Question

嗨！

我在复制PendingIntents方面遇到了麻烦。我的应用程序具有从应用程序onCreate开始的服务，执行一些异步任务并自行停止。问题是，在每个应用程序启动时，我在AlarmManager中都有一组来自DB的新PendingIntents（完全相同），但即使使用FLAG_CANCEL_CURRENT，它们也不会取消之前的。我通过“adb shell dumpsys alarm”确定了这一点，
这是一个异步任务的onPostExecute： protected void onPostExecute（Cursor c） {

        while (c.moveToNext())
        {
            int _id = c.getInt(c.getColumnIndex(Maindb._ID));
            long remind_timestamp = c.getLong(c
                    .getColumnIndex(Maindb.REMIND_TIMESTAMP));
            String remind_name = c.getString(c.getColumnIndex(Maindb.NAME));
            String remind_description = c.getString(c
                    .getColumnIndex(Maindb.DESCRIPTION));

            Log.i("Service reminders : id = " + _id + "; REMIND_TIMESTAMP="
                    + remind_timestamp + "; NAME = " + remind_name
                    + "; DESCRIPTION=" + remind_description);

            Intent myIntent = new Intent(ReminderService.this,
                    AlarmReceiver.class);

            myIntent.putExtra(RemindDialog.REMIND_DIALOG_ID, _id);
            myIntent.putExtra(RemindDialog.REMIND_DIALOG_NAME, remind_name);
            myIntent.putExtra(RemindDialog.REMIND_DIALOG_DESCRIPTION,
                    remind_description);
            myIntent.putExtra(RemindDialog.REMIND_DIALOG_TIMESTAMP,
                    remind_timestamp);

            pendingIntent = PendingIntent.getService(ReminderService.this,
                    _id, myIntent, PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_ONE_SHOT);

            AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

            alarmManager.set(AlarmManager.RTC_WAKEUP, remind_timestamp,
                    pendingIntent);
            Log.i("Successfully setted alarm for ID:TIMESTAMP = " + _id
                    + ":" + remind_timestamp);


        }

        Log.d("Closing cursor");
        c.close();

        Log.d("Nothing else to do, Stoping the services by himself");
        stopSelf();

    }

第二次启动应用程序后，“adb shell dumpsys alarm”的输出如下所示：

RTC_WAKEUP＃26：报警{42096e70 0型com。}      当= = 93d9h0m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {4283e8b8：PendingIntentRecord {426ab530 com.startService}}

RTC_WAKEUP＃25：闹钟{41dff7f8 type 0 com。}      当= = 93d9h0m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {41f1e730：PendingIntentRecord {41e7e1b0 com.startService}}

RTC_WAKEUP＃24：报警{42161b60 0型com。}      当= + 76d19h50m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {428494d8：PendingIntentRecord {42705b90 com.startService}}

RTC_WAKEUP＃23：报警{41ef50a8 0型com。}      当= + 76d19h50m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {41f1de18：PendingIntentRecord {41efdcd0 com.startService}}

RTC_WAKEUP＃22：报警{42549b40 0型com。}      type = 0 when = + 51d5h30m54s107ms repeatInterval = 0 count = 0      operation = PendingIntent {428697e8：PendingIntentRecord {427c9890 com.startService}}

RTC_WAKEUP＃21：闹钟{41f2fe20 type 0 com。}      type = 0 when = + 51d5h30m54s107ms repeatInterval = 0 count = 0      operation = PendingIntent {41fb31a0：PendingIntentRecord {41f3d018 com.startService}}

RTC_WAKEUP＃20：报警{4269f008 0型com。}      当= + 21d10h30m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {428706f0：PendingIntentRecord {427fd1f0 com.startService}}

RTC_WAKEUP＃19：报警{41fb1428输入0 com。}      当= + 21d10h30m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {41f3c958：PendingIntentRecord {4212d098 com.startService}}

RTC_WAKEUP＃18：报警{426aa948 0型com。}      当= + 16d14h16m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {42875fb8：PendingIntentRecord {4282bf98 com.startService}}

RTC_WAKEUP＃17：报警{42554a70 0型com。}      当= + 16d14h16m54s107ms repeatInterval = 0 count = 0时，type = 0      operation = PendingIntent {41ec39e8：PendingIntentRecord {426a0620 com.startService}}

所以，主要的问题是为什么我的PendingIntents重复，因为在第一次看，第一次和第二次启动应该完全相同（输入Cursor绝对相同）。

谢谢！抱歉我的英文。

Answer 1

~~您可能已经替换了PendingIntent，因此您没有重复项。但是，您尚未取消之前使用AlarmManager安排的闹钟。为此，您需要致电：~~

alarmManager.cancel(pendingIntent);

之前：

alarmManager.set(AlarmManager.RTC_WAKEUP, remind_timestamp, pendingIntent);

~~这将取消与传递的PendingIntent匹配的所有警报。~~

编辑：以上回答对OP没有帮助，可能是错误的（参见A - C的评论）

替换PendingIntent.FLAG_UPDATE_CURRENT时，您需要使用PendingIntent.FLAG_CANCEL_CURRENT代替PendingIntent。这应该只导致1个预定的警报。

问题在于，通过在创建新的PendingIntent时取消现有AlarmManager，您PendingIntent无法确定您正在安排的警报正在替换另一个警报（因为它不能比较{{1}}，因为旧的不再存在。）

如何避免重复PendingIntents

1 个答案: