ColorizedCardView.java 文件源码

private Bitmap renderDrawable(final Drawable drawable) {
    if (drawable instanceof BitmapDrawable) {
        return ((BitmapDrawable) drawable).getBitmap();
    }

    final Rect bounds = drawable.getBounds();
    final Bitmap bitmap = Bitmap.createBitmap(
            bounds.width(),
            bounds.height(),
            Bitmap.Config.ARGB_8888
    );

    final Canvas canvas = new Canvas(bitmap);
    canvas.translate(-bounds.left, -bounds.top);
    drawable.draw(canvas);

    return bitmap;
}