image_gallery_saver 0.1.0

A new flutter plugin project for save image to gallery, iOS need to add the following keys to your Info.plist file, the key is called Privacy - Photo Library Additions Usage Description in the visual editor.

example/lib/main.dart

import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'dart:ui' as ui;

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Save image to gallery',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  GlobalKey _globalKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(""),
        ),
        body: RepaintBoundary(
          key: _globalKey,
          child: Center(
            child: Container(
              child: RaisedButton(
                onPressed: _saved,
                child: Text("保存屏幕截图"),
              ),
              width: 100,
              height: 50,
            ),
          ),
        ));
  }

  _saved() async {
    RenderRepaintBoundary boundary =
        _globalKey.currentContext.findRenderObject();
    ui.Image image = await boundary.toImage();
    ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
    final result = await ImageGallerySaver.save(byteData.buffer.asUint8List());
  }
}