替换过时的 Notification.Builder.SetPriority()？

Question

我正在尝试在 Android 上设置通知，并收到 Visual Studio 发出的警告，指出 Notification.Builder.SetPriority() 已过时。

有替代品吗？ Android 建议 SetImportance，但这似乎不包含在 Xamarin 中。

Answer 1

此方法在 API 级别 26 中已弃用。 请改用 setImportance(int)。

SetImportance 包含在 API26 中的 NotificationChannel 中，可以设置为通道上的属性，或在 NotificationChannel 构造函数中：

channel.Importance = NotificationImportance.High

或

channel = new NotificationChannel(myUrgentChannel, channelName, NotificationImportance.High);

条件 API 通知示例：

var title = "Note from Sushi";
var message = "StackOverflow is a really great source of information";
using (var notificationManager = NotificationManager.FromContext(BaseContext))
{
    Notification notification;
    if (Android.OS.Build.VERSION.SdkInt < Android.OS.BuildVersionCodes.O)
    {
        notification = new Notification.Builder(BaseContext)
                                             .SetContentTitle(title)
                                             .SetContentText(message)
                                             .SetAutoCancel(true)
                                             .SetPriority(1)
                                             .SetSmallIcon(Resource.Drawable.icon)
                                             .SetDefaults(NotificationDefaults.All)
                                             .Build();
    }
    else
    {
        var myUrgentChannel = PackageName;
        const string channelName = "SushiHangover Urgent";

        NotificationChannel channel;
        channel = notificationManager.GetNotificationChannel(myUrgentChannel);
        if (channel == null)
        {
            channel = new NotificationChannel(myUrgentChannel, channelName, NotificationImportance.High);
            channel.EnableVibration(true);
            channel.EnableLights(true);
            channel.LockscreenVisibility = NotificationVisibility.Public;
            notificationManager.CreateNotificationChannel(channel);
        }
        channel?.Dispose();

        notification = new Notification.Builder(BaseContext)
                                             .SetChannelId(myUrgentChannel)
                                             .SetContentTitle(title)
                                             .SetContentText(message)
                                             .SetAutoCancel(true)
                                             .SetSmallIcon(Resource.Drawable.icon)
                                             .Build();
    }
    notificationManager.Notify(1331, notification);
    notification.Dispose();
}