Broadcast Receiver注意事项

• 静态注册

<receiver
    android:name=".MyReceiver" android:enabled="true">
    <intent-filter>
        <action android:name="myAction" />
    </intent-filter>
</receiver>

• 动态注册

@Override
protected void onStart() {
    super.onStart();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction("myAction");
    registerReceiver(myReceiver, intentFilter);
}
@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(myReceiver);
}

• 发送广播

Intent intent = new Intent();
intent.setAction("myAction");
sendBroadcast(intent);

• 注意事项:
  

如果没有添加IntentFilter的Action，那么BroadcastReceiver将的onReceive(Context context, Intent intent)将收不到通知，除非你在发送的时候指明的具体的Class:

Intent intent = new Intent(MyActivity.this,MyReceiver.class);
sendBroadcast(intent);