Flutter app that loads images from the camera roll and displays them in a ListView

main.dart

import 'dart:io';

import 'package:flutter/material.dart';

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

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

class ImageList extends StatelessWidget {
  static final Directory _photoDir =
      new Directory('/storage/emulated/0/DCIM/Camera');

  @override
  Widget build(BuildContext context) {
    List<FileSystemEntity> _photoList;

    Widget buildPhoto(int index) {
      if (index >= _photoList.length) {
        return null;
      }
      print('Loading photo[${index}]: ${_photoList[index]}... done');
      return new Container(
        margin: EdgeInsets.all(8.0),
        child: new Image.file(
          _photoList[index],
          // Use small images to fit more on the screen at once
          // Shows the loading speed more clearly
          width: 96.0,
          height: 96.0,
          scale: 16.0,
          fit: BoxFit.contain,
        ),
      );
    }

    Widget buildPhotoList() {
      _photoList = _photoDir.listSync();
      return new ListView.builder(
        itemBuilder: (BuildContext context, int index) => buildPhoto(index),
      );
    }

    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Image list"),
      ),
      body: new Center(
        child: new Align(
          alignment: Alignment.topCenter,
          child: buildPhotoList(),
        ),
      ),
    );
  }
}

FileSystemException: Directory listing failed, path = '/storage/emulated/0/DCIM/Camera/'

Appears this isn't the right path for my build. Do you know how I could find the right path?

Thanks!