下载android源码比较麻烦,不如在线查阅方便: http://developer.android.com/reference/packages.html http://developer.android.com/reference/android/content/BroadcastReceiver.html https://github.com/OESF/Embedded-Master-MIPS/blob/370863733b500b7f0ded111f4b800bce990d69a5/build/tools/signapk/SignApk.java 貌似被墙了: http://android.git.kernel.org/