RoundedBitmapDisplayer.java 文件源码

private static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int roundPixels, Rect srcRect, Rect destRect, int width,
                                             int height) {
    Bitmap output = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final Paint paint = new Paint();
    final RectF destRectF = new RectF(destRect);

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(0xFF000000);
    canvas.drawRoundRect(destRectF, roundPixels, roundPixels, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, srcRect, destRectF, paint);

    return output;
}