Android - CommonsWare

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Welcome to the Book! Thanks! Preface Thanks for your interest in developing applications for Android! Increasingly, people will access Internet-based services using so-called "non-traditional" means, such as mobile devices. The more we do in that space now, the more that people will help invest in that space to make it easier to build more powerful mobile applications in the future. Android is new – Android-powered devices appeared on the scene first in late 2008 – but it likely will rapidly grow in importance due to the size and scope of the Open Handset Alliance. And, most of all, thanks for your interest in this book! I sincerely hope you find it useful and at least occasionally entertaining. Prerequisites If you are interested in programming for Android, you will need at least basic understanding of how to program in Java. Android programming is done using Java syntax, plus a class library that resembles a subset of the Java SE library (plus Android-specific extensions). If you have not programmed in Java before, you probably should learn how that works before attempting to dive into programming for Android. xix Subscribe to updates at http://commonsware.com Special Creative Commons BY-SA 3.0 License Edition
The book does not cover in any detail how to download or install the Android development tools, either the Eclipse IDE flavor or the standalone flavor. The Android Web site covers this quite nicely. The material in the book should be relevant whether you use the IDE or not. You should download, install, and test out the Android development tools from the Android Web site before trying any of the examples listed in this book. Some chapters may reference material in previous chapters, though usually with a link back to the preceding section of relevance. Also, not every sample shown has the complete source code in the book, lest this book get too large. If you wish to compile the samples, download the source code from the CommonsWare Web site. Warescription This book will be published both in print and in digital (ebook) form. The ebook versions of all CommonsWare titles are available via an annual subscription – the Warescription. The Warescription entitles you, for the duration of your subscription, to ebook forms of all CommonsWare titles, not just the one you are reading. Presently, CommonsWare offers PDF and Kindle; other ebook formats will be added based on interest and the openness of the format. Each subscriber gets personalized editions of all editions of each title: both those mirroring printed editions and in-between updates that are only available in ebook form. That way, your ebooks are never out of date for long, and you can take advantage of new material as it is made available instead of having to wait for a whole new print edition. For example, when new releases of the Android SDK are made available, this book will be quickly updated to be accurate with changes in the APIs. From time to time, subscribers will also receive access to subscriber-only online material, both short articles and not-yet-published new titles. Also, if you own a print copy of a CommonsWare book, and it is in good clean condition with no marks or stickers, you can exchange that copy for a discount off the Warescription price. xx Subscribe to updates at http://commonsware.com Special Creative Commons BY-SA 3.0 License Edition
Page 1 and 2: The Busy Coder's Guide to Android D
Page 3 and 4: The Busy Coder's Guide to Android D
Page 5 and 6: GPS................................
Page 7 and 8: Using Selection Widgets............
Page 9 and 10: Embedding the WebKit Browser.......
Page 11 and 12: Styled Text........................
Page 13 and 14: query()............................
Page 15 and 16: You Make the Call!.................
Page 17 and 18: Handling API Changes...............
Page 19: your operating system does not supp
Page 23 and 24: • Places where you think we could
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Page 29 and 30: The Big Picture • Keyboards, if t
Page 31 and 32: Content Providers The Big Picture C
Page 35 and 36: Projects and Targets To test your a
Page 37 and 38: Projects and Targets • libs/, whi
Page 39 and 40: Projects and Targets You also indic
Page 41 and 42: Projects and Targets In the preced
Page 43 and 44: Projects and Targets ... At the
Page 45 and 46: Projects and Targets You can create
Page 47 and 48: Projects and Targets • Only ask f
Page 51 and 52: Creating a Skeleton Application For
Page 53 and 54: Creating a Skeleton Application The
Page 55 and 56: Creating a Skeleton Application Fig
Page 59 and 60: Using XML-Based Layouts Android's S
Page 61 and 62: Using XML-Based Layouts Since this
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Page 67 and 68: Employing Basic Widgets • android
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Employing Basic Widgets For this pr
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Employing Basic Widgets The corresp
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Turn the Radio Up Employing Basic W
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It's Quite a View Employing Basic W
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Subscribe to updates at http://comm
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Thinking Linearly Working with Cont
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Working with Containers • Set all
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Example Working with Containers Let
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} } } Working with Containers case
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Working with Containers If we toggl
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Working with Containers Positions R
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Working with Containers android:lay
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Working with Containers first in th
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Putting Cells in Rows Working with
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Working with Containers You can als
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Working with Containers
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Working with Containers the remaini
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Using Selection Widgets listbox. Th
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Using Selection Widgets android:lay
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Using Selection Widgets Then, rathe
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Using Selection Widgets the setDrop
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Using Selection Widgets Figure 24.
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Using Selection Widgets For example
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Using Selection Widgets TextView, w
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Using Selection Widgets something n
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Using Selection Widgets Figure 28.
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Using Selection Widgets • android
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Getting Fancy With Lists For exampl
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Getting Fancy With Lists A Dynamic
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Getting Fancy With Lists In the sam
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And you want happy users, right? Ge
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Using the Holder Pattern Getting Fa
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Getting Fancy With Lists super.onCr
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} Getting Fancy With Lists public v
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Getting Fancy With Lists So, let's
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Getting Fancy With Lists 1. While w
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Getting Fancy With Lists Figure 33.
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Getting Fancy With Lists So if we w
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Getting Fancy With Lists layout.set
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Getting Fancy With Lists public Rat
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Getting Fancy With Lists Details of
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Employing Fancy Widgets and Contain
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The Input Method Framework Of cours
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The Input Method Framework H
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The Input Method Framework Numbers
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The Input Method Framework android:
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The Input Method Framework Figure 5
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Applying Menus will appear, showing
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Applying Menus appropriate behavior
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Applying Menus @Override public voi
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Applying Menus Figure 56. The MenuD
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Applying Menus Figure 59. The same
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Applying Menus • You must
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Applying Menus In the layout XML sh
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Fonts 178 Subscribe
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The results? Fonts Figure 61. The F
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Fonts And, of course, Android's int
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android:layout_width="fill_parent"
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Embedding the WebKit Browser on the
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Embedding the WebKit Browser • go
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Running this activity gives us: Emb
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Showing Pop-Up Messages from the cu
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Showing Pop-Up Messages android:lay
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Showing Pop-Up Messages Figure 66.
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Dealing with Threads - merely creat
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Dealing with Threads super.onCreate
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Runnables Dealing with Threads If y
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Dealing with Threads AsyncTask, Gen
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import android.widget.ArrayAdapter;
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Dealing with Threads Since we elect
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Dealing with Threads Figure 68. The
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Handling Activity Lifecycle Events
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onPause() and onResume() Handling A
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What's Your Intent? Creating Intent
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Creating Intent Filters Basically,
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Narrow Receivers Creating Intent Fi
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Launching Activities and Sub-Activi
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} }); } } Launching Activities and
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Handling Rotation control over the
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Uri contact=null; Handling Rotation
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Handling Rotation Figure 74. The Ro
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Handling Rotation viewButton.setOnC
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Handling Rotation android:versionNa
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Handling Rotation To block Android
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Handling Rotation Note that Android
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Working with Resources • Strings,
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Working with Resources ((TextView)f
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@Override public void onCreate(Bund
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Got the Picture? Working with Resou
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Working with Resources Figure 79. T
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Working with Resources public void
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10px 1in Working with Resources In
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Working with Resources Different St
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Working with Resources • There ca
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Working with Resources 2. Next, And
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Using Preferences 3. getDefaultShar
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Using Preferences allowing users to
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Using Preferences Figure 81. The Si
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Using Preferences The fields for
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Using Preferences Any children of P
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Using Preferences Figure 85. The ch
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Philadelphia Pittsburgh Allentown/B
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Using Preferences Figure 88. Editin
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Managing and Accessing Local Databa
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Accessing Files application package
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} } Accessing Files .makeText(this,
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android:text="Close" /> Accessing
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Accessing Files openFileInput() to
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Leveraging Java Libraries • Size:
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android:layout_height="wrap_content
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Leveraging Java Libraries Figure 96
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Reviewing the Script Leveraging Jav
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Communicating via the Internet styl
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Communicating via the Internet We h
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Communicating via the Internet for
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Pieces of Me Using a Content Provid
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Using a Content Provider This metho
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Using a Content Provider • The pr
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Using a Content Provider To delete
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First, Some Dissection Building a C
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onCreate() Building a Content Provi
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Building a Content Provider } else
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Building a Content Provider WHERE c
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getType() Building a Content Provid
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Building a Content Provider
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Mother, May I? Requesting and Requi
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Requesting and Requiring Permission
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Requesting and Requiring Permission
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Service with Class Creating a Servi
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Creating a Service immune to garbag
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Creating a Service For example, the
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Creating a Service @Override protec
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The Ties That Bind Invoking a Servi
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Invoking a Service private void upd
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Alerting Users Via Notifications In
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import android.app.Activity; import
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Alerting Users Via Notifications 4.
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Accessing Location-Based Services L
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Accessing Location-Based Services
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Accessing Location-Based Services
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Mapping with MapView and MapActivit
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Rugged Terrain Mapping with MapView
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Handling Telephone Calls Report To
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Handling Telephone Calls The activi
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Development Tools Figure 105. ReadW
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Development Tools Figure 107. Hiera
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Development Tools Figure 109. Hiera
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Development Tools What may not be i
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Logging Development Tools Figure 11
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Development Tools Figure 114. DDMS
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Development Tools Figure 116. DDMS
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Development Tools Figure 118. Simul
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Put It On My Card Development Tools
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Taking the Default Handling Multipl
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Handling Multiple Screen Sizes •
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Handling Multiple Screen Sizes Thes
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Density-Based Sets Handling Multipl
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Handling Multiple Screen Sizes •
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Handling Multiple Screen Sizes size
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Handling Multiple Screen Sizes Repl
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Handling Multiple Screen Sizes scal
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Handling Multiple Screen Sizes R.st
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Handling Multiple Screen Sizes Figu
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Handling Multiple Screen Sizes />
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Handling Multiple Screen Sizes Now
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super.onCreate(savedInstanceState);
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Handling Multiple Screen Sizes In s
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Dealing With Devices Fortunately, s
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Dealing With Devices Market are tes
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Dealing With Devices The CLIQ also
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Not all devices will be this way. H
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The lessons to take from this: Hand
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Handling Platform Changes Note that
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Wrapping the API Handling Platform
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Handling Platform Changes } else {
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} } Handling Platform Changes publi
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You might also consider: Where Do W
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ContentManager.....................
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PreferenceCategory.................
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INTEGER............................
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getSpeed().........................
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setColumnShrinkable()..............
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android:paddingBottom..............
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