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After you‘ve installed the Android SDK, start with this class to learn the basics about Android app development.
The action bar is one of the most important design elements you can implement for your app‘s activities. Although first introduced with API level 11, you can use the Support Library to include the action bar on devices running Android 2.1 or higher.
How to build your app with alternative resources that provide an optimized user experience on multiple device form factors using a single APK.
How Android activities live and die and how to create a seamless user experience by implementing lifecycle callback methods.
How to build a user interface for your app that is flexible enough to present multiple UI components on large screens and a more constrained set of UI components on smaller screens—essential for building a single APK for both phones and tablets.
How to save data on the device, whether it‘s temporary files, downloaded app assets, user media, structured data, or something else.
How to build a user experience that leverages other apps available on the device to perform advanced user tasks, such as capture a photo or view an address on a map.
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原文地址：http://www.cnblogs.com/me1105/p/4308417.html
