BroadCastRecevier使用

1 Intent intent =new Intent();
2                 intent.setAction("123");
3                 intent.putExtra("msg","简单的消息");
4                 sendBroadcast(intent);    

1  <receiver android:name=".MyReceiver"
2                   android:exported="false">
3             <intent-filter>
4                 <action  android:name="123"  />
5                 </intent-filter>>
6         </receiver>