By Ed Burnette
Android is a software program toolkit for cellphones, created by way of Google and the Open Handset Alliance. it really is within thousands of cellphones and different cellular units, making Android a tremendous platform for program builders. which may be your individual software operating on all these units. inside of mins, hi, Android gets you begun developing your first operating program: Android's model of "Hello, World." From there, you are going to increase a extra titanic instance: an Android Sudoku online game. through steadily including gains to the sport, you will examine the fundamentals of Android programming. you will additionally see easy methods to construct in audio and video aid, upload pictures utilizing second and 3D OpenGL, community with web content and internet providers, and shop facts with SQLite. you are going to additionally how one can submit your functions to the Android industry. the number 1 publication for studying Android is now in its 3rd variation. each web page and instance was once reviewed and up-to-date for compatibility with the newest models. Freshly additional fabric covers fitting functions to the SD card, aiding multi-touch, and developing reside wallpaper. you will additionally locate lots of real-world suggestion on easy methods to help all of the Android types in use today-everything from Cupcake (Android 1.5) to FroYo (Android 2.2) and past. If you'll otherwise be coding than interpreting approximately coding, this e-book is for you.
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Extra info for Hello, Android: Introducing Google's Mobile Development Platform (Pragmatic Programmers)
Activities that are not running in the foreground may be stopped, or the Linux process that houses them may be killed at any time in order to make room for new activities. This will be a common occurrence, so it’s important that your application be designed from the beginning with this in mind. In some cases, the onPause( ) method may be the last method called in your activity, so that’s where you should save any data you want to keep around for next time. In addition to managing your program’s life cycle, the Android framework provides a number of building blocks that you use to create your applications.
5: In landscape mode, we can’t see the Exit button. In this version, we introduce a new syntax, @+id/resid. Instead of referring to a resource ID defined somewhere else, this is how you create a new resource ID to which others can refer. For example, @+id/about_ button defines the ID for the About button, which we’ll use later to make something happen when the user presses that button. 4, on page 53. This new screen looks good in portrait mode (when the screen is taller than it is wide), but how about landscape mode (wide-screen)?
You should also consider using vector graphics instead of bitmaps (see Chapter 4, Exploring 2D Graphics, on page 73). From Library of Wow! 5: In landscape mode, we can’t see the Exit button. In this version, we introduce a new syntax, @+id/resid. Instead of referring to a resource ID defined somewhere else, this is how you create a new resource ID to which others can refer. For example, @+id/about_ button defines the ID for the About button, which we’ll use later to make something happen when the user presses that button.