問題描述

在廣播接收器（BroadcastReceiver）的onReceive(Context context, Intent intent)方法中彈出一個AlterDialog

方案一

美中不足之處：

• 二、7.0及以上無法執行

方案二

public class TestActivity extends Activity {

    public static final String ACTION = "cn.com.servyou.secondlinecode.MY_BROADCAST";

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

        IntentFilter filter = new IntentFilter(ACTION);
        registerReceiver(receiver, filter);
    }

    BroadcastReceiver receiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            new
 
 AlertDialog.Builder(TestActivity.this)
                    .setTitle("dialog")
                    .setMessage("received in MyBroadcastReceiver!")
                    .setPositiveButton("確定", null)
                    .create()
                    .show();
        }
    };
}

美中不足：

• 動態註冊廣播接收器（BroadcastReceiver），需要確保接收器已註冊
• 彈窗只能顯示在當前app視窗（無法全域性）