引入

pubspec.yaml

dependencies:
  get:

主页面

void main() {
  runApp(GetMaterialApp(
    initialRoute: '/home',/// 初始化路由
    getPages: [
      GetPage(name: '/home', page: () => HomePage()),
      GetPage(name: '/other', page: () => OtherPage()),
    ],
  ));
}

class HomePage extends StatelessWidget {
  const HomePage({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    /// 注入依赖
    final RomeoController rmvc = Get.put(RomeoController());
    return Container(
        child: Scaffold(
            appBar: AppBar(
              title: Text('GetX-Demo-Home'),
              centerTitle: true,
            ),
            body: Center(
                child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Obx(() => Text('${rmvc.count}')),/// 使用Obx包裹组件，当该组件使用的count发生改变时，会自动刷新该组件
                ElevatedButton(
                    onPressed: () {
                      rmvc.pressed();
                    },
                    child: Icon(Icons.add)),
                ElevatedButton(
                    onPressed: () {
                      Get.toNamed('/other',
                          arguments: {'name': 'turbo', 'age': 20});/// 使用路由跳转，arguments:Map 跳转时可以携带参数
                    },
                    child: Icon(Icons.navigation))
              ],
            ))));
  }
}

controller 继承自GetxController

/// 集成自GetxController
class RomeoController extends GetxController {
  var count = 0.obs;/// .obs 
  pressed() => count++;
}

otherPage

class OtherPage extends StatelessWidget {
  final RomeoController vc = Get.find();/// Get.find() 你可以让Get找到一个正在被其他页面使用的Controller，并将它返回给你。
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('otherPage'),
        leading: GestureDetector(
          child: Icon(Icons.ac_unit),
          onTap: () {
            Get.back(result: 'sssss');
          },
        ),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(
                '${vc.count}' +
                    Get.arguments['name'] +
                    ' ' +
                    Get.arguments['age'].toString(),
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 50,
                  color: Colors.orange,
                )),
            ElevatedButton(
              onPressed: () {},
              child: Icon(Icons.archive),
            ),
          ],
        ),
      ),
    );
  }
}