PCL Acr.UserDialogs. Custom styling for android - xamarin.android

Question

I am using Acr.UserDialogs plugin in my Xamarin MvvmCross project.
And everything was fine, but found that on Android 7.0 Alert dialogs has invisible Ok button (on previous versions it's displayed correctly).
I found only the way to redefine style, through AndroidResourceId property, when creating Alert dialog, but in my case this dialogs are created in PCL:
await userDialogs.AlertAsync(new AlertConfig { Message = message });
So it's not suitable for me to hardcode resourceId (they are regenerated, and common PCL embedded resources is a bad idea).
I tryed to implement my own class, derived from UserDialogImpl, or AbstractUserDialog, but there's a problem with resolving Activity in constructor.
I initialize dialogs in a such way:
UserDialogs.Init(() => Mvx.Resolve<IMvxAndroidCurrentTopActivity>().Activity);
userDialogs = Mvx.Resolve<IUserDialogs>();
Saw, there is also an action parameter, passed to AlertAsync, but cannot find a way to handle it in android project.
Is there another way to customize a style for userDialog in android project ?

Answer 1

If you have a dialog theme...
<style name="YourDialogThemeHere" parent="Theme.AppCompat.DayNight.Dialog">
<item name="colorAccent">#color/accent</item>
</style>
...then you can theme all of the dialogs in one go like this in your Droid project:
var dialogStyle = Resource.Style.YourDialogThemeHere;
AlertConfig.DefaultAndroidStyleId = dialogStyle;
PromptConfig.DefaultAndroidStyleId = dialogStyle;
ConfirmConfig.DefaultAndroidStyleId = dialogStyle;
ActionSheetConfig.DefaultAndroidStyleId = dialogStyle;
DatePromptConfig.DefaultAndroidStyleId = dialogStyle;
TimePromptConfig.DefaultAndroidStyleId = dialogStyle;
LoginConfig.DefaultAndroidStyleId = dialogStyle;
If you want to react to the dialog in the Droid project then you can send a message from the PCL project using the MvvmCross Messenger plugin. The platform specific view can subscribe to the message while the PCL project publishes the message.