go-music-player/gmus-mobile/lib/main.dart

import 'package:flutter/material.dart';
import 'package:get/get.dart';

void main() => runApp(GetMaterialApp(home: Gmus()));

class Controller extends GetxController {
  var name = ''.obs;
  setName(String newName) {
    name.value = newName;
  }
}

class Gmus extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final Controller controller = Get.put(Controller());

    return Scaffold(
      appBar: AppBar(
          title: Text('gmus'),
        ),
      body: Container(
          child: Column(
              children: [
                Obx(() => Text("Name: ${controller.name}")),
                TextField(
                    onChanged: controller.setName,
                    decoration: InputDecoration(
                        border: InputBorder.none,
                        hintText: 'Set name',
                      ),
                ),
              ],
          ),
        ),
      );
  }
}