Android: Support Libraries for Android.

最新推荐文章于 2023-04-24 16:34:20 发布

最新推荐文章于 2023-04-24 16:34:20 发布 · 199 阅读

文章标签：

#移动开发

本文介绍了Android SDK组件中的支持库，它提供了一系列静态库，用于访问较旧平台上的新APIs及各种辅助类。通过简单地将这些库作为静态库导入项目，开发者可以在低版本SDK中支持FragmentAPI等特性。

http://developer.android.com/sdk/compatibility-library.html

SDK Manager中下载 Extras/Android Support package

下载玩后在android-sdk-windows\extras\android\support目录

使用时将android-support-v4.jar导入项目，可以在低版本SDK中支持Fragment API

介绍：

Support Libraries for Android.

This SDK component contains static libraries providing access to newer APIs
on older platforms and various helper classes.

To use those libraries, simply copy them as static libraries into your project.

Each library is called v<api>, indicating the minimum API level that they require.

*** V4 ***

v4/android-support-v4.jar contains:
- Fragment API. New in API 11 (3.0 - Honeycomb). http://developer.android.com/reference/android/app/Fragment.html
- Loader API. New in API 11 (3.0 - Honeycomb). http://developer.android.com/reference/android/app/LoaderManager.html
- CursorAdapter / ResourceCursorAdapter / SimpleCursorAdapter. These are the API 11 versions.
- MenuCompat allows calling MenuItem.setShowAsAction which only exists on API 11.

v4/src/ is the source code for the compatibility library
v4/samples/ provides a sample app using the library.

*** V13 ***

v13/android-support-v13.jar provides the same features as v4, plus:
- FragmentPagerAdapter: Implementation of PagerAdapter that represents each page as a Fragment.

v13/src/ is the source code for the compatibility library, not including the v4 source
v13/samples/ provides a sample app using the library.