Android 可扩展通知

我将通过以下链接创建通知：

这是我的代码：

Notification.BigTextStyle textStyle = new Notification.BigTextStyle();

            // Fill it with text:
            string longTextMessage = "I went up one pair of stairs.";
            longTextMessage += " / Just like me. ";
            //...
            textStyle.BigText(longTextMessage);

            // Set the summary text:
            textStyle.SetSummaryText("The summary text goes here.");

            // Plug this style into the builder:


            //creo la notifica:
            var builder = new NotificationCompat.Builder(instance, "enter")
                          .SetSmallIcon(global::Android.Resource.Drawable.IcDialogInfo)
                          .SetContentIntent( pending)
                          .SetDefaults((int)NotificationDefaults.Sound)
                          .SetDefaults((int)NotificationDefaults.Vibrate)
                          .SetNumber(count)
                          .SetAutoCancel(true)
                          .SetContentTitle("Proximity") // Set the title
                          .SetContentText($"benvenuto nel beacon di colore {deskOwner},{count}")
                          .SetStyle(textStyle)
                          .Build();
                           count++;
                // Get the notification manager:
                NotificationManager notificationManager = instance.GetSystemService(Context.NotificationService) as NotificationManager;
                // Pubblico la notifica:
                const int notificationId = 0;
                notificationManager.Notify(notificationId, builder);

            return null;
        }

但是in.SetStyle（textStyle）给了我以下错误： '无法从'Android.App.Notification.BigTextStyle'转换为'Android.Support.V4.App.NotificationCompat.Style'

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我怎样才能修好它

它不起作用的原因是您正在使用NotificationCompat，但没有使用NotificationCompat.BigTextStyle，请尝试以下方法：

        NotificationCompat.BigTextStyle textStyle = new NotificationCompat.BigTextStyle();

        // Fill it with text:
        string longTextMessage = "I went up one pair of stairs.";
        longTextMessage += " / Just like me. ";
        //...
        textStyle.BigText(longTextMessage);

        // Set the summary text:
        textStyle.SetSummaryText("The summary text goes here.");

---

它不起作用的原因是您使用的是NotificationCompat，而不是NotificationCompat.BigTextStyle，请尝试以下操作：

        NotificationCompat.BigTextStyle textStyle = new NotificationCompat.BigTextStyle();

        // Fill it with text:
        string longTextMessage = "I went up one pair of stairs.";
        longTextMessage += " / Just like me. ";
        //...
        textStyle.BigText(longTextMessage);

        // Set the summary text:
        textStyle.SetSummaryText("The summary text goes here.");