LocalBroadcastReceiver

LocalBroadcastReceiver 相对 于BroadcastReceiver，它只能用于应用内通信，安全性更好，更高的运行效率。也是需要发送应用内广播时的官方所推荐的方式。
①首先先说一下于BroadcastReceiver的区别：BroadcastReceiver的通信是走 Binder 机制的，而 LocalBroadcastManager 不是，点进源码去看看吧。
②先自定义 BroadcastReceiver 子类：
public class LocalBroadcastReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    localMsg.setText(intent.getStringExtra(MSG_KEY));
}

}
③注册接收器：

LocalBroadcastReceiver localReceiver = new LocalBroadcastReceiver();
LocalBroadcastManager.getInstance(context).registerReceiver(localReceiver,
new IntentFilter(ACTION_LOCAL_SEND));

④发送广播：

LocalBroadcastManager.getInstance(context).sendBroadcast(new
Intent(ACTION_LOCAL_SEND));

⑤取消注册：

LocalBroadcastManager.getInstance(context).unregisterReceiver(localReceiver);