如何在 Android 中安排通知 [英] How to Schedule Notification in Android

问题描述

我正在尝试为将来的某个时间设置通知.我有创建通知的代码，但我找不到安排它的选项.

I'm trying to set notification for a time in the future. I have the code for creating a notification but I can't find an option to schedule it.

如何安排通知?

推荐答案

为此你需要使用 PendingIntent 和 BroadCastReceiver -

You need to use PendingIntent and BroadCastReceiver for this -

public void scheduleNotification(Context context, long delay, int notificationId) {//delay is after how much time(in millis) from current time you want to schedule the notification
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
                .setContentTitle(context.getString(R.string.title))
                .setContentText(context.getString(R.string.content))
                .setAutoCancel(true)
                .setSmallIcon(R.drawable.app_icon)
                .setLargeIcon(((BitmapDrawable) context.getResources().getDrawable(R.drawable.app_icon)).getBitmap())
                .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));

        Intent intent = new Intent(context, YourActivity.class);
        PendingIntent activity = PendingIntent.getActivity(context, notificationId, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        builder.setContentIntent(activity);

        Notification notification = builder.build();

        Intent notificationIntent = new Intent(context, MyNotificationPublisher.class);
        notificationIntent.putExtra(MyNotificationPublisher.NOTIFICATION_ID, notificationId);
        notificationIntent.putExtra(MyNotificationPublisher.NOTIFICATION, notification);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, notificationId, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        long futureInMillis = SystemClock.elapsedRealtime() + delay;
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, futureInMillis, pendingIntent);
    }

此外，您需要在接收器类中显示通知 -

Also, you need to show notification in your receiver class -

public class MyNotificationPublisher extends BroadcastReceiver {

    public static String NOTIFICATION_ID = "notification_id";
    public static String NOTIFICATION = "notification";

    @Override
    public void onReceive(final Context context, Intent intent) {

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

        Notification notification = intent.getParcelableExtra(NOTIFICATION);
        int notificationId = intent.getIntExtra(NOTIFICATION_ID, 0);
        notificationManager.notify(notificationId, notification);
    }
}

最后，使用适当的参数调用 scheduleNotification() 就可以了！

Finally, call scheduleNotification() with appropriate arguments and you are good to go!

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