Android Fragmentation Management How-to by Gianluca Pacchiella

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By Gianluca Pacchiella

Examine anything new straight away! a quick, speedy, concentrated consultant supplying rapid effects. write apps that paintings on any Android model able to use code to unravel any compatibility factor Get hands-on with the most important factor that faces Android builders.

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Xml, which expresses the application's compatibility with one or more versions of the Android platform. As the meaning of minSdkVersion is rather obvious, let me quote an excerpt from the documentation of targetSdkVersion: This attribute informs the system that you have tested against the target version and the system should not enable any compatibility behaviors to maintain your app's forward-compatibility with the target version. The application is still able to run on older versions (down to minSdkVersion).

Let's write some example code in order to show how this is supposed to work: 1. AlertDialog; 2. Create a class extending FragmentDialog: static public class DialogCompatibility extends DialogFragment { … } 3. create(); } 4. Add an option in the menu's resource file: 5. onOptionsItemSelected(item); } } Obviously this is a very simple example and much more could be said, but it's left as an exercise for the reader (as, for example, how to embed a dialog into an Activity).

Post() with a Runnable class's definition as the argument. The fundamental point to remember in order to use these classes is to call Looper. loop() in the run() method of the thread and the code related to the Handler class in between—that's all. The only thread that has yet a Looper defined is the UI Thread that makes some methods available in order to post the Runnable class instance in it. post(Runnable) method. info Instant Android Fragmentation Management How-to Looper and Handler are important since they are at the core of the system, and more importantly, they have been available since API level 1, making them good resources for writing the Android applications.

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