flutter网络请求json-蒲公英云

flutter网络请求json

男娘i 2022-05-22 05:57 300阅读 0赞

import 'dart:async';
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';
//使用网络请求json
class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
  final String url = "https://swapi.co/api/people";
  List data;
  @override
  void initState() {
    super.initState();
    this.getJsonData();
  }
  Future<String> getJsonData() async{
    var response = await http.get(
      //encode the url
      Uri.encodeFull(url),
      //only accept json response
      headers: {
  "Accept": "application/json"}
    );
    print(response.body);
    setState(() {
      // ignore: deprecated_member_use
      var convertDataToJson = JSON.decode(response.body);
      data= convertDataToJson['results'];
    });
    return "Success";
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Retrieve Json via Http get"),
      ),
      body: ListView.builder(
        itemCount: data == null? 0:data.length,
        itemBuilder: (BuildContext context,int index){
          return Container(
            child: Center(
              child: Center(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: <Widget>[
                    Card(
                      child: Container(
                        child: Text(data[index]['name']),
                        padding: EdgeInsets.all(20.0),
                      ),
                    )
                  ],
                ),
              ),
            ),
          );
        },
      ),
    );
  }
}