xamarin如何向特定用户发送本地通知或显示/隐藏？

Question

我在我的应用中使用android本地通知，一切正常， 但我的问题是：

有没有办法向特定用户或群组发送通知，或者向/从特定用户显示/隐藏通知？

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
  .SetAutoCancel(true)                    // Dismiss the notification from the notification area when the user clicks on it
  .SetContentIntent(resultPendingIntent)  // Start up this activity when the user clicks the intent.
  .SetContentTitle("Button Clicked")      // Set the title
  .SetNumber(count)                       // Display the count in the Content Info
  .SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Alarm))
  .SetDefaults(0)
  .SetSmallIcon(Resource.Drawable.notify)
  .SetVibrate(new long[] { 1000, 1000 })
  .SetContentText(String.Format("The button has been clicked {0} times.", count)); // the message to display.

// Finally, publish the notification:
NotificationManager notificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
            notificationManager.Notify(ButtonClickNotificationId, builder.Build());

Answer 1

  

有没有办法向特定用户或群组发送通知，或者向/从特定用户显示/隐藏通知？

您需要使用UserManager来查询用户，但要使用该权限，您的应用需要MANAGE_USERS权限，其权限级别为signature|system，这意味着应用程序必须用平台密钥签名。您可以参考this case。