how to an circle shape button in android studio code example

Example: circle button android

XAML Code

<ImageButton Source="images/button1.png"	//This button is through an image
             Padding="10,10,10,10"
             WidthRequest="45"
             HeightRequest="45"								
             BackgroundColor="#FFFFFF" 		//You can use opacity too for example: #FDFFFFFF
             CornerRadius="108"				//To curve the button							
             x:Name="button1"
             Clicked="button1_Clicked">
</ImageButton>