@pragma("vm:external-name", "Error_throwWithStackTrace") external static Never _throw(Object error, StackTrace stackTrace);

Question

我正在尝试使用

VideoPlayer

包显示文件中的视频，如下所示：

      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          videoFileShow == null ||
                  videoFileShow!.length <= movie.videoIndex
              ? Image.asset('assets/images/video-placeholder.jpg')
              : VideoPlayerWidget(
                  isNetwork: false,
                  videoAddress: videoFileShow![movie.videoIndex]

                  ),

这是

VideoPlayerWidget.dart

：

class VideoPlayerWidget extends StatefulWidget {
  final dynamic? videoAddress;
  final bool? isNetwork;
  const VideoPlayerWidget({Key? key, this.isNetwork, this.videoAddress})
      : super(key: key);

  @override
  State<VideoPlayerWidget> createState() => _VideoPlayerWidgetState();
}

class _VideoPlayerWidgetState extends State<VideoPlayerWidget> {
  VideoPlayerController? controller;

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

    if (widget.isNetwork!) {
      controller = VideoPlayerController.network(widget.videoAddress!)
        ..addListener(() => setState(() {}))
        ..setLooping(false)
        ..initialize().then((_) => controller!.pause());
    } else {
      print(VideoPlayerController.file(widget.videoAddress));
      VideoPlayerController.file(widget.videoAddress!)
        ..addListener(() => setState(() {}))
        ..setLooping(false)
        ..initialize().then((_) => controller!.pause());
      print('here?');
    }
  }

  @override
  void dispose() {
    super.dispose();
    controller!.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      alignment: Alignment.center,
      child: Column(children: [
        VideoPlayerBaseWidget(controller: controller),
      ]),
    );
  }
}

但是我得到以下错误：

  @patch
  @pragma("vm:external-name", "Error_throwWithStackTrace")
  external static Never _throw(Object error, StackTrace stackTrace);

EDIT

：我在

else

语句中添加了 2 个打印命令，这是第一个可能有帮助的结果（第二个打印未执行）：

我/颤动（5055）： VideoPlayerController#ba01e(VideoPlayerValue(持续时间: 0:00:00.000000, 大小：大小（0.0，0.0），位置：0：00：00.000000，标题： 标题（数字：0，开始：0：00：00.000000，结束：0：00：00.000000，文本： ), captionOffset: 0:00:00.000000, buffered: [], isInitialized: false, isPlaying: false, isLooping: false, isBuffering: false, volume: 1.0, playbackSpeed: 1.0, errorDescription: null))