Android动态广播的注册与销毁

一个内部类：BroadcastReceiver的子类，并定义收到广播之后的操作：

 class LockScreenBroadcastReceiver extends BroadcastReceiver{

         @Override
         public void onReceive(Context context, Intent intent) {
             //接收到广播之后的操作
             KLog.d("收到广播");
             LockScreenNightRestActivity.this.finish();
         }
     }

定义action和BroadcastReceiver子类对象：

 //定义关闭此activity的action
     public static final String NIGHT_REST_ACTIVITY_FINISH = "night_rest_activity_finish";
     private LockScreenBroadcastReceiver broadcastReceiver;

onCreate中注册：

 @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         // 1. 实例化BroadcastReceiver的子类对象
         broadcastReceiver = new LockScreenBroadcastReceiver();
         IntentFilter intentFilter = new IntentFilter();
         // 2. 设置接收广播的类型
         intentFilter.addAction(NIGHT_REST_ACTIVITY_FINISH);// 只有持有相同的action的接受者才能接收此广播
         // 3. 动态注册：调用Context的registerReceiver（）方法
         registerReceiver(broadcastReceiver, intentFilter);
     }

onDestroy中注销：

  //销毁onResume()中的广播
         unregisterReceiver(broadcastReceiver);