本文是对Android SDK1.5版的英文开发资料Android Development Guide一文应用程序框架部分的翻译，覆盖了Android应用开发所有主要的概念。部分内容整理自网络。本文仅用于技术学习，请勿用于商业用途。-This article is the English version of Android SDK1.5 data Android Development Guide developed a paper application framework part of the translation, covering all major Android application development concepts. Part of the order from the network. This article is only for technical learning, do not for commercial purposes.