quan/lib/main.dart

import 'dart:convert';

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';


void main() {
  runApp(const MyApp());
}

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: '点击送券',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: '点击送券'),
      builder: EasyLoading.init(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  var _phone = TextEditingController();
  Future<void> _incrementCounter() async {
    EasyLoading.show(status: "处理中...");
    var map = {"phone":_phone.text};
    var resp = await Dio().get("https://pos.platform.lotus-wallet.com/app/auth/platform/sendCoupon?Environment=app",queryParameters: map);
    EasyLoading.dismiss();
    print(resp.data);
    var decoder = const JsonDecoder();
    var m1 = Map<String,dynamic>.from(resp.data);
    if (m1["code"] == 0){
      EasyLoading.showSuccess(m1['data']);
    }else{
      EasyLoading.showSuccess(m1['msg']);
    }

    setState(() {
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
             SizedBox(
              width: 200,
              child: TextField(
                maxLength: 11,
                decoration: const InputDecoration(labelText: "手机号码"),
                controller: _phone,
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.star),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}