首页 > 解决方案 > 在flutter上使用最新版本的相机包时如何修复错误

问题描述

我是一名新手开发人员,正在使用 plutter 进行开发。我正在使用相机包开发过滤器应用程序。您使用的软件包版本是相机:^0.8.1+5。

我从flutter.dev中拿官方的例子来用,但是问题是运行app时第一次拍照,图片库中不再保存。仅拍摄并保存第一张照片。

我使用一个包来保存画廊照片,image_gallery_saver:^1.6.9

以下是代码部分。有什么问题?我在这上面花了一个星期,但我不知道。我需要专家的帮助。谢谢

class _TakePictureScreenState extends State<TakePictureScreen> {
  late CameraController _controller;
  late Future<void> _initializeControllerFuture;
  XFile? imageFile;

  @override
  void initState() {
    super.initState();
    _controller = CameraController(
      widget.camera,
      ResolutionPreset.high,
    );
    _initializeControllerFuture = _controller.initialize();
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: FutureBuilder<void>(
        future: _initializeControllerFuture,
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.done) {
            return Container(
              child: CameraPreview(_controller),
            );
          } else {
            return Center(
              child: CircularProgressIndicator(),
            );
          }
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          try {
            await _initializeControllerFuture;
            final path = join(
              (await getApplicationDocumentsDirectory()).path,
              '${DateTime.now()}.png',
            );

            imageFile = await _controller.takePicture();
            imageFile!.saveTo(path);

            Fluttertoast.showToast(msg: 'take Picture');
            ImageGallerySaver.saveFile(path);

            // Navigator.push(
            //   context,
            //   MaterialPageRoute(
            //     builder: (context) => DisplayPictureScreen(imagePath: path),
            //   ),
            // );
          } catch (e) {
            Fluttertoast.showToast(msg: e.toString());
          }
        },
      ),
    );
  }
}

标签: fluttercamera

解决方案


I fixed it. The picture is starting to be taken properly. I hope people who use the latest version of the camera package refer to it.

            _controller.takePicture().then((XFile? file) {
          if (mounted) {
            setState(() {
              imageFile = file;
            });
            if (file != null)
              Fluttertoast.showToast(msg: 'Picture saved to ${file.path}');
              ImageGallerySaver.saveFile(file!.path);
          }
        });

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