There are a number of operations that you can register callback routines for and the value to indicate each operation begins with EM_ (the complete list is available in the API reference guide).

有许多可以为其注册回调例程的操作，这个参数值指出了每个以EM _开头的操作(完整列表可以从api参考指导中获得)。

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Every good, major web service API offers thorough documentation and some sort of quick start guide to try it out (here's Twitter's, for example).

每个优秀的主流的web服务API都附带有完整的文档和一些快速入手的指导(例如，这个就是 Twitter的)。

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The Dev Guide holds most of the documentation for the Android platform, except for reference material on the framework API.

开发指南涵盖了大部分的Android平台文档,除了一些对API框架的引用资料。

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