學習記錄:Visual Studio 2019中使用C#進行Android開發-雜項 建立通知 notifation

三天,測試了好多網上的示例,均失敗,最終在StackOverflow找到了能夠成功運作的示例,做了精簡後如下:

重點在于新增的NotificationChannel

        private void btnTestNotifyAgain_Click(object sender, System.EventArgs e)

        {

            NotificationChannel channel = new NotificationChannel(BaseContext.PackageName, "Testing Messages", NotificationImportance.High);

            channel.EnableVibration(true);

            channel.EnableLights(true);

            channel.SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Notification), new AudioAttributes.Builder().SetUsage(AudioUsageKind.Notification).Build());

            channel.LockscreenVisibility = NotificationVisibility.Public;

            NotificationManager notificationManager = NotificationManager.FromContext(BaseContext);

            notificationManager.CreateNotificationChannel(channel);

            Notification.Builder builder = new Notification.Builder(BaseContext, BaseContext.PackageName);

            builder.SetContentTitle("标題");

            builder.SetContentText("StackOverflow例子改寫,忽略判斷版本.");

            builder.SetAutoCancel(true);

            builder.SetSmallIcon(Resource.Drawable.ic_little_notification);

            builder.SetLargeIcon(BitmapFactory.DecodeResource(Resources, Resource.Drawable.monkey_icon));

            //在通知中增加圖像

            Notification.BigPictureStyle picStyle = new Notification.BigPictureStyle();

            picStyle.BigPicture(BitmapFactory.DecodeResource(Resources, Resource.Drawable.x_bldg));

            builder.SetStyle(picStyle);

            Notification notification = builder.Build();

            notificationManager.Notify(1331, notification);

        }