XamarinFormsRadioButtonXAML

Radio button and Radio Group for Xamarin.Forms just works like Picker and it is bindable in XAML.

This Sample demonstrated using MVVM design pattern.

it is an extension to (https://github.com/XForms/Xamarin-Forms-Labs)

Radio Group in Android

Radio Group in iOS

Radio Group in Windows Phone

Super easy to use.

Xaml :

Reference the assembly namespace

       xmlns:custom="clr-namespace:XFormsRadioButton.CustomControls;assembly=XFormsRadioButton"

Render your control:

       <custom:BindableRadioGroup x:Name="MyRadiouGroup" 
         ItemsSource="{Binding Path=MyList.Values}" 
         SelectedIndex="{Binding SelectedIndex}" VerticalOptions="Start" />

To subscribe for Radio Button Checked event, follow this code.
Code behind of Xaml:

         MyRadiouGroup.CheckedChanged += MyRadiouGroup_CheckedChanged;	
         
         void MyRadiouGroup_CheckedChanged(object sender, int e)
         {
           var radio = sender as CustomRadioButton;

           if (radio == null || radio.Id == -1) return;
           
           // Display selected value in Label   
            txtSelected.Text = radio.Text;

         }

In The ViewModel, you need to provide the ItemSource as Dictionary of type <int, string>, Ex. Dictionary<int, string>();

        private Dictionary<int, string> myList;
        public Dictionary<int, string> MyList
        {
          get { return myList; }
          set
          {
            myList = value;
            NotifyPropertyChanged("MyList");
          }
         }
         
         private void LoadData()
         {
           for (int i = 0; i < 3; i++)
            {
              MyList.Add(i, "Item " + i); 
            }
          }

If you are stuck, let me know - @kirtisagar