Question

我在App上使用多个闹钟。每次打开应用程序我设置4警报，但如果设置警报然后我已删除所有警报并再次设置。设置闹钟时这是我的代码：

public static void setAlarm(Context context, int hour, int minute, boolean addDay, int i) {
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Activity.ALARM_SERVICE);
    Intent intent = new Intent(context, AlarmReceiver.class);
    Calendar calendar = Calendar.getInstance();
    if (addDay) {
        calendar.add(Calendar.DATE, 1);
    }
    int idRequest = Integer.parseInt(hour+""+minute);
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, 0);

    intent.putExtra(TYPE_ALARM, i);
    intent.putExtra(HOUR, hour);
    intent.putExtra(MINUTE, minute);
    intent.putExtra(REQUEST_CODE, (int) calendar.getTimeInMillis());
    PendingIntent pendingIntent = PendingIntent.getBroadcast(context,
            idRequest, intent, PendingIntent.FLAG_NO_CREATE);
    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, pendingIntent);
    Log.d("Set Alarm", hour + ": " + minute +" "+ calendar.get(Calendar.AM_PM) + calendar.get(Calendar.DAY_OF_MONTH) + "/" +
            (calendar.get(Calendar.MONTH) + 1)+" idPedding: "+idRequest);

}

Android删除所有闹钟：

public static void cancleAlarm(Context context, int hour, int minute, int i) {
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Activity.ALARM_SERVICE);
    Intent intent = new Intent(context, AlarmReceiver.class);
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, 0);
    intent.putExtra(TYPE_ALARM, i);
    intent.putExtra(HOUR, hour);
    intent.putExtra(MINUTE, minute);
    intent.putExtra(REQUEST_CODE, calendar.getTimeInMillis());
    int idRequest = Integer.parseInt(hour+""+minute);
    PendingIntent pendingUpdateIntent = PendingIntent.getBroadcast(context, idRequest,
            intent, PendingIntent.FLAG_NO_CREATE);
    // Cancel alarms
    try {
        alarmManager.cancel(pendingUpdateIntent);
        Log.d(TAG, "Cancle-PeddingCodeGet: " + i);
    } catch (Exception e) {
        Log.e(TAG, "AlarmManager update was not canceled. " + e.toString());
    }
    Log.d("cancle Alarm", hour + ":" + minute +" "+ calendar.get(Calendar.AM_PM) + calendar.get(Calendar.DAY_OF_MONTH) + "/" +
            (calendar.get(Calendar.MONTH) + 1)+" idPedding: "+idRequest);
}

但是，当我删除所有警报时，我调试看到PendingIntent总是null。虽然，在我设置列表警报之前。我无法检查它是否已经完成。那么，如何删除警报列表？

为什么取消后此PendingIntent为null？

0 个答案: