RoundedCornersTransformation.java 文件源码

@Override
public Resource<Bitmap> transform(Context context, Resource<Bitmap> resource, int outWidth, int outHeight) {
    Bitmap source = resource.get();

    int width = source.getWidth();
    int height = source.getHeight();

    Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(bitmap);
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
    drawRoundRect(canvas, paint, width, height);
    return BitmapResource.obtain(bitmap, mBitmapPool);
}