Question

我正在尝试停止警报并检查警报是否停止，但它始终返回true表示警报正在运行。我试图根据链接https://stackoverflow.com/a/17616299/1226882中的答案停止闹钟，但它对我不起作用。

请参阅以下代码

启动闹钟

public static void startSchedulerAlaram(Context ctx) {

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 0); 
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

if (calendar.compareTo(Calendar.getInstance()) <= 0)
    calendar.add(Calendar.DATE, 1);

AlarmManager alarmManager = (AlarmManager) ctx
        .getSystemService(Context.ALARM_SERVICE);

Intent intent = new Intent(ctx, Alaram_Receiver.class);
intent.setAction(Utility.SCHEDULE_ACTION);

PendingIntent pi = PendingIntent.getBroadcast(ctx, 1, intent,0);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, pi);

log("Scheduler Alarm", "Started");

}

停止闹钟

public static void stopSchedulerAlaram(Context ctx) {

Intent intent = new Intent(ctx, Alaram_Receiver.class);
intent.setAction(Utility.SCHEDULE_ACTION);
PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 1,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) ctx
        .getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);

log("Scheduler Alarm", "Stopped");
}

检查闹钟

public static boolean checkSchedulerAlaram(Context ctx) {

boolean alarmUp = (PendingIntent.getBroadcast(ctx, 1, new Intent(ctx,Alaram_Receiver.class).setAction(Utility.SCHEDULE_ACTION),
        PendingIntent.FLAG_NO_CREATE) != null);

return alarmUp;
}

Answer 1

您必须通过different id for set alarm

PendingIntent.getBroadcast(ctx, id, intent,PendingIntent.FLAG_UPDATE_CURRENT);

cancel alarm you have pass same id that you used for set。

PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, id,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) ctx
        .getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);

Answer 2

您正在使用此代码确定警报是否已设置：

boolean alarmUp = (PendingIntent.getBroadcast(ctx, 1, new Intent(ctx,Alaram_Receiver.class).setAction(Utility.SCHEDULE_ACTION),
    PendingIntent.FLAG_NO_CREATE) != null);

此代码依赖PendingIntent的存在来确定警报是否已安排。

取消闹钟时，请执行以下操作：

PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 1,
    intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) ctx
    .getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);

这会取消闹钟，但不会从系统中删除PendingIntent。由于您依赖于PendingIntent的存在/不存在来知道警报是否已经安排，您还需要取消PendingIntent以便将其从系统中删除。这样做（取消警报后）：

pendingIntent.cancel();

Answer 3

这是我用来取消闹钟服务的代码

Intent intent = new Intent(this, MyReceiver.class);
         PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
         AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
         alarmManager.cancel(sender);

警报没有停止

3 个答案: