Question

我试图添加一些＆＃34;提醒＆＃34;我的应用程序的功能。我想设置AlarmManager并在闹钟发生时触发Notification。

我添加了一些方法来创建闹钟，取消闹钟，并查看闹钟是否处于活动状态。

以下代码位于Settings.class Activity：

private boolean getRemindersEnabled() {
    return (PendingIntent.getBroadcast(this,
            1,
            new Intent(this, Main.class),
            PendingIntent.FLAG_NO_CREATE) != null);
}

private void enableReminders() {
    AlarmManager alarmMgr;
    PendingIntent alarmIntent;

    alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(this, Main.class);
    alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

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

    alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            SIXY_MINUTES,
            alarmIntent);

    mRemindersEnabled = getRemindersEnabled();
    populateReminders();
}

private void disableReminders() {
    AlarmManager service = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(this, Main.class);
    PendingIntent pending = PendingIntent.getBroadcast(this,
            0,
            intent,
            PendingIntent.FLAG_CANCEL_CURRENT);
    service.cancel(pending);

    mRemindersEnabled = getRemindersEnabled();
    populateReminders();
}

当我拨打enableReminders()时，它会发出警报。但是，getRemindersEnabled()返回false。我有什么不能做的吗？

Answer 1

getRemindersEnabled()应使用与创建警报的requestCode相同的PendingIntent。在这种情况下，您使用的是1，正确的将是0。

private boolean getRemindersEnabled() {
    return (PendingIntent.getBroadcast(this,
            0,
            new Intent(this, Main.class),
            PendingIntent.FLAG_NO_CREATE) != null);
}

<强> [编辑]

要在致电service.cancel(intent);之前取消闹钟，请使用旗帜pending.cancel();

致电FLAG_UPDATE_CURRENT

PendingIntent pending = PendingIntent.getBroadcast(this,
        0,
        intent,
        PendingIntent. FLAG_UPDATE_CURRENT);
pending.cancel();
service.cancel(pending);

AlarmManager没有创建警报

1 个答案: