重复闹钟和时间更改

Question

我已经在我的应用程序中设置了一个闹钟，该闹钟直到上周都可以正常工作。我使用的代码是这样的

am.setRepeating(AlarmManager.RTC_WAKEUP, setalarmon.getTimeInMillis(), 7000 * 3600 * 24, pi);

它会在当地时间每周五的 11:00 设置闹钟。问题是我的国家因夏令时移至其他时区。我们在 UTC+1 现在我们在 UTC+2，所以警报现在在 12:00 响起。 无论 DST 变化如何设置警报同时触发有什么想法吗？

Answer 1

我不知道 setalarmon 到底是什么。我猜它是一个日历对象。问题是你是怎么定义的？

Calendar setalarmon = Calendar.getInstance(Locale.getDefault());

应该给你正确的时区。

Answer 2

是的，它是日历对象并使用正确的本地时间。我的问题是 setRepeating 使用的是 UTC 时间。这就是发生的事情。警报于 3 月 25 日星期五 11:00 正确发射。它应该在 4 月 1 日星期五 11:00 再次触发，因此正确设置为在 7*24*60*60*1000 毫秒后重复。问题是由于 DST 而改变了本地时间，在这些毫秒之后，本地时间是 12 而不是 11，所以警报会在 12 点响起。这就是我想要避免的，我正在寻求帮助

Answer 3

试试这个：这是我的示例代码

主活动：

public static int NOW_NOTIFICATION = 101; 

Intent intent = new Intent(MainActivity.this, NotificationReceiver.class);
                intent.putExtra(NotificationReceiver.NOTIFICATION_MESSAGE, "Sample Alert");
                PendingIntent pendingIntent = PendingIntent.getBroadcast(
                        MainActivity.this, NOW_NOTIFICATION, intent, PendingIntent.FLAG_ONE_SHOT);

                cancelNotification(NOW_NOTIFICATION);
                AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
                alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
                        + (2 * 1000), pendingIntent);

取消通知：

public void cancelNotification(int requestCode) {
        try {
            Intent notificationIntent = new Intent(getApplicationContext(), NotificationReceiver.class);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), requestCode, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
            alarmManager.cancel(pendingIntent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

通知接收者：

public class NotificationReceiver extends BroadcastReceiver {
    public static String NOTIFICATION_MESSAGE = "notificationMessage";


    @Override
    public void onReceive(Context context, Intent intent) {
        String message = intent.getStringExtra(NOTIFICATION_MESSAGE);
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        //Define sound URI
        Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        Intent notificationIntent = new Intent(context, EmptyActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
        final DateTime dateTime = DateTime.now();
        int color = 0xffffaa00;
//        int color1 = context.getColor(R.color.notificatinBackgroundColor);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
        builder.setSmallIcon(R.drawable.festi_push_message_small);
        builder.setContentIntent(pendingIntent);
        builder.setContentTitle("Notification Sample");
        builder.setAutoCancel(true);
        builder.setContentText(message + ", Current Time : " + dateTime.getHourOfDay() + ":" + dateTime.getMinuteOfHour() + ":" + dateTime.getSecondOfMinute());
        builder.setSound(soundUri);
        builder.setLights(Color.RED, 1000, 1000);
        builder.setColor(color);


        Notification notification = builder.build();

        notification.flags |= Notification.FLAG_AUTO_CANCEL;

        notificationManager.notify(102938, notification);
    }

}

TimeZoneChangedReceiver：

public class TimeZoneChangedReceiver extends BroadcastReceiver {
    public static String NOTIFICATION_MESSAGE = "notificationMessage";

    public static int NOW_NOTIFICATION = 101;

    Context context;

    @Override
    public void onReceive(Context context, Intent intent) {
        this.context = context;
        Intent intentNitification = new Intent(context, NotificationReceiver.class);
        intentNitification.putExtra(NotificationReceiver.NOTIFICATION_MESSAGE, "Sample Alert");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(
                context, NOW_NOTIFICATION, intentNitification, PendingIntent.FLAG_ONE_SHOT);

        cancelNotification(NOW_NOTIFICATION);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
                + (2 * 1000), pendingIntent);
    }

    public void cancelNotification(int requestCode) {
        try {
            Intent notificationIntent = new Intent(context, NotificationReceiver.class);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(context, requestCode, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
            alarmManager.cancel(pendingIntent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

AndroidManifest：

<receiver android:name=".NotificationReceiver" />

        <receiver android:name=".TimeZoneChangedReceiver">
            <intent-filter>
                <action android:name="android.intent.action.TIMEZONE_CHANGED" />
            </intent-filter>
        </receiver>