1、播放视频

class _VideoDetailPagerState extends State<VideoDetailPager> {
  late VideoPlayerController videoPlayerController;
  late ChewieController chewieController;
  @override
  void initState() {
    super.initState();
    _initVideo();
  }

  _initVideo() async {
    videoPlayerController = VideoPlayerController.networkUrl(
        Uri.parse('https://media.w3.org/2010/05/sintel/trailer.mp4'));
    chewieController = ChewieController(
      videoPlayerController: videoPlayerController,
      aspectRatio: 3 / 2,
      autoPlay: true,
      looping: true,
      optionsBuilder: (context, defaultOptions) async {
//defaultOptions保存了对应的按钮 先打印然后再去自定义
        return await showModalBottomSheet(
            context: context,
            builder: (context) {
              return SizedBox(
                height: 120,
                child: ListView(
                  children: [
                    ListTile(
                      title: const Text("播放速度"),
                      onTap: () {
                        defaultOptions[0].onTap!();
                      },
                    ),
                    ListTile(
                      title: const Text("取消"),
                      onTap: () {
                        Navigator.of(context).pop();
                      },
                    )
                  ],
                ),
              );
            });
      },
    );
  }

/*销毁*/
  @override
  void dispose() {
    videoPlayerController.dispose();
    chewieController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('在线视频播放'),
      ),
      body: Center(
          child: SizedBox(
        child: AspectRatio(
          aspectRatio: 3 / 2,
          child: Chewie(
            controller: chewieController,
          ),
        ),
      )),
    );
  }
}

2、ImagePicker拍照、录制视频、相册选择照片、相册选择视频
注意：android无需配置开箱即用，ios还需要配置info.plist

<key>NSPhotoLibraryUsageDescription</key>
<string>应用需要访问相册读取文件</string>
<key>NSCameraUsageDescription</key>
<string>应用需要访问相机拍照</string>
<key>NSMicrophoneUsageDescription</key>
<string>应用需要访问麦克风录制视频</string>

注意：使用相机拍摄的图像和视频会保存到应用程序的本地缓存中，因此应该只是暂时存在。如果您需
要永久存储您挑选的图像，您有责任将其移动到更永久的位置
ImagePicker拍照、相册选择照片及上传

class _ImageChoicePagerState extends State<ImageChoicePager> {
  ImagePicker imagePicker = ImagePicker();
  XFile? xFile;
  //拍照
  takePhoto() async {
    XFile? pickFile = await imagePicker.pickImage(
        source: ImageSource.camera, maxHeight: 600, maxWidth: 600);
    if (pickFile != null) {
      setState(() {
        xFile = pickFile;
      });
      //上传图片
      uploadFile(pickFile.path);
    }
  }

//相册
  openGallery() async {
    XFile? pickFile = await imagePicker.pickImage(
        source: ImageSource.gallery, maxHeight: 600, maxWidth: 600);
    if (pickFile != null) {
      setState(() {
        xFile = pickFile;
      });
      //上传图片
      uploadFile(pickFile.path);
    }
  }

  uploadFile(String imagePath) async {
    var formData = FormData.fromMap({
      'name': 'wendux',
      'age': 25,
      'file': await MultipartFile.fromFile(imagePath, filename: 'aaa.png'),
    });
    var response =
        await Dio().post('https://jdmall.itying.com/imgupload', data: formData);
    print(response);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("title")),
      body: Center(
        child: ListView(padding: const EdgeInsets.all(12), children: [
          ElevatedButton(onPressed: takePhoto, child: const Text("拍照")),
          const SizedBox(
            height: 20,
          ),
          ElevatedButton(onPressed: openGallery, child: const Text("相册选择")),
          const SizedBox(
            height: 20,
          ),
          xFile == null
              ? const Text("选择图片")
              : Image.file(File(xFile!.path)), //引入dart:io库
        ]),
      ),
    );
  }
}

ImagePicker录制视频、相册选择视频及上传

class _VideoChoicePagerState extends State<VideoChoicePager> {
  ImagePicker imagePicker = ImagePicker();
  XFile? xFile;
  late ChewieController chewieController;
  late VideoPlayerController videoPlayerController;
  initVideo(fileDir) async {
    videoPlayerController = VideoPlayerController.file(fileDir);
    //初始化完成后才可以获取宽高比
    await videoPlayerController.initialize();
    chewieController = ChewieController(
      videoPlayerController: videoPlayerController,
      aspectRatio: videoPlayerController.value.aspectRatio, //配置视频的宽高比
      autoPlay: true,
    );
  }

  @override
  void dispose() {
    super.dispose();
    videoPlayerController.dispose();
    chewieController.dispose();
  }

  //录制视频
  takePhoto() async {
    XFile? pickFile = await imagePicker.pickVideo(source: ImageSource.camera);
    if (pickFile != null) {
      await initVideo(File(pickFile.path)); //引入dart:io库
      setState(() {
        xFile = pickFile;
      });
      //上传视频
      uploadFile(pickFile.path);
    }
  }

//相册视频选择
  openGallery() async {
    XFile? pickFile = await imagePicker.pickVideo(source: ImageSource.gallery);
    if (pickFile != null) {
      await initVideo(File(pickFile.path)); //引入dart:io库
      setState(() {
        xFile = pickFile;
      });
      //上传视频
      uploadFile(pickFile.path);
    }
  }

  uploadFile(String videoPath) async {
    var formData = FormData.fromMap({
      'name': 'videoName',
      'age': 35,
      'file': await MultipartFile.fromFile(videoPath, filename: 'aaa.mp4'),
    });
    var response =
        await Dio().post('https://jdmall.itying.com/imgupload', data: formData);
    print(response);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("title")),
      body: Center(
        child: ListView(padding: const EdgeInsets.all(12), children: [
          ElevatedButton(onPressed: takePhoto, child: const Text("录制视频")),
          const SizedBox(
            height: 20,
          ),
          ElevatedButton(onPressed: openGallery, child: const Text("相册视频选择")),
          const SizedBox(
            height: 20,
          ),
          xFile == null
              ? const Text("选择视频")
              : AspectRatio(
                  aspectRatio: videoPlayerController.value.aspectRatio,
                  child: Chewie(controller: chewieController),
                ),
        ]),
      ),
    );
  }
}