摘要：
While developing your application, you should check that user interactions are buttery smooth, running at a consistent 60 frames per second. If someth 阅读全文
摘要：
A content provider manages access to a central repository of data. A provider is part of an Android application, which often provides its own UI for w 阅读全文
摘要：
Content providers manage access to a structured set of data. They encapsulate the data, and provide mechanisms for defining data security. Content pro 阅读全文