StateListDrawable

    btnBitmap.Initialize("btnBitmap")
    Activity.AddView(btnBitmap, 40dip, 260dip, 60dip, 60dip)

    ' Define a BitmapDrawable for Enabled state
    Dim bdwEnabled As BitmapDrawable
    bdwEnabled.Initialize(LoadBitmap(File.DirAssets, "btnArrowDown0.png"))
    ' Define a BitmapDrawable for Pressed state
    Dim bdwPressed As BitmapDrawable
    bdwPressed.Initialize(LoadBitmap(File.DirAssets, "btnArrowDown1.png"))
    ' Define a StateListDrawable
    Dim stdBitmap As StateListDrawable
    stdBitmap.Initialize
    Dim states(2) As Int
    states(0) = stdBitmap.state_enabled
    states(1) = -stdBitmap.state_pressed
    stdBitmap.addState2(states, bdwEnabled)
    Dim states(1) As Int
    states(0) = stdBitmap.state_enabled
    stdBitmap.addState2(states, bdwPressed)
    ' Set stdBitmap to button btnBitmap 
    btnBitmap.Background = stdBitmap