android webview 跨域问题

使用Android webView访问html页面，碰到ajax跨域访问时，仅仅在header中加入

http {
  ......
  add_header Access-Control-Allow-Origin *;
  add_header Access-Control-Allow-Headers X-Requested-With;
  add_header Access-Control-Allow-Methods GET,POST,OPTIONS;
  ......
}

信息，无法解决跨域访问问题，可以尝试给webview设置如下配置，已解决该问题；

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN){
            webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
        }else{
            try {
                Class clazz = webView.getSettings().getClass();
                Method method = clazz.getMethod("setAllowUniversalAccessFromFileURLs", boolean.class);
                if (method != null) {
                    method.invoke(webView.getSettings(), true);
                }
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }