我使用Support.V7.NotificationCompat
显示通知。我想在单击此通知时导航到ViewModel。当我尝试使用MvxViewModelRequest
显示ViewModel时,我传递给ViewModel的导航参数不起作用,但是当我像这样使用ShowViewModel时它可以工作:
ShowViewModel<RouteModificationViewModel>(new { id = existingModification.Id });
这是ViewModel Init方法。当我使用ShowViewModel
导航时,Guid具有正确的值。当我使用Guid.Empty
导航时,Guid的值始终为MvxViewModelRequest
(全部为0&#39; s。)
public void Init(Guid id)
{
_routeModificationId = id;
}
这就是我尝试从通知中显示ViewModel的方式:
public void ShowRouteModifiedNotification(RouteModificationModel routeModificationModel)
{
var context = Application.Context;
var builder = new NotificationCompat.Builder(context);
builder.SetDefaults(NotificationCompat.DefaultAll);
builder.SetCategory(NotificationCompat.CategoryStatus);
builder.SetAutoCancel(true);
builder.SetPriority(NotificationCompat.PriorityHigh);
builder.SetSmallIcon(Resource.Mipmap.ic_launcher);
builder.SetContentTitle("Route Modification");
builder.SetContentText("Hello, World!");
builder.SetContentIntent(GetIntent(routeModificationModel.Id));
builder.SetVibrate(new long[] { 1000, 1000, 1000, 1000, 1000 });
builder.SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Notification));
var notification = builder.Build();
var notificationManager = (NotificationManager)context.GetSystemService(Context.NotificationService);
var handler = new Handler(Looper.MainLooper);
handler.Post(() =>
{
notificationManager.Notify(RouteModificationNotificationId, notification);
});
}
private PendingIntent GetIntent(Guid guid)
{
var request = MvxViewModelRequest<RouteModificationViewModel>.GetDefaultRequest();
var json = Mvx.Resolve<IMvxJsonConverter>().SerializeObject(new { id = guid });
request.PresentationValues = new Dictionary<string, string>
{
{ "id", json }
};
var translator = Mvx.Resolve<IMvxAndroidViewModelRequestTranslator>();
var intent = translator.GetIntentFor(request);
return PendingIntent.GetActivity(Application.Context, 0, intent, 0);
}
任何人都可以看到我错过或做错了吗?
答案 0 :(得分:1)
MvvmCross此后收到了MvvmCross 5.0及更高版本中导航工作方式的重大更新。如果您使用的是MvvmCross 4.x或3.x,则此问题可能才有意义。在这种情况下,4.x中的MvvmCross导航API未正确序列化Guid。您可以通过将Guid序列化为字符串并将字符串作为导航参数传递,然后将字符串反序列化为ViewModel中的Guid来解决此问题。