android - 如何设置通知在 X 分钟后显示？

Question

我已经设法让我的通知在按下按钮时弹出，但我现在想进一步开发它，以便在按下按钮后 X 分钟(或 Y 小时)后通知不会弹出按下。

相关代码:

private void sendNotif() {
    notification.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.avatar));
    notification.setTicker("Kayla has returned");
    notification.setWhen(System.currentTimeMillis());
    notification.setContentTitle("Kayla has returned");
    notification.setContentText("See what news she has to share");

    Intent notifIntent = new Intent(this, MainActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notifIntent, PendingIntent.FLAG_CANCEL_CURRENT);
    notification.setContentIntent(pendingIntent);

    NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    nm.notify(notifId, notification.build());
}

private void setNotif() {
    Button btn = (Button) findViewById(R.id.notifBtn);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendNotif();
        }
    });
}

我认为我需要以某种方式使用 AlarmManager，但我似乎无法将它合并到通知中......

Answer 1

您想将其设置为将来的特定时间。例如，如果当前是中午 12:00，而您希望在 10 分钟后到达，请将闹钟设置为中午 12:10。所以总是得到当前时间+你想等多久直到闹钟响起。这是一个例子。如果您想每 20 分钟重复一次该警报，我还包括在内。

private AlarmManager alarmMgr;
private PendingIntent alarmIntent;

private void setAlert(int hour, int minute) {
  alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
  Intent intent = new Intent(context, AlarmReceiver.class);
  alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

  Calendar calendar = Calendar.getInstance();
  calendar.setTimeInMillis(System.currentTimeMillis());
  calendar.set(Calendar.HOUR_OF_DAY, hour);
  calendar.set(Calendar.MINUTE, minute);

  alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
    1000 * 60 * 20, alarmIntent);
}

发送通知:

public void showNotification(Context context) {

  NotificationCompat.Builder mBuilder =
   new NotificationCompat.Builder(context)
   .setSmallIcon(R.drawable.notification_icon)
   .setContentTitle("Notification  Title")
   .setContentText("Notification Text");

  NotificationManager mNotificationManager =
  (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

  NotificationManager.notify().

  mNotificationManager.notify(001, mBuilder.build());
}

在您当前调用 toast 的地方调用 sendNotification

确保从您的接收器获取上下文

@Override
public void onReceive(Context context, Intent arg1) {
    showNotification(context);
}