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广播接收器分为标准广播和有序广播，标准广播是异步执行的广播，有序广播是同步执行的，同一时刻只有一个广播接收器会收到广播，执行结束后，广播才会继续传递。
在Androidmanifest.xml中添加<receiver>节点，并在代码中定义相应的类。在receiver字段里面可以指定priority来指定receiver的优先级，优先级高的会先接收到消息。如果不指定，后注册的receiver先接收到消息
<receiver android:name=".BootCompleteReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
public class BootCompleteReceiver extends BroadcastReceiver {
//static registered in AndroidManifest.xml
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Boot Complete", Toast.LENGTH_SHORT).show();
}
}
可以在代码中注册，这种方法比较灵活，可以自由的注册与注销，但是缺点是必须要程序启动才能收到广播。只需要创建一个BroadcastReceiver的子类并重写父类的onReceive函数就可以了。当有广播到来时，onReceive方法就会被执行。
public class MyReceiver extends BroadcastReceiver { public static final String ACTION = "com.wanxiang.www.learnbroadcastreceiver.intent.action.myReceiver";
case R.id.btnRegister: if (myReceiver == null){ myReceiver = new MyReceiver(); registerReceiver(myReceiver, new IntentFilter(MyReceiver.ACTION)); } break; case R.id.btnUnRegister: if (myReceiver != null){ unregisterReceiver(myReceiver); myReceiver =null; } break;
其他都同动态静态注册的broadcastreceiver一样，只是intent-filter写的是自己定义的broadcast,同样在类中也要写发送相应的broadcast(可能在一个button的click中)：
Intent intent = new Intent("com.wanxiang.www.broadcastreceiver.MY_BROADCAST"); //标准广播 sendBroadcast(intent); //有序广播，可以被abortBroadcast()截断 sendOrderedBroadcast(intent,null)；
发送的有序广播可以在BroadcastReceiver的onReceive函数中被截断：
sendOrderedBroadcast(i, null);
@Override public void onReceive(Context context, Intent intent) { // TODO: This method is called when the BroadcastReceiver is receiving // an Intent broadcast. System.out.println("MyReceiver1接受到了消息"); abortBroadcast(); }
只让broadcast在应用程序内部进行传递
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原文地址：http://www.cnblogs.com/dracohan/p/5837934.html
