Android 重复闹钟不起作用

Question

这很好用:

Intent intent = new Intent(HelloAndroid2.this, AlarmReceiver.class);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(HelloAndroid2.this, 0,
    intent, PendingIntent.FLAG_ONE_SHOT);

    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (12 * 1000), pendingIntent);

这行不通。我只听到一次闹钟。

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (12 * 1000), 3 * 1000, pendingIntent);

我也试过这个，不走运:

Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.add(Calendar.SECOND, 5);

    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 7000, pendingIntent);

问题是什么？

Answer 1

来自PendingIntent doc对于 FLAG_ONE_SHOT:

this PendingIntent can only be used once. If set, after send() is called on it, it will be automatically canceled for you and any future attempt to send through it will fail.

因此在 pendingIntent 第一次被触发后，它将被取消并且下一次尝试通过警报管理器发送它将会失败

尝试使用 FLAG_UPDATE_CURRENT