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pubspec.yaml


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dependencies:
  ...
  http: ^0.12.0+1
  xml: ^3.4.1
  url_launcher: ^5.0.2

main.dart


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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter ListView Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter ListView Sample'),
    );
  }
}

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

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  var list = [];

  @override
  void initState() {
    super.initState();

    this.getData(() {
      setState(() { });
    });
  }

  void getData(Function callback) async {
    var response = await http.get("https://blog.wonhada.com/?feed=atom");
    if (response.statusCode == 200) {
      xml.XmlDocument doc = xml.parse(utf8.decode(response.bodyBytes));
      list = doc.findAllElements('entry').toList();
      callback();
    } else {
      print("Error: ${response.statusCode}.");
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: ListView.builder(
        padding: const EdgeInsets.all(10.0),
        itemCount: list.length,
        itemBuilder: (context, idx) {
          if(list.length < 1) { return null; }

          return _buildRow(list[idx]);
        },
      ),
    );
  }

  Widget _buildRow(xml.XmlElement elem) {
    return ListTile(
      title: Text(elem.findElements('title').first.firstChild.text),
      subtitle: Text(elem.findElements('published').first.firstChild.text),
      onTap: () {
        launch(elem.findElements('link').first.getAttribute('href'));
      },
    );
  }
}