dio_get请求

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

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

  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  TextEditingController typeController = TextEditingController();
  String showText = '欢迎来到上海白马高级会所';
  @override
  Widget build(BuildContext context) {
    return Container(
       child: Scaffold(
         appBar: AppBar(title: Text('上海白马会所'),),
         body: Container(
           child: Column(
             children: <Widget>[
               TextField(
                 // 监听文本字段的变化
                 controller: typeController,
                 decoration: InputDecoration(
                   labelText: '帅哥类型',
                   helperText: '请输入你喜欢的类型'
                 ),
                 // 关闭软键盘自动弹起
                 autofocus: false,
               ),
               RaisedButton(
                 onPressed: _choiceAction,
                 child: Text('点鸭'),
               ),
               Text(
                 showText,
                 overflow: TextOverflow.ellipsis,
                 maxLines: 1,
               )
             ],
           ),
         ),
       ) 
    );
  }
  _choiceAction(){
    // 判断文本框是否为空，如果为空就不查询
    if(typeController.text.toString() == ''){
      showDialog(
        context: context,
        // 提示用户为空
        builder: (context) => AlertDialog(title: Text('文本框不能为空'))
      );
    }else{
      // 拿到用户输入的文字，并更新画面
      getHttp(typeController.text.toString()).then((val){
        setState(() {
          showText = val['data']['name'].toString();
        });
      });
    }
  }
  Future getHttp(String TypeText) async {
    try{
  
      Response response;
      var data = {'name':TypeText};
      // 这个链接是easy-mock 里面做的假数据
      // 如果使用post请求直接在这里换成post请求方式就行了
      response = await Dio().get("https://www.easy-mock.com/mock/5c60131a4bed3a6342711498/baixing/dabaojian",
      queryParameters:data
      );
      return response.data;
    }catch(e){
      print(e);
    }
  }
}