Dim btChercheAPK As Button
Dim fondandroid As Bitmap
btChercheAPK.Initialize("btChercheAPK")
activity.AddView(btChercheAPK,85%x,45dip,35dip,35dip)
fondandroid.Initialize(File.DirAssets, "android_.png")
btChercheAPK.SetBackgroundImage(fondandroid)
I used a canvas object to draw on a button. That works fine too.