medicine-capture/lib/common/zoom_image.dart

import 'package:flutter/material.dart';
import 'package:capture/common/settings.dart';
import 'package:photo_view/photo_view.dart';
class ImageZoomPage extends StatefulWidget {
  var imageName;
  var imageDetails;
  ImageZoomPage({this.imageName,this.imageDetails});


  @override
  State<ImageZoomPage> createState() => _ImageZoomPageState();
}

class _ImageZoomPageState extends State<ImageZoomPage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar:AppBar(
        backgroundColor: primaryColor,
        title: Text(widget.imageName),
        actions: [
          IconButton(
            onPressed: () {

              Navigator.pop(context);
            },
            icon: Icon(
              Icons.cancel,
              color: Colors.red,
              size: 30,
            ),
          ),
        ],
      ),
      body: Container(
          //width: MediaQuery.of(context).size.width * .10,
          //height: MediaQuery.of(context).size.height * .50,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Padding(padding:EdgeInsets.fromLTRB(10,10,10,0),
              child: Text('Use two fingers to zoom/double tap',style: TextStyle(color: Colors.black,fontSize: 12),),),
              SizedBox(height:MediaQuery.of(context).size.height * .02,),
              Expanded(
                child: PhotoView(
                  imageProvider: NetworkImage(widget.imageDetails) as ImageProvider,
                  maxScale: PhotoViewComputedScale.contained * 4.0,
                  minScale: PhotoViewComputedScale.contained,
                  initialScale: PhotoViewComputedScale.contained,
                  basePosition: Alignment.center,

                ),
              )
            ],
          )
      ),

    );
  }
}