我對(duì) Android 開發(fā)還很陌生。當(dāng)應(yīng)用程序處于后臺(tái)時(shí)，我已經(jīng)能夠收到彈出通知。當(dāng)我點(diǎn)擊它時(shí)，它成功加載了應(yīng)用程序備份。但是，我想從頁面加載警報(bào)，但僅當(dāng)它從通知點(diǎn)擊打開時(shí)才加載。下面是生成通知的代碼。任何幫助，將不勝感激。private void getNotificationForPasswordChange() {    NotificationManager mNotificationManager =            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {        CharSequence name = "Hello";// The user-visible name of the channel.        int importance = NotificationManager.IMPORTANCE_HIGH;        NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);        if (mNotificationManager != null)            mNotificationManager.createNotificationChannel(mChannel);    }    Bitmap icon = BitmapFactory.decodeResource(getResources(),            R.mipmap.ic_launcher);    Intent i=new Intent(this, MainActivity.class);    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);    PendingIntent mainIntent = PendingIntent.getActivity(this, 0,            i, PendingIntent.FLAG_UPDATE_CURRENT);    Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)            .setContentTitle("Pronto Tracker")            .setTicker("Pronto Tracker")            .setContentText("Cannot connect to server. Location is not being updated.")            .setSmallIcon(R.mipmap.ic_pronto_logo)            .setLargeIcon(Bitmap.createScaledBitmap(icon, 128, 128, false))            .setOngoing(true).setContentIntent(mainIntent).                    build();    mNotificationManager.notify(Constants.PASSWORD_CHANGE_NOTIFICATION_ID, notification);}