image_picker guide main file

main.dart

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';

void main() =>runApp(PictureShowcaseApp());
         
class PictureShowcaseApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: PictureShowcaseHome("My Best Pictures"),
      title: "My Best Pictures"
    );
  }
}

class PictureShowcaseHome extends StatefulWidget {
  final String title;

  PictureShowcaseHome(this.title);
  
  _HomePageState createState() => _HomePageState();

}
          
          
class _HomePageState extends State<PictureShowcaseHome> {
  List<Image> imgs = [];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(widget.title)),
      body: ListView.builder(
        itemCount: imgs.length,
        itemBuilder: (context, i) =>
          Column(
            children: [
              imgs[i],
              Divider()
            ]
          ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.add),
        onPressed: () async {
          var imgFile = await ImagePicker.pickImage(
            source: ImageSource.camera
          );
          setState((){
            imgs.add(Image.file(imgFile));
          });
        }
      ),
    );
  }
}