Android Question Bitmap editing to create a image that appears circle

Sub Activity_Create(FirstTime As Boolean)
   Dim cvs As Canvas = CreateBitmap
   DrawRoundBitmap(cvs, LoadBitmap(File.DirAssets, "1.jpg"))
   Activity.SetBackgroundImage(cvs.Bitmap)
End Sub

Sub CreateBitmap As Canvas
   Dim bmp As Bitmap
   bmp.InitializeMutable(200dip, 200dip)
   Dim cvs As Canvas
   cvs.Initialize2(bmp)
   Dim r As Rect
   r.Initialize(0, 0, bmp.Width, bmp.Height)
   cvs.DrawRect(r, Colors.Transparent, True, 0)
   Dim p As Path
   p.Initialize(0, 0)
   Dim jo As JavaObject = p
   Dim x = 100dip, y = 100dip, radius = 100dip As Float
   jo.RunMethod("addCircle", Array As Object(x, y, radius, "CW"))
   cvs.ClipPath(p)
   Return cvs
End Sub

Sub DrawRoundBitmap (cvs As Canvas, bmp As Bitmap)
   Dim r As Rect
   r.Initialize(0, 0, cvs.Bitmap.Width, cvs.Bitmap.Height)
   cvs.DrawBitmap(bmp, Null, r)
End Sub

Sub JobDone (Job As HttpJob)
If Job.Success = True Then
    Dim cvs As Canvas = CreateBitmap
    DrawRoundBitmap(cvs, Job.GetBitmap)
    RV.SetImage("imgNow", cvs.Bitmap)
    RV.UpdateWidget
Else
    Log("Error")
    ToastMessageShow("Error", True)
End If
Job.Release
End Sub