1. 首先，在app/build.gradle文件中添加以下依赖项：

dependencies {
    implementation 'com.android.support:support-v4:24.1.1'
}

2. 然后，在你的Activity中，使用以下代码创建一个方法来设置通知：

private void scheduleNotification(Notification notification, int delay) {

    Intent notificationIntent = new Intent(this, NotificationPublisher.class);
    notificationIntent.putExtra(NotificationPublisher.NOTIFICATION_ID, 1);
    notificationIntent.putExtra(NotificationPublisher.NOTIFICATION, notification);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

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

该方法将创建一个通知发布者，用于设置通知并在指定的延迟时间后将其发布。

3. 下一步是创建一个Broadcast Receiver类，用于在通知发布时触发：

public class NotificationPublisher extends BroadcastReceiver {

    public static String NOTIFICATION_ID = "notification-id";
    public static String NOTIFICATION = "notification";

    public void onReceive(Context context, Intent intent) {

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

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

这个类将通知发布到通知栏中。

4. 最后，在Activity中调用scheduleNotification方法来设置通知。参考以下代码：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
    .setSmallIcon(R.drawable.notification_icon)
    .setContentTitle("My notification")
    .setContentText("Hello World!");

Intent intent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);

Notification notification = builder.build();

scheduleNotification(notification, 5000);

这里，我们使用NotificationCompat.Builder类创建一个通知，设置通知的图标、标题和内容。然后，我们为通知设置了一个点击后的意图，将其发送给MainActivity。最后，我们使用scheduleNotification方法设置通知在5秒后发布。

这样，你就可以在你的Android Studio项目中安排通知了。