A simple modification/POC to test the Foldable support in Xamarin.Android

gistfile1.txt

/* 
    Looking at the Samsung Fold, I wanted to see what it would take to support it from a Xamarin.Android app
    It turns out, not a great deal to test the proof of concept. 
    
    Step 1. Download the emulator APK at https://developer.samsung.com/galaxy/foldable/test and follow the instructions to install it
    Step 2. Update the ConfigurationChanges property in the Activity Attribute - see line 24
    Step 3. Override OnSaveInstanceState and OnRestoreInstanceState to save/restore state
    Step 4. Perform any updates (if needed) in OnConfigurationChanged
    Step 5. Add the MetaData attribute for Allowing Multiple Resumed Activities

*/

using Android.App;
using Android.Widget;
using Android.OS;
using Android.Content.PM;
using Android.Content.Res;

[assembly: MetaData("android.allow_multiple_resumed_activities", Value ="true")]

namespace TestApp
{
    [Activity(Label = "TestApp", 
        ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.SmallestScreenSize | ConfigChanges.ScreenLayout, 
        MainLauncher = true, Icon = "@mipmap/icon")]
    public class MainActivity : Activity
    {
        int count = 1;

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            SetContentView(Resource.Layout.Main);

            Button button = FindViewById<Button>(Resource.Id.myButton);
            button.Click += delegate { button.Text = $"{count++} clicks!"; };
        }

        protected override void OnSaveInstanceState(Bundle outState)
        {
            base.OnSaveInstanceState(outState);

            outState.PutInt("counter", count);
        }

        protected override void OnRestoreInstanceState(Bundle savedInstanceState)
        {
            base.OnRestoreInstanceState(savedInstanceState);

            count = savedInstanceState.GetInt("counter", 0);
        }

        public override void OnConfigurationChanged(Configuration newConfig)
        {
            base.OnConfigurationChanged(newConfig);

            // Update any visuals needed here
        }
    }
}

Awesome, thank you so much for the tip. My app used to crash when opening the fold. Now it opens the same page again.
But I do get one issue, it starts to flicker when unfolded.