静态和动态两种注册方法：
- 静态注册, 在AndroidManifest.xml中加上<Receiver>标签。
- 动态注册, 通过 Context.registerReceiver()方法进行注册。比如在onResume中注册，在onPause中注销。
public class MyReceiver extends BroadcastReceiver{
public MyReceiver() {
super();
Log.d(AppConstants.LOG_TAG, "Receiver constructor");
}
@Override
public void onReceive(Context context, Intent intent) {
Log.d(AppConstants.LOG_TAG, "onReceive");
String message = intent.getStringExtra("msg");
Log.i(AppConstants.LOG_TAG, message);
Toast.makeText(context, "Received! msg: " + message, Toast.LENGTH_SHORT).show();
}
}
发送广播
public static final String BROADCAST_ACTION ="com.example.demobroadcast.BroadcastAction";
Intent intent = new Intent();
intent.setAction(BROADCAST_ACTION);
intent.putExtra("msg", "发送广播");
sendBroadcast(intent);
动态注册
@Override protected void onResume() {
super.onResume();
mReceiver = new MyReceiver();
IntentFilter intentFilter= new
IntentFilter(BROADCAST_ACTION); registerReceiver(mReceiver,
intentFilter);
}
@Override protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
静态注册
<receiver
android:name="com.example.demobroadcast.MyReceiver">
<intent-filter >
<action android:name="com.example.demobroadcast.BroadcastAction" />
</intent-filter>
</receiver>