Not able to use decimals with Numeric Keyboard (Xamarin Forms on Android)

user_9669142 0
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I've tried several solutions given on several forums and also asked on the Xamarin Forum, but all without a result: I want to create an Entry in Xamarin Forms where the user can add a decimal number. Problem is that my numeric keyboard disables the comma.

I was able to add a dot using a custom renderer, but since I live in The Netherlands I also need to have the option of using a comma. I test on a Samsung Galaxy S10 and it doesn't work there for no visible reason.

I created a demo for you take a look at, but since I cannot upload any files here you can find it on the thread I created on the Xamarin Forum (demo file). Maybe someone here can figure out what I need to do..

Thanks in advance.

xamarin.forms
2 Answers

To use the comma key in Xamarin.Forms for Android, try the following code.

public class EntryNumericKeyboardRenderer : EntryRenderer
{
    public EntryNumericKeyboardRenderer(Context context) : base(context)
    {
    }
    protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
    {
        base.OnElementChanged(e);

        if (Control != null)
        {
            this.Control.KeyListener = DigitsKeyListener.GetInstance("1234567890,.");
        }
    }
}
user_110832770

Try any other manufactorer and Jarvan Zhangs answer will work. But the Samsung numeric keyboard always shows a dot, there's no way to change that. There are hundreds of people on the internet that want the same, not only for Xamarin but also for native android (e.g. Samsung Galaxy Note II - Comma as Numeric Keyboard Decimal Separator). I ended up replacing every dot with a comma in the TextChanged event (in Xamarin.Forms code)...

Text = Text.Replace(".", ",")

If the Samsung numeric keyboard shows a minus above the dot, that's because it is signed. You can get rid of that with a custom renderer:

if (Android.OS.Build.Manufacturer.Equals("Samsung", StringComparison.CurrentCultureIgnoreCase))
        {
            Control.InputType = InputTypes.ClassNumber | InputTypes.NumberFlagDecimal;
        }
        else
        {
            Control.KeyListener = DigitsKeyListener.GetInstance("1234567890,");
        }

The only other option is to install another keyboard, see linked SO question above...

Edit: while trying to find good examples of other failed attempts (lol) I found this acceppted answer: https://forums.xamarin.com/discussion/175286/samsung-numeric-keyboard-makes-me-cry I don't have a Samsung device in my homeoffice, so can't test, but maybe give it a shot.

user_64439970
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