// SPDX-FileCopyrightText: 2022 Iconica // // SPDX-License-Identifier: BSD-3-Clause import 'package:flutter/foundation.dart'; import 'package:flutter/material.dart'; import 'package:flutter_image_picker/flutter_image_picker.dart'; void main() { runApp(const ImagePickerExample()); } class ImagePickerExample extends StatelessWidget { const ImagePickerExample({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Image Picker Example', theme: ThemeData( primarySwatch: Colors.blue, ), home: const ImagePickerExampleHomePage( title: 'Flutter Image Picker Example'), ); } } class ImagePickerExampleHomePage extends StatefulWidget { const ImagePickerExampleHomePage({Key? key, required this.title}) : super(key: key); final String title; @override ImagePickerExampleHomePageState createState() => ImagePickerExampleHomePageState(); } class ImagePickerExampleHomePageState extends State { final double whiteSpace = 20; final double imageWidth = 300; final String placeholder = 'assets/images/placeholder.png'; final String imageAlreadyDisplayedMessage = 'The selected image is already being displayed!'; Uint8List? uploadedImage; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), actions: [ IconButton( onPressed: () { setState(() { uploadedImage = null; }); }, icon: const Icon(Icons.delete)) ], ), body: Center( child: SingleChildScrollView( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Column(children: [ if (uploadedImage == null) ...[ Image.asset( placeholder, width: imageWidth, height: imageWidth, ) ] else ...[ Image.memory( uploadedImage!, width: imageWidth, height: imageWidth, ) ] ]), SizedBox(height: whiteSpace), const Text( 'Pick an image or make a photo!', ), SizedBox(height: whiteSpace / 2), ElevatedButton( onPressed: pickImage, key: const Key("PickImageButton"), child: const Text('Pick Image')), SizedBox(height: whiteSpace), ], ), ), ), ); } /// The [pickImage] function is used to show the usage of the Image Picker Package. /// The most important part is the [ImagePicker] call. /// You can add a custom [ImagePickerTheme] to the [ImagePicker] if you want to change some of the UI. /// An example on how to do that is: ImagePickerTheme(imagePickerTheme: const ImagePickerTheme(title: "Image Picker")). /// As a whole you get `ImagePicker(ImagePickerTheme(imagePickerTheme: const ImagePickerTheme(title: "Image Picker")))` /// Check the README for all possible parameters you can add in the [ImagePickerTheme]. /// You can also add a custom Button as a Widget to the Image Picker Dialog. /// This function saves the image in a variable and if it's different than the current image it will get displayed in the application. /// When the same image is chosen there will be a snackbar popping up to let you know it's already being displayed. void pickImage() async { Uint8List? imageInBytes = await showModalBottomSheet( context: context, backgroundColor: Colors.white, builder: (BuildContext context) => const ImagePicker()); if (imageInBytes != null) { if (!listEquals(uploadedImage, imageInBytes)) { setState(() { uploadedImage = imageInBytes; }); } else { if (!mounted) return; ScaffoldMessenger.of(context).showSnackBar( SnackBar(content: Text(imageAlreadyDisplayedMessage)), ); } } imageInBytes = null; } }