android WebView 网页转图片

//记得在Activity中createView前加这句代码
    /*
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            WebView.enableSlowWholeDocumentDraw();
        }
    */
 public static Bitmap capture(WebView webView) {
        Picture picture = webView.capturePicture();
        int width = picture.getWidth();
        int height = picture.getHeight();
        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        picture.draw(canvas);
        return bitmap;
    }