save_in_gallery 0.1.3

Flutter plugin that allows you to save images in native gallery in both Android and iOS. You can either save them in default album or in named album of your choice.

example/lib/main.dart

import 'dart:async';
import 'dart:ui';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:save_in_gallery/save_in_gallery.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _imageSaver = ImageSaver();

  bool _isLoading = false;
  bool _showResult = false;
  String _resultText = "";
  Color _resultColor = Colors.red;

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

  /// Fetches image from web and saves in gallery
  Future<void> saveNetworkImage() async {
    _startLoading();
    final url =
        "https://solarsystem.nasa.gov/system/downloadable_items/519_solsticeflare.jpg";
    final image = NetworkImage(url);
    final key = await image.obtainKey(ImageConfiguration());
    final load = image.load(key);
    load.addListener(
      ImageStreamListener((listener, err) async {
        final byteData =
            await listener.image.toByteData(format: ImageByteFormat.png);
        final bytes = byteData.buffer.asUint8List();
        final res = await _imageSaver.saveImage(
          imageBytes: bytes,
          directoryName: "dir_name",
        );
        _stopLoading();
        _displayResult(res);
        print(res);
      }),
    );
  }

  /// Saves one of asset images to gallery
  Future<void> saveAssetImage() async {
    _startLoading();
    final urls = ["assets/sun.jpg"];
    List<Uint8List> bytesList = [];
    for (final url in urls) {
      final bytes = await rootBundle.load(url);
      bytesList.add(bytes.buffer.asUint8List());
    }
    final res = await _imageSaver.saveImages(imageBytes: bytesList);
    _stopLoading();
    _displayResult(res);
    print(res);
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Stack(
          children: <Widget>[
            Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Container(),
                RaisedButton(
                  onPressed: () => saveNetworkImage(),
                  child: Text("Save image from web"),
                ),
                SizedBox(height: 16.0),
                RaisedButton(
                  onPressed: () => saveAssetImage(),
                  child: Text("Save image from assets"),
                ),
                AnimatedOpacity(
                  opacity: _showResult ? 1.0 : 0.0,
                  duration: Duration(seconds: 1),
                  child: Text(
                    _resultText,
                    style: TextStyle(color: _resultColor),
                  ),
                )
              ],
            ),
            _progressIndictaor,
          ],
        ),
      ),
    );
  }

  Widget get _progressIndictaor {
    return _isLoading
        ? Container(
            child: Center(child: CircularProgressIndicator()),
            color: Color.fromRGBO(0, 0, 0, 0.3),
          )
        : Container();
  }

  void _startLoading() {
    setState(() {
      _isLoading = true;
    });
  }

  void _stopLoading() {
    setState(() {
      _isLoading = false;
    });
  }

  void _displayResult(bool success) {
    _showResult = true;
    if (success) {
      _displaySuccessMessage();
    } else {
      _displayErrorMessage();
    }
    Timer(Duration(seconds: 2), () {
      _hideResult();
    });
  }

  void _displaySuccessMessage() {
    setState(() {
      _resultText = "Images saved successfullty";
      _resultColor = Colors.green;
    });
  }

  void _displayErrorMessage() {
    setState(() {
      _resultText = "An error occurred while saving images";
      _resultColor = Colors.red;
    });
  }

  void _hideResult() {
    setState(() {
      _showResult = false;
    });
  }
}