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);