Delphi D10.3 FMX android 调用自带浏览器打开网页

百度网上代码，发现少一个引用：Androidapi.Helpers，StringToJString会报错，编译不通过！

uses
  Androidapi.Helpers,
  FMX.Helpers.Android, Androidapi.JNI.GraphicsContentViewText,
  Androidapi.JNI.Net, Androidapi.JNI.JavaTypes,
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  FMX.Controls.Presentation, FMX.StdCtrls;

procedure TMainform.FormCreate(Sender: TObject);
begin
    XOpenURL('http://192.168.1.199:8004/mes2.html');
end;

procedure TMainform.XOpenURL(AUrl: String);
var
  Intent: JIntent;
begin
  Intent := TJIntent.JavaClass.init(TJIntent.JavaClass.ACTION_VIEW, TJnet_Uri.JavaClass.parse(StringToJString(AUrl)));
  SharedActivity.startActivity(Intent);
end;