Android Support Pack Knowledge

The Android Support Library package is a set of code libraries that provide compatibility with backward versions of the framework APIs that are implemented as well as APIs that can be used only in the specified version. Each support library is a specified version of the compatibility library, and each support package version suffix VX represents the meaning. Android has a version number for each version, for example, 2.1 is 7,4.0 14,5.0 is 21. And here, the number after V represents the lowest version level that he is able to use, and the reason why it cannot be used in a lower version is because as the version is upgraded, there are many features or APIs that were not previously supported in the new version, so if you use these support packages in older versions, it can cause the app to crash.

Each support library contains code examples to help us learn how to use these APIs. The code is included in the files downloaded by the SDK Manager, which are included in the installation directory of the SDK and are listed below:

L 4v code example: <sdk>/extras/android/support/samples/support4demos/

L 7v code example: <sdk>/extras/android/support/samples/support7demos/

L 13V code example: <sdk>/extras/android/support/samples/support13demos/

L APP navigation:<sdk>/extras/android/support/samples/supportappnavigation/

For more information, please visit: http://www.cnblogs.com/l2rf/p/4980277.html

Android Support Pack Knowledge