Android Code Example: Paint (via http://goo.gl/vWu0F3)

Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(WHITE);

Bitmap clipped = Bitmap.createBitmap(width, height, ARGB_8888);
Canvas canvas = new Canvas(clipped);
canvas.drawRoundRect(new RectF(0, 0, width, height), radius, radius, paint);
paint.setXfermode(new PorterDuffXfermode(DST_IN));