AlarmManager RepeatingAlarm射击次数不超过一次

Question

好的，我有一个背景刷新，用户可以在设置中切换。以下是Settings活动的代码：

intent  = new Intent(context, UpdateScoresService.class);
recurringDownloadDaily = PendingIntent.getService(context,0,intent, 0);
recurringDownloadWeekly = PendingIntent.getService(context, 1, intent, 0);
 Preference.OnPreferenceChangeListener refreshListener = new Preference.OnPreferenceChangeListener() {
                @Override
                public boolean onPreferenceChange(Preference preference, Object newValue) {
                    if(newValue.toString().equals("1")){ /* daily */
                        background_refresh.setSummary("Scores will be refreshed daily.");

                        AlarmManager manager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
                        manager.cancel(recurringDownloadDaily);
                        manager.cancel(recurringDownloadWeekly);
                        Log.e("DAILY REFRESH", " ");
                        Calendar calendar = Calendar.getInstance();
                        calendar.setTimeInMillis(System.currentTimeMillis());
                        calendar.set(Calendar.HOUR_OF_DAY,10);
                        calendar.set(Calendar.MINUTE,00);
                        if(calendar.before(Calendar.getInstance())){
                            Log.e("AFTER", "10 AM DAILY");
                            calendar.add(Calendar.DATE, 1);
                        }
                        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, recurringDownloadDaily);
                    }else if(newValue.toString().equals("2")){ /* weekly */
                        Log.e("WEEKLY REFRESH", " ");
                        background_refresh.setSummary("Scores will be refreshed weekly.");
                        AlarmManager manager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
                        manager.cancel(recurringDownloadDaily);
                        manager.cancel(recurringDownloadWeekly);
                        Calendar calendar = Calendar.getInstance();
                        calendar.setTimeInMillis(System.currentTimeMillis());
                        calendar.set(Calendar.HOUR_OF_DAY,10);
                        calendar.set(Calendar.MINUTE,00);
                        if(calendar.before(Calendar.getInstance())){
                            Log.e("AFTER", "10 AM WEEKLY");
                            calendar.add(Calendar.DATE, 1);
                        }
                        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY * 7, recurringDownloadWeekly);
                    }else{ /* manually */
                        background_refresh.setSummary("Scores will be refreshed manually.");
                        Log.e("MANUAL REFRESH", " ");
                        AlarmManager manager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
                        manager.cancel(recurringDownloadDaily);
                        manager.cancel(recurringDownloadWeekly);
                    }
                    return true;
                }
            };
            background_refresh.setOnPreferenceChangeListener(refreshListener);

如果用户设置了每天的警报，我希望它每天早上10点刷新。为了进行测试，当我将日期设置为第二天并将时间设置为9:59AM时，警报会在上午10点左右触发。并且可以手动更改手机上的日期和时间，每次都会触发。然而，如果我设定了选择，只需等到第二天，警报器可能会或不会开火。我觉得更多的时候，它不会发生。

我还需要知道设备何时完成启动，以便在设备关闭和重新打开后重新调度警报：

public void onReceive(Context context, Intent intent) {
        Log.e("Boot reciever", "a");
        if(intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
//            Toast.makeText(context, "Boot Reciever", Toast.LENGTH_SHORT).show();
            Log.e("Boot reciever", "b");
            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
            intent1  = new Intent(context, UpdateScoresService.class);
            recurringDownload = PendingIntent.getService(context,0,intent1, 0);

            String refreshRate = sharedPreferences.getString("background_refresh", "1");

            if(refreshRate.equals("1")){ /* daily */
                daily(context);
            }else if(refreshRate.equals("2")){ /* weekly */
                weekly(context);
            }else { /* manually */
                manually(context);
            }

        }
    }

    public void daily(Context context){
        Log.e("DAILY REFRESH", "BRUH!");
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.HOUR_OF_DAY,10);
        calendar.set(Calendar.MINUTE,00);
        if(calendar.before(Calendar.getInstance())){
            Log.e("AFTER", "10 AM WEEKLY");
            calendar.add(Calendar.DATE, 1);
        }
        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, recurringDownload);
    }
    public void weekly(Context context){
        Log.e("WEEKLY REFRESH", "BRUH!");
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.HOUR_OF_DAY,10);
        calendar.set(Calendar.MINUTE,00);
        if(calendar.before(Calendar.getInstance())){
            Log.e("AFTER", "10 AM WEEKLY");
            calendar.add(Calendar.DATE, 1);
        }
        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY * 7, recurringDownload);
    }

    public void manually(Context context){
        Log.e("MANUAL REFRESH", "BRUH!");
        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        manager.cancel(recurringDownload);
    }

据我所知，如果我在9点55分关机并重新启动手机，这个服务也能正常工作。

问题是，它没有在第二天或第二天运行。我不太清楚为什么，也许这个服务在幕后被杀了？我正在考虑在MainActivity的onResume中添加相同的代码来重新安排警报，但这似乎有点过了，我应该能够让它在不这样做的情况下持续运行。

Answer 1

不确定，但请检查以下各点：

1. 创建了两个具有0&1 id的唯一警报，但在启动完成后，只用0 id重新启动一个警报。
2. 当使用日期更改的重复警报进行测试时，可能会出现问题。因为那一天的警报可能会被触发，然后你已经更改为以前的日期，它不会再次触发，直到重新启动它。
3. 在启动完成或分配任何警报时，在分配给它之前，必须取消该暂挂意图的先前警报。
4. 您的服务不会因为它们尚未启动而被终止，因为挂起的意图将被触发。

如果您仍然面临问题，请检查此博客。(不知道哪里出了问题，所以张贴我的博客URL作为参考)