小编Ann*_*ess的帖子

我目前正在开发一个 flutter web 应用程序，用户应该能够预览相机并手动保存图片。因此我使用官方的相机插件。我能够初始化相机、预览内容并在按下按钮时保存图片。

import 'dart:convert';
import 'dart:typed_data';
import 'package:flutter/material.dart';

import 'package:camera/camera.dart';
import 'package:image/image.dart' as img;

late List<CameraDescription> _cameras;

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  _cameras = await availableCameras();
  runApp(const CameraApp());
}

class CameraApp extends StatefulWidget {
  const CameraApp({Key? key}) : super(key: key);

  @override
  State<CameraApp> createState() => _CameraAppState();
}

class _CameraAppState extends State<CameraApp> {
  late CameraController controller;
  Image? image;

  @override
  void initState() {
    super.initState();
    // define and initialize the camera controller once
    controller = CameraController(
      _cameras[0],
      ResolutionPreset.max,
      imageFormatGroup: ImageFormatGroup.jpeg,
    );
    controller.initialize().then((_) …