Android 入门 必读文档

Improving Layout Performance: http://developer.android.com/training/improving-layouts/index.html

Managing the Activity Lifecycle: http://developer.android.com/training/basics/activity-lifecycle/index.html

Building a Dynamic UI with Fragments: http://developer.android.com/training/basics/fragments/index.html

Designing for Multiple Screens: http://developer.android.com/training/multiscreen/index.html

Displaying Bitmaps Efficiently: http://developer.android.com/training/displaying-bitmaps/index.html

Performing Network Operations: http://developer.android.com/training/basics/network-ops/index.html

Support Library:http://developer.android.com/tools/extras/support-library.html

更基础些的文档：

Application Fundamentals： http://developer.android.com/guide/components/fundamentals.html

Activities： http://developer.android.com/guide/components/activities.html

Services： http://developer.android.com/guide/components/services.html

Processes and Threads: http://developer.android.com/guide/components/processes-and-threads.html

User Interface: http://developer.android.com/guide/topics/ui/index.html

Data Storage: http://developer.android.com/guide/topics/data/data-storage.html

Content Providers:http://developer.android.com/guide/topics/providers/content-providers.html

Intents and Intent Filters:http://developer.android.com/guide/components/intents-filters.html