包地址

https://pub.dartlang.org/packages/http

pubspec.yaml 里面

添加依赖

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dependencies:
  http: ^0.12.0

安装 

vscode 会自动安装，andrio studio 需要手动点击 Pub get

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flutter packages get

导入

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import 'package:http/http.dart' as http;

使用案例

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// http请求 方式1
httpRequest1(){
  var url = 'https://randomuser.me/api/?results=30';
  http.get(Uri.parse(url)).then((res){
    print("获取到的数据：${res.body}" );
  });
}
// http 请求 方式2 原生
httpRequest2() async {
  var url = 'https://randomuser.me/api/?results=30';
  try {
    var response = await http.get(Uri.parse(url));
    if (response.statusCode == 200) {
      var jsonString = response.body;
      print(jsonString);
    } else {
      print('请求失败状态为: ${response.statusCode}');
    }
  } catch (e) {
    print('错误: $e');
  }
}

参考来源：

https://www.cnblogs.com/zhujiabin/p/10333253.html