MainActivity.java 文件源码

private Icon getIcon(String subreddit, @DrawableRes int overlay) {
    Bitmap color = Bitmap.createBitmap(toDp(this, 148), toDp(this, 148), Bitmap.Config.RGB_565);
    color.eraseColor(Palette.getColor(subreddit));
    color = clipToCircle(color);

    Bitmap over = drawableToBitmap(ResourcesCompat.getDrawable(getResources(), overlay, null));

    Canvas canvas = new Canvas(color);
    canvas.drawBitmap(over, color.getWidth() / 2 - (over.getWidth() / 2),
            color.getHeight() / 2 - (over.getHeight() / 2), null);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        return Icon.createWithBitmap(color);
    }
    return null;
}