android 4.4 (KitKat)......Page 50
 1.5 Downloading Apps from Google Play......Page 51
 1.6 Packages......Page 52
 1.7 Android Software Development Kit (SDK)......Page 53
 1.8 Object-Oriented Programming: A Quick Refresher......Page 56
  1.8.5 Messages and Method Calls......Page 57
  1.8.9 Object-Oriented Analysis and Design (OOAD)......Page 58
  1.9.1 Running the Doodlz App in the Nexus 4 Smartphone AVD......Page 59
  1.9.2 Running the Doodlz App in a Tablet AVD......Page 68
 1.10 Building Great Android Apps......Page 70
 1.11 Android Development Resources......Page 72
 1.12 Wrap-Up......Page 75
2 Welcome App......Page 78
 2.1 Introduction......Page 79
  2.2.5 Internationalization......Page 80
  2.3.2 Creating a New Project......Page 81
  2.3.3 New Android Application Dialog......Page 82
  2.3.5 Configure Launcher Icon Step......Page 83
  2.3.6 Create Activity Step......Page 85
  2.3.7 Blank Activity Step......Page 86
 2.4 Android Developer Tools Window......Page 87
  2.4.4 App Resource Files......Page 88
  2.4.6 The Default GUI......Page 89
  2.5.1 Adding Images to the Project......Page 91
  2.5.2 Changing the Id Property of the RelativeLayout and the TextView......Page 92
  2.5.3 Configuring the TextView......Page 93
  2.5.4 Adding ImageViews to Display the Images......Page 97
 2.6 Running the Welcome App......Page 99
 2.7 Making Your App Accessible......Page 100
 2.8 Internationalizing Your App......Page 102
 2.9 Wrap-Up......Page 106
3 Tip Calculator App......Page 109
 3.1 Introduction......Page 110
 3.2 Test-Driving the Tip Calculator App......Page 111
  3.3.2 Activity Lifecycle Methods......Page 112
  3.3.4 Creating and Customizing the GUI with the Graphical Layout Editor and the Outline and Properties Windows......Page 113
  3.3.7 Implementing Interface OnSeekBarChangeListener for Handling SeekBar Thumb Position Changes......Page 114
  3.4.1 GridLayout Introduction......Page 115
  3.4.3 Changing to a GridLayout......Page 117
  3.4.4 Adding the TextViews, EditText, SeekBar and LinearLayouts......Page 118
  3.4.5 Customizing the Views to Complete the Design......Page 120
 3.5 Adding Functionality to the App......Page 124
 3.6 AndroidManifest.xml......Page 132
 3.7 Wrap-Up......Page 133
4 Twitter® Searches App......Page 137
 4.1 Introduction......Page 138
  4.2.1 Importing the App and Running It......Page 139
  4.2.2 Adding a Favorite Search......Page 140
  4.2.3 Viewing Twitter Search Results......Page 141
  4.2.4 Editing a Search......Page 142
  4.2.6 Deleting a Search......Page 144
  4.3.1 ListView......Page 145
  4.3.5 SharedPreferences......Page 146
  4.3.7 AlertDialog......Page 147
  4.4.1 Creating the Project......Page 148
  4.4.2 activity_main.xml Overview......Page 149
  4.4.3 Adding the GridLayout and Components......Page 150
  4.4.4 Graphical Layout Editor Toolbar......Page 155
  4.4.5 ListView Item’s Layout: list_item.xml......Page 156
  4.5.1 package and import Statements......Page 157
  4.5.3 Fields of Class MainActivity......Page 159
  4.5.4 Overriding Activity Method onCreate......Page 160
  4.5.5 Anonymous Inner Class That Implements the saveButton’s OnClickListener to Save a New or Updated Search......Page 162
  4.5.6 addTaggedSearch Method......Page 164
  4.5.7 Anonymous Inner Class That Implements the ListView’s OnItemClickListener to Display Search Results......Page 165
  4.5.8 Anonymous Inner Class That Implements the ListView’s OnItemLongClickListener to Share, Edit or Delete a Search......Page 167
  4.5.9 shareSearch Method......Page 169
  4.5.10 deleteSearch Method......Page 170
 4.7 Wrap-Up......Page 172
5 Flag Quiz App......Page 176
 5.1 Introduction......Page 177
  5.2.2 Configuring the Quiz......Page 179
  5.2.3 Taking the Quiz......Page 181
  5.3.2 Fragments......Page 183
  5.3.6 assets Folder......Page 184
  5.3.8 Supporting Different Screen Sizes and Resolutions......Page 185
  5.3.12 Applying an Animation to a View......Page 186
  5.4.1 Creating the Project......Page 187
  5.4.2 strings.xml and Formatted String Resources......Page 188
  5.4.3 arrays.xml......Page 189
  5.4.5 dimens.xml......Page 190
  5.4.8 fragment_quiz.xml Layout......Page 191
  5.4.9 activity_main.xml Layout for Tablet Landscape Orientation......Page 194
  5.4.10 preferences.xml for Specifying the App’s Settings......Page 195
  5.4.11 Creating the Flag Shake Animation......Page 196
  5.5.1 package Statement, import Statements and Fields......Page 198
  5.5.2 Overridden Activity Method onCreate......Page 199
  5.5.4 Overridden Activity Method onCreateOptionsMenu......Page 201
  5.5.5 Overridden Activity Method onOptionsItemSelected......Page 202
  5.5.6 Anonymous Inner Class That Implements OnSharedPreferenceChangeListener......Page 203
  5.6.1 package Statement and import Statements......Page 204
  5.6.2 Fields......Page 205
  5.6.3 Overridden Fragment Method onCreateView......Page 206
  5.6.4 Method updateGuessRows......Page 208
  5.6.6 Method resetQuiz......Page 209
  5.6.7 Method loadNextFlag......Page 211
  5.6.9 Anonymous Inner Class That Implements OnClickListener......Page 213
 5.7 SettingsFragment Class......Page 216
 5.9 AndroidManifest.xml......Page 217
 5.10 Wrap-Up......Page 218
6 Cannon Game App......Page 222
 6.1 Introduction......Page 223
  6.3.3 Activity and Fragment Lifecycle Methods......Page 225
  6.3.6 Frame-by-Frame Animation with Threads, SurfaceView and SurfaceHolder......Page 226
  6.4.1 Creating the Project......Page 227
  6.4.3 fragment_game.xml......Page 228
 6.5 Class Line Maintains a Line’s Endpoints......Page 229
 6.7 CannonGameFragment Subclass of Fragment......Page 230
  6.8.1 package and import Statements......Page 232
  6.8.2 Instance Variables and Constants......Page 233
  6.8.3 Constructor......Page 234
  6.8.4 Overriding View Method onSizeChanged......Page 236
  6.8.5 Method newGame......Page 237
  6.8.6 Method updatePositions......Page 238
  6.8.7 Method fireCannonball......Page 241
  6.8.8 Method alignCannon......Page 242
  6.8.9 Method drawGameElements......Page 243
  6.8.10 Method showGameOverDialog......Page 245
  6.8.11 Methods stopGame and releaseResources......Page 246
  6.8.12 Implementing the SurfaceHolder.Callback Methods......Page 247
  6.8.13 Overriding View Method onTouchEvent......Page 248
  6.8.14 CannonThread: Using a Thread to Create a Game Loop......Page 249
 6.9 Wrap-Up......Page 250
7 Doodlz App......Page 255
 7.1 Introduction......Page 256
  7.2.2 Custom DialogFragments......Page 258
  7.2.7 Saving the Drawing to the Device’s Gallery......Page 259
  7.3.2 strings.xml......Page 260
  7.3.3 dimens.xml......Page 261
  7.3.4 Menu for the DoodleFragment......Page 262
  7.3.6 fragment_doodle.xml Layout for DoodleFragment......Page 263
  7.3.7 fragment_color.xml Layout for ColorDialogFragment......Page 264
  7.3.8 fragment_line_width.xml Layout for LineWidthDialogFragment......Page 266
  7.3.9 Adding Class EraseImageDialogFragment......Page 267
 7.4 MainActivity Class......Page 268
 7.5 DoodleFragment Class......Page 269
 7.6 DoodleView Class......Page 276
 7.7 ColorDialogFragment Class......Page 288
 7.8 LineWidthDialogFragment Class......Page 291
 7.9 EraseImageDialogFragment Class......Page 295
 7.10 Wrap-Up......Page 296
8 Address Book App......Page 300
 8.1 Introduction......Page 301
 8.3 Technologies Overview......Page 304
  8.3.5 Specifying a Background for a TextView......Page 305
  8.4.1 Creating the Project......Page 306
  8.4.3 strings.xml......Page 307
  8.4.4 styles.xml......Page 308
  8.4.5 textview_border.xml......Page 309
  8.4.7 DetailsFragment’s Layout: fragment_details.xml......Page 310
  8.4.8 AddEditFragment’s Layout: fragment_add_edit.xml......Page 312
  8.4.9 Defining the Fragments’ Menus......Page 313
 8.5 MainActivity Class......Page 314
 8.6 ContactListFragment Class......Page 320
 8.7 AddEditFragment Class......Page 327
 8.8 DetailsFragment Class......Page 333
 8.9 DatabaseConnector Utility Class......Page 341
 8.10 Wrap-Up......Page 346
9 Google Play and App Business Issues......Page 350
 9.2 Preparing Your Apps for Publication......Page 351
  9.2.3 Icons and Labels......Page 352
  9.2.6 Obfuscating Your Code......Page 353
  9.2.8 Screenshots......Page 354
  9.2.9 Promotional App Video......Page 355
 9.3 Pricing Your App: Free or Fee......Page 356
  9.3.2 Free Apps......Page 357
 9.4 Monetizing Apps with In-App Advertising......Page 358
 9.5 Monetizing Apps: Using In-App Billing to Sell Virtual Goods......Page 359
 9.6 Registering at Google Play......Page 360
 9.7 Setting Up a Google Wallet Merchant Account......Page 361
 9.8 Uploading Your Apps to Google Play......Page 362
 9.9 Launching the Play Store from Within Your App......Page 363
 9.12 Other Popular Mobile App Platforms......Page 364
 9.13 Marketing Your Apps......Page 365
 9.14 Wrap-Up......Page 369
A Introduction to Java Applications......Page 372
 A.2 Your First Program in Java: Printing a Line of Text......Page 373
 A.3 Modifying Your First Java Program......Page 377
 A.5 Another Application: Adding Integers......Page 379
 A.6 Memory Concepts......Page 383
 A.7 Arithmetic......Page 384
 A.8 Decision Making: Equality and Relational Operators......Page 387
 A.9 Wrap-Up......Page 391
B Introduction to Classes, Objects, Methods and Strings......Page 396
 B.2 Declaring a Class with a Method and Instantiating an Object of a Class......Page 397
 B.3 Declaring a Method with a Parameter......Page 400
 B.4 Instance Variables, set Methods and get Methods......Page 403
 B.5 Primitive Types vs. Reference Types......Page 407
 B.6 Initializing Objects with Constructors......Page 408
 B.7 Floating-Point Numbers and Type double......Page 410
 B.8 Wrap-Up......Page 414
C Control Statements......Page 418
 C.2 Algorithms......Page 419
 C.4 Control Structures......Page 420
 C.6 if…else Double-Selection Statement......Page 421
 C.8 Case Study: Counter-Controlled Repetition......Page 424
 C.9 Case Study: Sentinel-Controlled Repetition......Page 428
 C.10 Case Study: Nested Control Statements......Page 433
 C.12 Increment and Decrement Operators......Page 436
 C.13 Primitive Types......Page 438
 C.14 Essentials of Counter-Controlled Repetition......Page 439
 C.15 for Repetition Statement......Page 440
 C.16 Examples Using the for Statement......Page 442
 C.17 do…while Repetition Statement......Page 444
 C.18 switch Multiple-Selection Statement......Page 445
 C.20 Logical Operators......Page 452
 C.21 Wrap-Up......Page 455
D Methods: A Deeper Look......Page 463
 D.2 Program Modules in Java......Page 464
 D.3 static Methods, static Fields and Class Math......Page 465
 D.4 Declaring Methods with Multiple Parameters......Page 467
 D.5 Notes on Declaring and Using Methods......Page 470
 D.7 Argument Promotion and Casting......Page 471
 D.8 Java API Packages......Page 472
 D.9 Introduction to Random-Number Generation......Page 473
  D.9.1 Scaling and Shifting of Random Numbers......Page 474
  D.9.2 Random-Number Repeatability for Testing and Debugging......Page 475
 D.10 Case Study: A Game of Chance; Introducing Enumerations......Page 476
 D.11 Scope of Declarations......Page 480
 D.12 Method Overloading......Page 482
 D.13 Wrap-Up......Page 485
E Arrays and ArrayLists......Page 492
 E.2 Arrays......Page 493
 E.3 Declaring and Creating Arrays......Page 494
 E.4 Examples Using Arrays......Page 495
 E.5 Case Study: Card Shuffling and Dealing Simulation......Page 504
 E.6 Enhanced for Statement......Page 508
 E.7 Passing Arrays to Methods......Page 509
 E.8 Case Study: Class GradeBook Using an Array to Store Grades......Page 513
 E.9 Multidimensional Arrays......Page 518
 E.10 Case Study: Class GradeBook Using a Two-Dimensional Array......Page 522
 E.11 Class Arrays......Page 528
 E.12 Introduction to Collections and Class ArrayList......Page 530
 E.13 Wrap-Up......Page 533
F Classes and Objects: A Deeper Look......Page 538
 F.2 Time Class Case Study......Page 539
 F.3 Controlling Access to Members......Page 543
 F.4 Referring to the Current Object’s Members with the this Reference......Page 544
 F.5 Time Class Case Study: Overloaded Constructors......Page 546
 F.6 Default and No-Argument Constructors......Page 552
 F.7 Composition......Page 553
 F.8 Enumerations......Page 556
 F.9 Garbage Collection......Page 558
 F.10 static Class Members......Page 559
 F.12 Packages......Page 563
 F.14 Wrap-Up......Page 564
G Object-Oriented Programming: Inheritance and Polymorphism......Page 567
 G.1 Introduction to Inheritance......Page 568
 G.2 Superclasses and Subclasses......Page 569
 G.3 protected Members......Page 570
  G.4.1 Creating and Using a CommissionEmployee Class......Page 571
  G.4.2 Creating and Using a BasePlusCommissionEmployee Class......Page 576
  G.4.3 Creating a CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy......Page 581
  G.4.4 CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy Using protected Instance Variables......Page 584
  G.4.5 CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy Using private Instance Variables......Page 587
 G.5 Class Object......Page 592
 G.6 Introduction to Polymorphism......Page 593
 G.7 Polymorphism: An Example......Page 594
 G.8 Demonstrating Polymorphic Behavior......Page 595
 G.9 Abstract Classes and Methods......Page 598
 G.10 Case Study: Payroll System Using Polymorphism......Page 599
  G.10.1 Abstract Superclass Employee......Page 600
  G.10.2 Concrete Subclass SalariedEmployee......Page 603
  G.10.3 Concrete Subclass HourlyEmployee......Page 605
  G.10.4 Concrete Subclass CommissionEmployee......Page 606
  G.10.5 Indirect Concrete Subclass BasePlusCommissionEmployee......Page 608
  G.10.6 Polymorphic Processing, Operator instanceof and Downcasting......Page 609
  G.10.7 Summary of the Allowed Assignments Between Superclass and Subclass Variables......Page 614
 G.11 final Methods and Classes......Page 615
 G.12 Case Study: Creating and Using Interfaces......Page 616
  G.12.1 Developing a Payable Hierarchy......Page 617
  G.12.2 Interface Payable......Page 618
  G.12.3 Class Invoice......Page 619
  G.12.4 Modifying Class Employee to Implement Interface Payable......Page 621
  G.12.5 Modifying Class SalariedEmployee for Use in the Payable Hierarchy......Page 623
  G.12.6 Using Interface Payable to Process Invoices and Employees Polymorphically......Page 625
 G.13 Common Interfaces of the Java API......Page 626
 G.14 Wrap-Up......Page 627
H Exception Handling: A Deeper Look......Page 631
 H.2 Example: Divide by Zero without Exception Handling......Page 632
 H.3 Example: Handling ArithmeticExceptions and InputMismatchExceptions......Page 634
 H.5 Java Exception Hierarchy......Page 639
 H.6 finally Block......Page 642
 H.7 Stack Unwinding and Obtaining Information from an Exception Object......Page 646
 H.8 Wrap-Up......Page 649
I GUI Components and Event Handling......Page 652
 I.2 Nimbus Look-and-Feel......Page 653
 I.3 Text Fields and an Introduction to Event Handling with Nested Classes......Page 654
 I.4 Common GUI Event Types and Listener Interfaces......Page 660
 I.5 How Event Handling Works......Page 661
 I.6 JButton......Page 663
 I.7 JComboBox; Using an Anonymous Inner Class for Event Handling......Page 667
 I.8 Adapter Classes......Page 670
 I.9 Wrap-Up......Page 671
J Other Java Topics......Page 672
 J.2 Collections Overview......Page 673
 J.4 Interface Collection and Class Collections......Page 674
  J.5.1 ArrayList and Iterator......Page 675
  J.5.2 LinkedList......Page 677
  J.5.3 Views into Collections and Arrays Method asList......Page 680
  J.6.1 Method sort......Page 682
  J.6.2 Method shuffle......Page 684
 J.8 Sets......Page 685
 J.9 Maps......Page 686
 J.10 Introduction to Files and Streams......Page 689
 J.11 Class File......Page 690
 J.12 Introduction to Object Serialization......Page 691
 J.13 Introduction to Multithreading......Page 692
 J.14 Creating and Executing Threads with the Executor Framework......Page 693
 J.15 Overview of Thread Synchronization......Page 697
 J.17 Multithreading with GUI......Page 698
 J.18 Wrap-Up......Page 705
K Operator Precedence Chart......Page 708
L Primitive Types......Page 710
 A......Page 711
 B......Page 713
 C......Page 714
 D......Page 716
 E......Page 717
 G......Page 718
 H......Page 719
 I......Page 720
 L......Page 721
 M......Page 722
 O......Page 723
 P......Page 724
 R......Page 725
 S......Page 726
 T......Page 728
 W......Page 729
 Z......Page 730