Flutter:显示HTTP响应中的文本

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

class MyHttpTextWidget extends StatefulWidget {
  @override
  _MyHttpTextWidgetState createState() => _MyHttpTextWidgetState();
}

class _MyHttpTextWidgetState extends State<MyHttpTextWidget> {
  String _responseText = '';

  Future<void> _fetchData() async {
    final response = await http.get('https://example.com/api/data');
    if (response.statusCode == 200) {
      setState(() {
        _responseText = response.body;
      });
    } else {
      setState(() {
        _responseText = 'Error: ${response.statusCode}';
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('HTTP Text Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            RaisedButton(
              onPressed: _fetchData,
              child: Text('Fetch Data'),
            ),
            SizedBox(height: 20),
            Text(_responseText),
          ],
        ),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: MyHttpTextWidget(),
  ));
}