AlarmManager 没有在日历设置的时间醒来

Question

我已经使用日历将 alarmManager 设置为在早上 8 点准时唤醒。我将日历字段设置为

alarmStartTime.set(Calendar.HOUR_OF_DAY, 8);
        alarmStartTime.set(Calendar.MINUTE, 00);
        alarmStartTime.set(Calendar.SECOND, 00);

并像

一样调用了 alarmManger

alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, alarmStartTime.getTimeInMillis(), getInterval(), pendingIntent);

它不会在 8:00 醒来。每当我运行第一次使用该应用程序时，无论我在日历中设置什么时间，都会立即收到通知并调用

alarmStartTime.getTimeInMillis()

为什么不是在准确的时间开始？

Answer 1

试试这个：

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 8);
calendar.set(Calendar.MINUTE, 00);
calendar.set(Calendar.SECOND, 00);

Intent alarmintent = new Intent(AddAlarm.this, AlarmReceiver.class); //Intent to Broadcast receiver class

        PendingIntent sender = PendingIntent.getBroadcast(AddAlarm.this, pen, alarmintent, PendingIntent.FLAG_ONE_SHOT);

        AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

而在广播接收器中，即AlarmReceiver.class，你可以这样做：

    public class AlarmReceiver extends WakefulBroadcastReceiver {

    @Override
    public void onReceive(final Context context, Intent intent) {
        //this will update the UI with message
        AlarmActivity inst = AlarmActivity.instance();
        inst.setAlarmText("Alarm! Wake up! Wake up!");

        //this will sound the alarm tone
        //this will sound the alarm once, if you wish to
        //raise alarm in loop continuously then use MediaPlayer and setLooping(true)
        Uri alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
        if (alarmUri == null) {
            alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        }
        Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
        ringtone.play();

        //this will send a notification message
        ComponentName comp = new ComponentName(context.getPackageName(),
                AlarmService.class.getName());
        startWakefulService(context, (intent.setComponent(comp)));
        setResultCode(Activity.RESULT_OK);
    }
}

希望对您有所帮助！编码愉快。

Answer 2

试试下面的代码，它会对你有所帮助。

Intent alarmIntent = new Intent(context, AlarmReceiver.class);

PendingIntent pendingIntent = PendingIntent.getBroadcast(context, stid, alarmIntent, 0);

AlarmManager manager = (AlarmManager) context.getSystemService(Context. ALARM_SERVICE);

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 8);
calendar.set(Calendar.MINUTE, 05);

/* Repeating on every 20 minutes interval */
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),1000 * 60 * 60 *24, pendingIntent);

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