android - 如何查看闹钟是否设置

Question

我正在尝试检查我的闹钟是否处于 Activity 状态。 alarmIsSet 方法在设置闹钟前会返回false，在设置闹钟时返回true。到目前为止一切顺利，但是，在我取消警报后，alarmIsSet 将继续返回 true，直到我重新启动设备。我该如何解决这个问题？

public class Alarm extends Activity {
    private Intent intent = new Intent("PROPOSE_A_TOAST");

    private void alarm (boolean activate) {
        AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent, 0);

        if(activate == true) {
            int type = AlarmManager.ELAPSED_REALTIME_WAKEUP;
            long interval = 3000;
            long triggerTime = SystemClock.elapsedRealtime();       
            am.setRepeating(type, triggerTime, interval, pi);       
        } else {
            am.cancel(pi);
        }
    }

    private boolean alarmIsSet() {
        return PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_NO_CREATE) != null;
    }
}

Answer 1

你只需要添加

pi.cancel();

之后

am.cancel(pi);