Question

我有这个代码用于通过警报管理器设置多个通知：

接收机

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);
        notificationManager.notify(intent.getIntExtra(NOTIFICATION_ID, 0), notification);

    }
}

主要

 private void scheduleNotification(Notification notification, int delay) {


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

        long futureInMillis = System.currentTimeMillis() + delay;
        AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, futureInMillis, pendingIntent);
    }

    private Notification getNotification(String content) {

        Notification.Builder builder = new Notification.Builder(this);
        builder.setContentTitle("Scheduled Notification");
        builder.setContentText(content);
        builder.setSmallIcon(R.drawable.ic_notification_appicon);
        builder.setDefaults(Notification.DEFAULT_SOUND);
        builder.setDefaults(Notification.DEFAULT_VIBRATE);
        builder.setAutoCancel(true);
        builder.setLights(Color.BLUE, 500, 500);
        return builder.getNotification();
    }

在创建我把这段代码：

scheduleNotification(getNotification("3 second delay"), 3000);
scheduleNotification(getNotification("5 second delay"), 5000);

两个通知都会显示，但两者同时显示（5秒后）我的错误在哪里？

Answer 1

好的，我找到了解决方案！

我改变了：

PendingIntent pendingIntent = PendingIntent.getBroadcast(this, (int)System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT)

到

PendingIntent pendingIntent = PendingIntent.getBroadcast(this, (int)System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_ONE_SHOT);

Answer 2

你必须改变这一行

notificationManager.notify(Unique_Integer_Number, notification);

替换为

public class Test {
    // A normal (non-static) initializer does not have the problem
    static {
        try {
            System.out.println("initializer start");

            // --- Works
            System.out.println("\nanonymous inner-class: Print.print");
            EventQueue.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    Print.print();
                }
            });

            // --- Works
            System.out.println("\nmethod ref: Print.print");
            EventQueue.invokeAndWait(Print::print);

            // --- Hangs forever
            System.out.println("\nlambda: Print.print");
            EventQueue.invokeAndWait(() -> Print.print());

            System.out.println("\ninitializer end");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        new Test();
    }
}

唯一整数表示您必须设置永不重复的整数值。例子0,1,2,3,4,5，.... !!!!

与警报管理器的android多个通知

2 个答案: