How to solve the Galaxy numeric keyboard nightmare

Question

I've been struggling with the Samsung Galaxy numeric keyboard decimal separator nightmare.

I have an Entry on which I must only accept numeric values (including decimals), so in my xaml code I wrote <Entry Keyboard="Numeric"/> and it worked just fine on the VS19 android simulator. But when I run the app on my physical device (Samsung Galaxy S10+) the comma key is disabled and the .- key doesn't work (it types nothing).

I made some digging online and found a few solutions, but none worked for me.

SOLUTION 1 Forcing the app culture to pt-BR (because my phone system language is brazilian portuguese) by adding this code to App() (in App.xaml.cs):

private void SetCultureToPTBR()
{
    CultureInfo br = new CultureInfo("pt-BR");
    CultureInfo.DefaultThreadCurrentCulture = br;
}

But there were no changes.

SOLUTION 2 Setting input type on a custom renderer for entries:

[assembly: ExportRenderer(typeof(Entry), typeof(CustomEntryRenderer))]
namespace AppCoperNitro.Droid.CustomRenderers
{
    public class CustomEntryRenderer : EntryRenderer
    {
        public CustomEntryRenderer(Context context) : base(context)
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
        {
            base.OnElementChanged(e);

            if (Control == null || e.NewElement == null)
                return;
            
            this.Control.KeyListener = DigitsKeyListener.GetInstance(true, true);
            this.Control.InputType = Android.Text.InputTypes.ClassNumber | Android.Text.InputTypes.NumberFlagDecimal;
        }
    }
}

This method changed the .- key to a comma key, and it kinda works (it types a .), but the decimal place is ignored (if I type 2.3 the app receives it as 23).

SOLUTION 3 This solution, but the result was the same as solution 2.

I also tried combining these solutions and their variances, but nothing works the way it should. I don't even care if the entry shows a comma or a dot, I just need the decimal number to be received correctly.

Answer 1

We can change the ways. According to your SOLUTION 2, the entry can input the ., so you can do something in the Entry's UnFocused event. Such as: // Use Gabic's code

 private void Entry_Unfocused(object sender, FocusEventArgs e)
    {
        Entry entry = sender as Entry;
        if (entry.Text.Length > 0 && Android.OS.Build.Manufacturer.Equals("Samsung", StringComparison.CurrentCultureIgnoreCase)) 
           { 
              string a = entry.Text.Replace('.', ',');
              entry.Text = a; 
           }
    }

And then add the event into the xaml:

<Entry Keyboard="Numeric" Unfocused="Entry_Unfocused"/>