Android動態廣播的注冊與銷毀

一個內部類：BroadcastReceiver的子類，並定義收到廣播之后的操作：

class LockScreenBroadcastReceiver extends BroadcastReceiver{

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

定義action和BroadcastReceiver子類對象：

//定義關閉此activity的action
    public static final String NIGHT_REST_ACTIVITY_FINISH = "night_rest_activity_finish";
    private LockScreenBroadcastReceiver broadcastReceiver;

 

onCreate中注冊：

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

        // 1. 實例化BroadcastReceiver的子類對象
        broadcastReceiver = new LockScreenBroadcastReceiver();
        IntentFilter intentFilter = new IntentFilter();
        // 2. 設置接收廣播的類型
        intentFilter.addAction(NIGHT_REST_ACTIVITY_FINISH);// 只有持有相同的action的接受者才能接收此廣播
        // 3. 動態注冊：調用Context的registerReceiver（）方法
        registerReceiver(broadcastReceiver, intentFilter);
    }

onDestroy中注銷：

 //銷毀onResume()中的廣播
        unregisterReceiver(broadcastReceiver);