Share local image with Flutter - flutter

Question

I want to share an image that I took from the CameraController.
I location of the file is as example /data/user/0/com.user.test/cache/2019-09-10 16:32:52.281842.png
How it is possible to share this local image?
I added these two line for read/write to local storage:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
I use the share component from https://pub.dev/packages/esys_flutter_share which works great.
void _sharePicture() async {
print('Share picture');
print(this.imagePath);
final ByteData bytes = await rootBundle.load(this.imagePath);
await Share.file('esys image', 'esys.png', bytes.buffer.asUint8List(), 'image/png', text: 'My optional text.');
}
this.imagePath is the local location of the file: :/data/user/0/com.user.test/cache/2019-09-10 16:32:52.281842.png
Do you first have to save the image? And the use it for sharing? How is it possible to share this local image?

Answer 1

The idea is share Uint8List
This demo use camera_camera package's example. https://github.com/gabuldev/camera_camera/tree/master/example
camera_camera package https://pub.dev/packages/camera_camera is an greate package have well made features and use camera plugin inside
code snippet
after click take picture, the system return a file (val in this example), read bytes and transfer to Uint8List
print("path ${val}");
List<int> bytes = await val.readAsBytes();
Uint8List ubytes = Uint8List.fromList(bytes);
await Share.file('ESYS AMLOG', 'amlog.jpg', ubytes, 'image/jpg');
full code
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:camera_camera/camera_camera.dart';
import 'dart:typed_data';
import 'package:esys_flutter_share/esys_flutter_share.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: HomeScreen(),
);
}
}
class HomeScreen extends StatefulWidget {
#override
_HomeScreenState createState() => _HomeScreenState();
}
class _HomeScreenState extends State<HomeScreen> {
File val;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("Rully")),
floatingActionButton: FloatingActionButton(
child: Icon(Icons.camera_alt),
onPressed: () async {
val = await showDialog(
context: context,
builder: (context) => Camera(
mode: CameraMode.fullscreen,
orientationEnablePhoto: CameraOrientation.landscape,
/*
imageMask: CameraFocus.square(
color: Colors.black.withOpacity(0.5),
),
*/
));
print("path ${val}");
List<int> bytes = await val.readAsBytes();
Uint8List ubytes = Uint8List.fromList(bytes);
await Share.file('ESYS AMLOG', 'amlog.jpg', ubytes, 'image/jpg');
setState(() {});
}),
body: Center(
child: Container(
height: MediaQuery.of(context).size.height * 0.7,
width: MediaQuery.of(context).size.width * 0.8,
child: val != null
? Image.file(
val,
fit: BoxFit.contain,
)
: Text("Tire a foto"))));
}
}
demo screen
In camera_camera example take picture button will show in landscape mdoe
file path display in bottom
For camera plugin official example, I only change the following
code snippet
void onTakePictureButtonPressed() {
takePicture().then((String filePath) async{
if (mounted) {
setState(() {
imagePath = filePath;
videoController?.dispose();
videoController = null;
});
if (filePath != null) {
showInSnackBar('Picture saved to $filePath');
File val = File(filePath);
List<int> bytes = await val.readAsBytes();
Uint8List ubytes = Uint8List.fromList(bytes);
await Share.file('ESYS AMLOG', 'amlog.jpg', ubytes, 'image/jpg');
}
}
});
}