How Do I Share Image On Ios And Android Using Flutter

dependencies:
  flutter:
    sdk: flutter
  share: ^0.6.5+1
  image_picker: ^0.6.7+9
  firebase_storage: ^4.0.0
  html: ^0.14.0+3

flutter pub get

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:share/share.dart';
import 'package:firebase_storage/firebase_storage.dart';
import 'dart:io';
import 'package:path/path.dart';

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:share/share.dart';
import 'package:firebase_storage/firebase_storage.dart';
import 'dart:io';
import 'package:path/path.dart';

void main() {
  runApp(DemoApp());
}

class DemoApp extends StatefulWidget {
  @override
  DemoAppState createState() => DemoAppState();
}

class DemoAppState extends State<DemoApp> {
  File _image;


  String text = '';
  String subject = '';
  List<String> imagePaths = [];

  @override
  Widget build(BuildContext context) {
    Future getImage() async {
      var image = await ImagePicker.pickImage(source: ImageSource.gallery);

      setState(() {
        _image = image;
        print('Image Path $_image');
      });
    }
    Future uploadPic(BuildContext context) async{
      String fileName = basename(_image.path);
      StorageReference firebaseStorageRef = FirebaseStorage.instance.ref().child(fileName);
      StorageUploadTask uploadTask = firebaseStorageRef.putFile(_image);
      StorageTaskSnapshot taskSnapshot=await uploadTask.onComplete;
      setState(() {
        print("Profile Picture uploaded");
        Scaffold.of(context).showSnackBar(SnackBar(content: Text('Profile Picture Uploaded')));
      });
    }


    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Share Plugin Demo',
      home: Scaffold(
          appBar: AppBar(
            centerTitle: true,
            backgroundColor: Colors.indigo,
            title: const Text('Share Plugin Image Demo'),
            leading: Icon(Icons.chevron_left),
          ),
          body: SingleChildScrollView(
            child: Padding(
              padding: const EdgeInsets.all(24.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  ListTile(
                    title: RaisedButton.icon(
                      color: Colors.pink,
                      onPressed: () {
                        getImage();
                      },
                      label: Text('Add Image', style: TextStyle(color: Colors.white),),
                      icon: Icon(Icons.add, color: Colors.white,),
                    ),
                  ),
                  SizedBox(height: 20.0,),
                  Container(
                    child: (_image!=null)?Image.file(
                      _image,
                      fit: BoxFit.fill,
                    ):Image.network("https://images.unsplash.com/photo-1502164980785-f8aa41d53611?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60",
                      fit: BoxFit.fill,
                    ),
                  ),
                  const Padding(padding: EdgeInsets.only(top: 12.0)),
                  Builder(
                    builder: (BuildContext context) {
                      return RaisedButton(
                        color: Colors.indigo,
                        child: const Text('Share',style: TextStyle(color:Colors.white),),
                        onPressed: text.isEmpty && imagePaths.isEmpty
                            ? null
                            : () => _onShare(context),
                      );
                    },
                  ),
                ],
              ),
            ),
          )),
    );
  }

  _onShare(BuildContext context) async {
    final RenderBox box = context.findRenderObject();

    if (imagePaths.isNotEmpty) {
      await Share.shareFiles(imagePaths,
          text: text,
          subject: subject,
          sharePositionOrigin: box.localToGlobal(Offset.zero) & box.size);
    } else {
      await Share.share(text,
          subject: subject,
          sharePositionOrigin: box.localToGlobal(Offset.zero) & box.size);
    }
  }
}