在Android中每小时设置重复的警报管理器 [英] set repeated alarm manager for every hour in android

问题描述

我想每小时在android中获取位置。为此，我使用警报管理器并设置每小时重复警报，只想在修复时间之后即8 AM和12 PM写入文件。
我在设置警报管理器时遇到问题，虽然我每隔一小时设置一次，但它在1/2小时内执行。

I want to fetch location every hours in android . For that i use alarm manager and set repeated alarm for every hour and just want to write into file after fix time i.e at 8 AM and 12 PM . I got a problem in setting alarm manager , while i set for every one hour but it execute in 1/2 hour .

on button click i start service :

       serviceButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            Intent myIntent = new Intent(AutoMainActivity.this, TrackerService.class);

            pendingIntent = PendingIntent.getService(AutoMainActivity.this, 0, myIntent, 0);

            AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
            alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, ALARM_TRIGGER_AT_TIME,
                    3600000, pendingIntent);

            //3600000 1hrs

            finish();
        }
    });

服务等级如下：

Tracker Service.class

String FINAL_STRING;
SharedPreferences pref;
static final int START_TIME = 8;
static final int MID_TIME = 12;

    java.util.Date systemDates = Calendar.getInstance().getTime(); 
    int hour = Calendar.getInstance().get(Calendar.HOUR_OF_DAY);

    if(hour == START_TIME)
        {
            edit.putString("smsdata", FINAL_STRING);
            edit.commit();

            //sendSms(START_TAG+pref.getString("smsdata", ""));
            edit.putString("smsdata", "");
            edit.commit();
        }else {

            System.out.println("currentdate:"+simpleDateFormat.toString());
            System.out.println("current_time:"+currentTime);

            Editor edit = pref.edit();
            edit.putString("smsdata", pref.getString("smsdata", "")+FINAL_STRING+"#");
            edit.commit();

            if(hour==MID_TIME)
            {
                //sendSms(START_TAG+pref.getString("smsdata", ""));
                generateNoteOnSD("\n"+START_TAG+pref.getString("smsdata", ""));
                edit.putString("smsdata", "");
                edit.commit();
                System.out.println("mid time");

            }

        }

我执行时该服务每30分钟启动一次。但是我想每60分钟一次。

When i execute this the service start on every 30min. but i want on every 60min.

推荐答案

setInexactRepeating（）是其无法按预期工作的原因。尝试以下操作：

setInexactRepeating() is the reason why it is not working as you expected. Try following:

AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, firstStart, interval, pendingIntent );

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