Question

我正在尝试在新应用程序中使用CommonsWare的WakefulIntentService，特别是它能够轻松安排意图服务以便以后运行。

我有一个PreferenceActivity，允许用户选择运行服务的计划（例如每天早上5点）。一旦用户更改了首选项值，我就会调用：

AutoDownloadIntentServiceAlarmListener alarmListener = new AutoDownloadIntentServiceAlarmListener();
alarmListener.setForcedHour(5);  // we want to schedule alarm for 5am everyday.

WakefulIntentService.scheduleAlarms(alarmListener, this, true);

出于某种原因，所需的IntentService（扩展WakefulIntentService）会立即启动并执行其工作。

以下是AutoDownloadIntentServiceAlarmListener的实现：

public class AutoDownloadIntentServiceAlarmListener implements WakefulIntentService.AlarmListener {

private static final String TAG = "AutoDownloadIntentServiceAlarmListener";
    private int mForcedHour = -1;

    @Override
    public long getMaxAge() {
        return AlarmManager.INTERVAL_DAY * 2;
    }

    public void setForcedHour(int forcedHour) {
        mForcedHour = forcedHour;
    }

    @Override
    public void scheduleAlarms(AlarmManager alarmManager, PendingIntent pendingIntent, Context context) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        String autoDownloadTimePref = MyApplication.getInstance().getPrefs().getString("autoDownloadEpisodesSchedule", "0");

        int hourOfAlarm = Integer.parseInt(autoDownloadTimePref);
            // if this class has been created with a specific hour
            // use it instead of the value obtained from SharedPreferences above.
        if (mForcedHour > -1) {
            Log.w(TAG, "Forced hour has been set for this AlarmListener. " + mForcedHour);
            hourOfAlarm = mForcedHour;
        }
        calendar.set(Calendar.HOUR_OF_DAY, hourOfAlarm);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);

        alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);

        Log.d(TAG, String.format("Scheduled inexact alarm for %d", hourOfAlarm));
    }

    @Override
    public void sendWakefulWork(Context context) {
        Intent serviceIntent = new Intent(context, AutoDownloadIntentService.class);

        WakefulIntentService.sendWakefulWork(context, serviceIntent);
    }

}

我的意图是服务不会在安排后立即启动，而是在第二天凌晨5点启动。（并继续无限期地重复此计划，或直到用户选择禁用或更改其计划）

我做错了什么？

Answer 1

我的意图是服务不会在安排后立即启动，而是在第二天凌晨5点启动。

除了这不是你的代码所做的，大约80％的时间。您的代码表示它应该在今天凌晨5点运行，因为您获得当前时间而不是更改当天。大部分时间，今天凌晨5点都是过去，所以AlarmManager将立即开始工作。

您需要查看计算出的Calendar是否比现在更早，如果是，请添加一天。

WakefulIntentService在安排后立即启动

1 个答案: