在Android 4上重复通知

Question

目标:如果满足某些条件,通知每天下午2点出现一次.

示例:为简单起见,我们考虑每天都满足使用Internet连接检查的条件.如果今天已经在下午2点之后,我们将从明天开始通知.例如,用户在星期一下午4点启动应用程序,并在周二下午2点,周三下午2点,周四下午2点获得通知,依此类推.

问题:下午2点有第一个通知,但随后我会一遍又一遍地收到相同的通知.

问题似乎只在Android> = 4.0上.它在早期的机器人上运行良好.

这是我发送通知的方式:

public class NotifyService extends Service
{       
static final int NOTIFICATION_ID = 1;
// ...

@Override
public IBinder onBind(Intent intent)
{
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
    try
    {
        Symbol biggest = getBiggestMover();
        if (biggest != null)
        {
            String title = getString(R.string.app_name);
            String text = getNotificationText(biggest.symbol, biggest.change);
            sendNotification(title, text);
        }
    }
    catch (Exception e)
    {
        // If there is Internet problem we do nothing, don't want to disturb the user.
        e.printStackTrace();
    }

    return super.onStartCommand(intent, flags, startId);
}

/** @return Symbol which is the biggest mover today. If there is no big mover - null is returned.
 * @throws Exception If there is Internet problem. */
private Symbol getBiggestMover() throws Exception
{
    Symbol biggest = null;
    Symbol[] equities = Network.getTraded(SymbolType.EQUITY);
    for (Symbol equity : equities)
    {
        if (Utilities.isToday(equity.lastTraded) && isBigMove(equity.change) && isBigger(equity, biggest))
        {
            biggest = equity;
        }
    }
    return biggest;
}   

private void sendNotification(String title, String text)
{
    Notification notification = new Notification(R.drawable.ic_launcher, text, System.currentTimeMillis());
    notification.flags = Notification.FLAG_AUTO_CANCEL;

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

    notification.setLatestEventInfo(this, title, text, pendingIntent);

    NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    manager.notify(NOTIFICATION_ID, notification);
}   
// ...  
}

sendNotification()在下午2点被叫,因为AlarmManager:

public class ServiceStarter extends BroadcastReceiver
{

@Override
public void onReceive(Context context, Intent intent)
{
    setNotificationAlarm(context);
}

/** Set repeating notifications every 24 hours. */
public static void setNotificationAlarm(Context context)
{
    Intent intent = new Intent(context, NotifyService.class);
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);

    final int oneDay = 24 * 60 * 60 * 1000;
    alarmManager.setRepeating(AlarmManager.RTC, getTriggerTime(), oneDay, pendingIntent);
}

private static long getTriggerTime()
{
    GregorianCalendar calendar = new GregorianCalendar();
    calendar.set(GregorianCalendar.HOUR_OF_DAY, 14);
    calendar.set(GregorianCalendar.MINUTE, 0);
    calendar.set(GregorianCalendar.SECOND, 0);
    calendar.set(GregorianCalendar.MILLISECOND, 0);

    if (calendar.before(new GregorianCalendar()))
    {
        calendar.add(GregorianCalendar.DAY_OF_MONTH, 1);
    }

    return calendar.getTimeInMillis();
}

}

setNotificationAlarm()被叫2个地方.首先,在应用程序的开头.其次,从上面的代码中,当手机重新启动(onReceive()接收BOOT_COMPLETED)时.我这样做,因为当用户关闭手机时,AlarmManager清除其警报.

所以一切都应该有效,因为它alarmManager.setRepeating()会覆盖先前的警报.

我发现有人有同样的问题,但也没有答案:https://groups.google.com/forum/？fromgroups =#!topic/android- Developers/
t_tDU4PwR3g

在这里我也发现了类似的问题:http: //comments.gmane.org/gmane.comp.handhelds.android.devel/171471

前段时间我问过如何创建这样的通知,所以这是相关的:
在特定时间的日常通知

Answer 1

使用 AlarmManager.RTC_WAKEUP 代替 AlarmManager.RTC

在AlarmManager.RTC中

System.currentTimeMillis() 中的闹钟时间（UTC 格式的挂钟时间）。该闹钟不会唤醒设备；如果它在设备睡眠时熄灭，则直到设备下次唤醒时才会传递。

如 AlarmManager.RTC_WAKEUP 中所示

System.currentTimeMillis() 中的闹钟时间（UTC 中的挂钟时间），闹钟响起时会唤醒设备。