android - 使用 Alarmmanager 在特定时间启动服务

Question

我搜索了很多地方，但找不到关于如何在每天的特定时间使用 AlarmManager 启动服务（或者如果那不可能，那么是活动）的清晰顺序解释？

我想注册几个这样的警报并触发它们应该会导致服务启动。我将在服务中有一小段代码，然后可以执行，我可以永久完成服务......

Calendar cal = Calendar.getInstance();
Calendar cur_cal = Calendar.getInstance();
cur_cal.setTimeInMillis(System.currentTimeMillis());
Date date = new Date(cur_cal.get(Calendar.YEAR), cur_cal.get(Calendar.MONTH), cur_cal.get(Calendar.DATE), 16, 45);
cal.setTime(date);
Intent intent = new Intent(ProfileList.this, ActivateOnTime.class);
intent.putExtra("profile_id", 2);
PendingIntent pintent = PendingIntent.getService(ProfileList.this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pintent);
System.out.println("The alarm set!!");

我尝试使用此代码在 4.45 激活警报...但它没有触发服务...我必须保持进程运行吗？我做错什么了吗？？？

还有一件事，如果我使用以下代码，我的服务将得到完美执行：

long firstTime = SystemClock.elapsedRealtime();
alarm.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstTime, 30*1000,pintent);

score 37 · Accepted Answer

HI friends, After a lot of researching and with reference from "Pentium10"'s question on the same topic i managed to get it working. Though i still cant understand why the "date" concept and the Calendar(non GregorianCalendar) object which i have mentioned in the question are not working correctly.

Calendar cur_cal = new GregorianCalendar();
cur_cal.setTimeInMillis(System.currentTimeMillis());//set the current time and date for this calendar

Calendar cal = new GregorianCalendar();
cal.add(Calendar.DAY_OF_YEAR, cur_cal.get(Calendar.DAY_OF_YEAR));
cal.set(Calendar.HOUR_OF_DAY, 18);
cal.set(Calendar.MINUTE, 32);
cal.set(Calendar.SECOND, cur_cal.get(Calendar.SECOND));
cal.set(Calendar.MILLISECOND, cur_cal.get(Calendar.MILLISECOND));
cal.set(Calendar.DATE, cur_cal.get(Calendar.DATE));
cal.set(Calendar.MONTH, cur_cal.get(Calendar.MONTH));
Intent intent = new Intent(ProfileList.this, IntentBroadcastedReceiver.class);
PendingIntent pintent = PendingIntent.getService(ProfileList.this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);

score 8 · Accepted Answer

//Create alarm manager
AlarmManager alarmMgr0 = (AlarmManager)getSystemService(Context.ALARM_SERVICE);

//Create pending intent & register it to your alarm notifier class
Intent intent0 = new Intent(this, AlarmReciever.class);
PendingIntent pendingIntent0 = PendingIntent.getBroadcast(this, 0, intent0, 0);

//set timer you want alarm to work (here I have set it to 7.20pm)
Intent intent0 = new Intent(this, OldEntryRemover.class);
Calendar timeOff9 = Calendar.getInstance();
timeOff9.set(Calendar.HOUR_OF_DAY, 19);
timeOff9.set(Calendar.MINUTE, 20);
timeOff9.set(Calendar.SECOND, 0);

//set that timer as a RTC Wakeup to alarm manager object
alarmMgr0.set(AlarmManager.RTC_WAKEUP, timeOff0.getTimeInMillis(), pendingIntent0);

然后在作为广播接收器的 AlarmReciever 类中，在 onRecieve 方法下放置您的逻辑。当时间到 7.20 pm 时，这将处理您想要处理的任何逻辑。

如果您需要设置多个闹钟，请创建另一个日历实例并适当地设置时间值。您还需要为 pendingIntent 创建另一个实例，否则计时器将重叠。然后将其设置为具有新计时器和pendingIntent 的相同alarmManager。

score 5 · Accepted Answer

您可以从https://developer.android.com/training/scheduling/alarms.html阅读文档

private AlarmManager alarmMgr;
private PendingIntent alarmIntent;

alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

// 设置闹钟在早上 8:30 开始

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 8);
calendar.set(Calendar.MINUTE, 30);

// setRepeating() 允许您指定精确的自定义间隔——在本例中为 // 20 分钟。

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

score 2 · Accepted Answer

以下代码应该可以正常工作，并且每天晚上 7:40 都会启动服务。此外，如果设备关闭，那么您的所有警报都会被取消。

确保在 BOOT 完成后设置所有警报。

Intent slIntent = new Intent(this, x.class);

Calendar calendar = Calendar.getInstance(); 
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 19);
calendar.set(Calendar.MINUTE, 40);
calendar.set(Calendar.SECOND, 0);

PendingIntent slPendingIntent = PendingIntent.getService(this, 1, slIntent, PendingIntent.FLAG_ONE_SHOT);

AlarmManager alarmManager=(AlarmManager) getSystemService(Context.ALARM_SERVICE);

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                          AlarmManager.INTERVAL_DAY, slPendingIntent);

score 1 · Accepted Answer

我尝试了很多按时启动服务所以我有一个解决方案

从日期选择器“Return Long timeMileSec = Milliseconds”计算当前时间和选定时间之间的差异

在此之后在其中创建一个处理程序并在“毫秒”秒时休眠

new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        CreateService();
        getActivity().startService(intentServiceObj);
    }
}, timeMileSec);


// Below is the service Methods.
private void CreateService() {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(System.currentTimeMillis());

    cal.add(Calendar.DAY_OF_YEAR, year);
    cal.set(Calendar.HOUR_OF_DAY, hourScreen);
    cal.set(Calendar.MINUTE, minuteScreen);

    // cal.setTimeInMillis(timeselectedmillisecond);

    Intent intent = new Intent(getActivity(),
        ServiceDailyLocationUpdate.class);
    pintent = PendingIntent.getService(getActivity(), 0, intent, 0);

    alarm = (AlarmManager) getActivity().getSystemService(
        Context.ALARM_SERVICE);

    alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.HOUR, 86000 * 1000,
        pintent);

}

// Return Differnce between two date
private long calculateDateDiffSecond(String firstDate, String secondDate) {

    long numberOfDays = 0;

    String dateStart = firstDate;
    String dateStop = secondDate;

    Date d1 = null;
    Date d2 = null;

    try {
        d1 = sdfTime.parse(dateStart);
        d2 = sdfTime.parse(dateStop);

        // in milliseconds
        long diff = d2.getTime() - d1.getTime();

        long diffSeconds = diff / 1000 % 60;
        long diffMinutes = diff / (60 * 1000) % 60;
        long diffHours = diff / (60 * 60 * 1000) % 24;
        long diffDays = diff / (24 * 60 * 60 * 1000);

        System.out.print(diffDays + " days, ");
        System.out.print("Hours::" + diffHours + " hours, ");
        System.out.print("HoursMinute::" + diffMinutes + " minutes, ");
        System.out.print(diffSeconds + " seconds.");
        numberOfDays = diffDays;
        numberOfDays = diff;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return numberOfDays;

}

score 1 · Accepted Answer

上面的代码不起作用，下面的代码对我有用。

月减少 1. 和小时 0-11。

int day = ff.getGregorianDay() ;
int month = ff.getGregorianMonth() ;
int year = ff.getGregorianYear();
int hour = TimePicker1.getCurrentHour();
int minute = TimePicker1.getCurrentMinute();

Calendar cal_alarm = Calendar.getInstance(); 
cal_alarm.setTimeInMillis(System.currentTimeMillis() );
cal_alarm.set(Calendar.YEAR, year);
cal_alarm.set(Calendar.MONTH, month-1);
cal_alarm.set(Calendar.DAY_OF_MONTH, day);


cal_alarm.set(Calendar.AM_PM, Calendar.AM );
cal_alarm.set(Calendar.HOUR, hour);

if( hour >= 12){
    cal_alarm.set(Calendar.AM_PM, Calendar.PM );
    cal_alarm.set(Calendar.HOUR, hour-12);
} 
cal_alarm.set(Calendar.MINUTE, minute );
cal_alarm.set(Calendar.SECOND, 0 );

Intent myIntent = new Intent(YadavariNewActivity.this, Alarm_Sag.class); 
PendingIntent pendingIntent = PendingIntent.getBroadcast(YadavariNewActivity.this, 0, myIntent,0);

AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set( AlarmManager.RTC_WAKEUP, cal_alarm.getTimeInMillis(),  pendingIntent);

android - 使用 Alarmmanager 在特定时间启动服务

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