Android, layout background tile

Layout layout = ...

Bitmap bmp = BitmapFactory.decodeResource(getResources(),
      R.drawable.paper0);
BitmapDrawable bitmapDrawable = new BitmapDrawable(getResources(),bmp);
bitmapDrawable.setTileModeXY(Shader.TileMode.REPEAT,
      Shader.TileMode.REPEAT);
layout.setBackgroundDrawable(bitmapDrawable);