Share content for flutter

pub package

A simple plugin for Flutter to share content.

This content could be a picture but also a message. Furthermore a title can be added to show in the sharing screen.

Every version of Android is supported, included from version 24 and above. For those devices is mandatory the use of FileProvider class in order to grant access to the images stored in the phone.

Version 0.2.0 is supporting androidX.

iOS is not going to be implemented because I don't have a macOS.

Installation

First add flutter_share_content as a dependency in your pubsec.yaml

Android

Add this in your build.gradle

dependencies {
    api 'androidx.legacy:legacy-support-v4:1.0.0'
}

And this in your AndroidManifest.xml

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

...

<provider
    android:name="androidx.core.content.FileProvider"
    android:authorities="${applicationId}.provider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/filepaths"/>
</provider>

Also create res/filepaths.xml with this content

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>

Example

import 'package:flutter/material.dart';
import 'dart:async';
import 'dart:io';

import 'package:image_picker/image_picker.dart';
import 'package:flutter_share_content/flutter_share_content.dart';

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


class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: "Share Content example app",
      debugShowCheckedModeBanner: false,
      home: ShareContent(),
    );
  }
}

class ShareContent extends StatefulWidget {
  @override
  _ShareContentState createState() => _ShareContentState();
}

class _ShareContentState extends State<ShareContent> {
  File _image;
  TextEditingController _title = new TextEditingController();
  TextEditingController _msg =  new TextEditingController();
  TextEditingController _subject = new TextEditingController();
  BuildContext _context;

  Future getImage() async {
    File image = await ImagePicker.pickImage(source: ImageSource.gallery);

    setState(() {
      _image = image;
    });
  }

  void getText(){
    showModalBottomSheet(context: _context,
        builder:(BuildContext context) {
          return new Container(
            child: new Column(
              children: <Widget>[
                new TextField(
                  decoration: InputDecoration(
                    border: OutlineInputBorder(),
                    hintText: "Title",
                    contentPadding: EdgeInsets.only(bottom: 50.0, top: 10.0, left: 12.0),
                  ),

                  controller: _title,
                ),
                new TextField(
                  decoration: InputDecoration(
                      border: OutlineInputBorder(),
                      hintText: "Message",
                    contentPadding: EdgeInsets.only(bottom: 150.0, top: 10.0, left: 12.0),
                  ),
                  maxLines: null,
                  keyboardType: TextInputType.multiline,

                  controller: _msg,
                )
              ],
            ),
          );
        }
    );
  }

  void share(){
    FlutterShareContent.shareContent(imageUrl: _image == null? null: _image.path,
        msg: _msg.text, title: _title.text);
  }

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    _context = context;
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Share Content example app'),
        ),
        body: new Center(
          child: _image == null
              ? new Text('No image selected.')
              : new Image.file(_image),
        ),
        floatingActionButton:
        FloatingActionButton(onPressed: share, child: Icon(Icons.share),),

        bottomNavigationBar:
        BottomAppBar(
          child:
          Row(
            children: <Widget>[
              new FloatingActionButton(
                onPressed: getImage,
                tooltip: 'Pick Image',
                child: new Icon(Icons.camera_alt),
              ),
              new FloatingActionButton(
                onPressed: getText,
                tooltip: 'Show text',
                child: new Icon(Icons.text_fields),
              ),
            ],
          )

        ),

      ),
    );
  }
}

Libraries

flutter_share_content

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]