When I call drawBitmap with the (Bitmap bitmap, Rect src, Rect dst, Paint paint) implementation, I only get the top left quarter of the image displayed - my source image is 16x16 but only 8x8 is displayed.
rSource = new Rect();
rDest = new Rect();
rSource.set(0,0,16,16);
rDest.set(0,0,16,16);
canvas.drawBitmap(tiles, rSource, rDest, null);