Android/Flutter simple news feed sim

news_sim.dart

import 'dart:typed_data';
import 'package:firebase_core/firebase_core.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'dart:convert';
import 'package:intl/intl.dart';

class ArticleModel {
  String title;
  String body;
  Uint8List img;
  Timestamp dt;

  ArticleModel(this.title, this.body, this.img, this.dt);

  ArticleModel.fromDocumentSnapshot(DocumentSnapshot doc) {
    this.title = doc.data()['title'];
    this.body = doc.data()['body'];
    this.img = base64Decode(doc.data()['img']);
    this.dt = doc.data()['dt'];
  }
}

Container articleImageHeaderView(MemoryImage img) {
  return Container(
    height: 200,
    decoration:
        BoxDecoration(image: DecorationImage(image: img, fit: BoxFit.fill)),
  );
}

Container articleBodyView(String body) {
  return Container(
    child: Text(body,
        textAlign: TextAlign.justify,
        style: TextStyle(fontSize: 16, fontWeight: FontWeight.w400)),
    padding: EdgeInsets.all(10.0),
  );
}

Container articleTitleView(String title) {
  return Container(
    child: Text(title,
        textAlign: TextAlign.center,
        style: TextStyle(fontSize: 28, fontWeight: FontWeight.w700)),
    padding: EdgeInsets.all(10.0),
  );
}

Container articleDateView(Timestamp ts) {
  DateFormat format = new DateFormat("EEEE, MMMM d yyyy");
  String dt = format.format(ts.toDate());
  return Container(
    child: Text(dt,
        textAlign: TextAlign.center,
        style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500)),
    padding: EdgeInsets.all(10.0),
  );
}

SingleChildScrollView articlePageViewContainer(
    ArticleModel article, BuildContext context) {
  return SingleChildScrollView(
      child: Container(
          width: MediaQuery.of(context).size.width,
          child: Column(children: [
            articleImageHeaderView(MemoryImage(article.img)),
            articleTitleView(article.title),
            articleDateView(article.dt),
            articleBodyView(article.body)
          ])));
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) => MaterialApp(home: Splash());
}

class Splash extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(body: Article());
  }
}

class Article extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    Query users = FirebaseFirestore.instance
        .collection('news')
        .orderBy('dt', descending: true)
        .limit(10);

    return StreamBuilder<QuerySnapshot>(
      stream: users.snapshots(),
      builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
        if (snapshot.hasError) return Text('Something went wrong');
        if (snapshot.connectionState == ConnectionState.waiting)
          return Text("Loading");

        var article = snapshot.data.docs
            .map((doc) => new ArticleModel.fromDocumentSnapshot(doc))
            .toList();

        return new PageView(
            children: article
                .map((a) => articlePageViewContainer(a, context))
                .toList());
      },
    );
  }
}