问android显示通知，在任何应用程序上都有弹出窗口

EN

private void sendNotification(int distance, ViewObject viewObject) {
    Intent notificationIntent = new Intent(getApplicationContext(), MainActivity.class);
    notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    notificationIntent.putExtra("path", viewObject.getPath());
    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    stackBuilder.addParentStack(MainActivity.class);
    stackBuilder.addNextIntent(notificationIntent);
    PendingIntent notificationPendingIntent = stackBuilder.getPendingIntent(Integer.parseInt(viewObject.getRefId()), PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.BigTextStyle bigText = new NotificationCompat.BigTextStyle();
    bigText.bigText(String.format(getString(R.string.notification), viewObject.getTitle()));
    bigText.setBigContentTitle(getString(R.string.hello));

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
    builder.setSmallIcon(R.drawable.ic_wald_poi)
            .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_poi))
            .setColor(getResources().getColor(R.color.primary))
            .setContentTitle(getString(R.string.hello))
            .setContentIntent(notificationPendingIntent)
            .setContentText(String.format(getString(R.string.notification), viewObject.getTitle()))
            .setDefaults(Notification.DEFAULT_ALL)
            .setStyle(bigText);

    builder.setAutoCancel(true);
    NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    mNotificationManager.notify(0, builder.build());
}