Asset-App/lib/util/photo_viewer.dart

import 'dart:typed_data';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:photo_view/photo_view.dart';
import 'utils.dart';

class PhotoViewer extends StatefulWidget {
  Uint8List byte;
  PhotoViewer(this.byte);
//  PhotoViewer({Key key}) : super(key: key);
  @override
  _PhotoViewerState createState() => _PhotoViewerState();
}

class _PhotoViewerState extends State<PhotoViewer> {
  Util util = new Util();
  @override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
        Flexible(
          flex: 8,
          child:  Container(
            child: PhotoView(
              imageProvider: MemoryImage(widget.byte),
            ),
          ),
        ),
      ],
    );
  }
}