ShowVirtualKeyboard如何在Delphi FireMonkey Android平台上运行？

考虑：

Uses FMX.VirtualKeyboard, FMX.Platform;

procedure TForm1.Button1Click(Sender: TObject);
    var Keyboard: IFMXVirtualKeyboardService;
    begin
        keyboard := TPlatformServices.Current.GetPlatformService(IFMXVirtualKeyboardService) as IFMXVirtualKeyboardService;
        if  TVirtualKeyboardState.Visible in keyboard.VirtualKeyBoardState then
        begin
            Keyboard.HideVirtualKeyboard;
        end;
    end;

HideVirtualKeyboard使用此代码运行，但ShowVirtualKeyboard如何在Android平台上运行

因为对于相同的代码，ShowVirtualKeyboard给出：

代码页中没有足够的实际参数错误

该方法希望收到一个参数，指示键盘将键入哪个控件。例如，要显示用于在备忘录控件中键入内容的键盘，请执行以下操作：

procedure TForm1.Button1Click(Sender: TObject);
begin
  keyboard := TPlatformServices.Current.GetPlatformService(IFMXVirtualKeyboardService) as IFMXVirtualKeyboardService;
  keyboard.showVirtualKeyboard(memo1);
end;