Inject Dependencies

id1.dart

import 'package:flutter/material.dart';
import 'package:get/get.dart'; //STEP 1 - import Get

void main() {
  //STEP 3 - add our services - immediate or lazy
  Get.put(TestService());
  Get.lazyPut<AuthService>(() => AuthService());
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    //STEP 2 - replace MaterialApp with GetMaterialApp
    return GetMaterialApp(
      title: 'Flutter Demo',
      enableLog: false,
      theme: ThemeData(
          primaryColor: Colors.purple,
          buttonColor: Colors.green,
          textTheme: TextTheme(
              bodyText2: TextStyle(color: Colors.indigo, fontSize: 20))),
      home: Testpage(),
    );
  }
}

class Testpage extends StatefulWidget {
  Testpage({Key key}) : super(key: key);

  @override
  _TestpageState createState() => _TestpageState();
}

class _TestpageState extends State<Testpage> {
  //BONUS 2 - clearer code
  var height = Get.height;
  var orientation = Get.mediaQuery.orientation;
  var isDarkMode = Get.isDarkMode;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Inject Dependencies'),
        centerTitle: true,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('Welcome', style: Get.textTheme.headline5),
            Text('height: ${height.truncate()}'),
            Text('orientation: $orientation'),
            Text('dark mode: $isDarkMode'),
            SizedBox(height: 24),
            RaisedButton(
              onPressed: () {
                // STEP 4 - call the TestService service
                TestService.to.testStuff();
              },
              child: Text(
                'Call Service',
                style: TextStyle(color: Colors.white),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class TestService {
  static TestService get to => Get.find();
  testStuff() {
    //STEP 4 - call the AuthService
    String result = Get.find<AuthService>().authStuff();
    //BONUS 1 - snackbar without context or builder
    Get.snackbar('TestService', result,
        overlayBlur: 4, backgroundColor: Colors.orange);
  }
}

class AuthService {
  authStuff() {
    //BONUS 1 - interrogate page status without context
    print(Get.textTheme.headline5.color);
    print(Get.height);
    print(Get.mediaQuery.orientation);
    print(Get.isDarkMode);

    return 'You are Authorized';
  }
}