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我无法在 UI 中显示视频，但我得到了 URL，它显示了一些“未处理的异常：错误状态：未来已经完成”

   List<String> videoList = [];
   
   VideoPlayerController _controller;

    @override
   void initState() {
super.initState();
getVideos(context);
  }

  @override
  Future<void> dispose() async {
  super.dispose();
  if (videoList != null && mounted) {
  await _controller.dispose();

   }
}

我要显示视频的代码：

        Container(
              height: 200.0,
              padding: EdgeInsets.symmetric(vertical: 15.0, horizontal: 15.0),
              child: ListView(
                //shrinkWrap: true,
                scrollDirection: Axis.horizontal,
                children: [
                  FutureBuilder (
                      future: hasInitialized,
                      builder: (context, snapshot){
                        if (snapshot.connectionState == ConnectionState.done) {
                          return new ListView.builder(
                            shrinkWrap: true,
                            scrollDirection: Axis.horizontal,
                              itemCount:videoList.length,
                              itemBuilder: (BuildContext context,int index){
                              return Container(
                                height: 180,
                                width: 180,
                                padding: EdgeInsets.all(10),
                                child: _controller.value.isInitialized ?

                                    Stack(
                                      children: [
                                        VideoPlayer(_controller),
                                        _ControlsOverlay(_controller),
                                        // AspectRatioVideo(_controller),
                                      ],
                                    )
                                    :Container()
                              );
                            }
                            );
                        } else {
                          return
                            //Text("No video");
                          Center(child: CircularProgressIndicator(),);
                        }
                      }
                  )
                ],
              ),

            ),

我从中获取视频网址的代码：

                Future  hasInitialized;
         Future<List<String>> getVideos(context) async {
       var document = await          FirebaseFirestore.instance.collection("users").
         doc(auth.currentUser.uid).get();
        List<String> videos = [];
      for (var item in document.data()['videos']) {
        videos.add(item);
             }
       setState(() {
         _controller =    VideoPlayerController.network(videoList.toString());
        // _controller =  VideoPlayerController.network(videoList[videos]);
       _controller.addListener(() {
          setState(() {});
         });
       hasInitialized = _controller.initialize();
       _controller.setLooping(false);
         _controller.initialize();
        });

      videoList= videos;
     print(videoList.length);
    print(videoList);
     return videos;
      }

我得到的错误：

[错误：flutter/lib/ui/ui_dart_state.cc(186)] 未处理的异常：错误状态：未来已经完成 E/flutter (9697)：#0 _AsyncCompleter.complete (dart:async/future_impl.dart:45:31) E/flutter (9697): #1 VideoPlayerController.initialize (package:video_player/video_player.dart:310:25) E/flutter (9697): E/flutter (9697): E/ExoPlayerImplInternal(9697): 播放错误 E/ ExoPlayerImplInternal（9697）：com.google.android.exoplayer2.ExoPlaybackException：源错误 E/ExoPlayerImplInternal（9697）：在 com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage（ExoPlayerImplInternal.java:554） E/ExoPlayerImplInternal（9697）：在 android.os.Handler.dispatchMessage(Handler.java:102) E/ExoPlayerImplInternal(9697): 在 android.os.Looper.loop(Looper.java:223) E/ExoPlayerImplInternal(9697): 在 android.os。HandlerThread.run（HandlerThread.java:67）E/ExoPlayerImplInternal（9697）：由：com.google.android.exoplayer2.upstream.FileDataSource$FileDataSourceException：com.google.android.exoplayer2.upstream.FileDataSource$FileDataSourceException：java。 io.FileNotFoundException: []: 打开失败: ENOENT (没有这样的文件或目录) E/ExoPlayerImplInternal(9697): at com.google.android.exoplayer2.upstream.FileDataSource.open(FileDataSource.java:97) E/ExoPlayerImplInternal( 9697): 在 com.google.android.exoplayer2.upstream.DefaultDataSource.open(DefaultDataSource.java:199) E/ExoPlayerImplInternal(9697): 在 com.google.android.exoplayer2.upstream.StatsDataSource.open(StatsDataSource.java: 84) E/ExoPlayerImplInternal(9697): 在 com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:1013) E/ExoPlayerImplInternal(9697): 在 com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:415) E/ExoPlayerImplInternal(9697): 在 java.util.concurrent.ThreadPoolExecutor。 runWorker(ThreadPoolExecutor.java:1167) E/ExoPlayerImplInternal(9697): 在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) E/ExoPlayerImplInternal(9697): 在 java.lang.Thread.run( Thread.java:923）E/ExoPlayerImplInternal（9697）：引起：com.google.android.exoplayer2.upstream.FileDataSource$FileDataSourceException：java.io.FileNotFoundException：[]：打开失败：ENOENT（没有这样的文件或目录） E/ExoPlayerImplInternal(9697)：在 com.google.android.exoplayer2.upstream.FileDataSource.openLocalFile(FileDataSource.java:166) E/ExoPlayerImplInternal(9697)：在 com.google.android。exoplayer2.upstream.FileDataSource.open(FileDataSource.java:89) E/ExoPlayerImplInternal(9697): ... 7 更多 E/ExoPlayerImplInternal(9697): 由: java.io.FileNotFoundException: []: 打开失败: ENOENT (没有这样的文件或目录）E/ExoPlayerImplInternal（9697）：在 libcore.io.IoBridge.open（IoBridge.java:492）E/ExoPlayerImplInternal（9697）：在 java.io.RandomAccessFile.（RandomAccessFile.java:289）E /ExoPlayerImplInternal(9697): 在 java.io.RandomAccessFile.(RandomAccessFile.java:152) E/ExoPlayerImplInternal(9697): 在 com.google.android.exoplayer2.upstream.FileDataSource.openLocalFile(FileDataSource.java:155) E/ ExoPlayerImplInternal（9697）：... 8 更多 E/ExoPlayerImplInternal（9697）：引起：android.system.ErrnoException：打开失败：ENOENT（没有这样的文件或目录）E/ExoPlayerImplInternal（9697）：在 libcore.io.Linux.open（本机方法）E/ExoPlayerImplInternal（9697）：在 libcore.io.ForwardingOs.open（ForwardingOs.java:166）E/ExoPlayerImplInternal（9697）：在 libcore.io.BlockGuardOs.open（ BlockGuardOs.java:254) E/ExoPlayerImplInternal(9697): 在 libcore.io.ForwardingOs.open(ForwardingOs.java:166) E/ExoPlayerImplInternal(9697): 在 android.app.ActivityThread$AndroidOs.open(ActivityThread.java: 7542) E/ExoPlayerImplInternal(9697): 在 libcore.io.IoBridge.open(IoBridge.java:478) E/ExoPlayerImplInternal(9697): ... 11 更多 E/ExoPlayerImplInternal(9697): 播放错误254) E/ExoPlayerImplInternal(9697): 在 libcore.io.ForwardingOs.open(ForwardingOs.java:166) E/ExoPlayerImplInternal(9697): 在 android.app.ActivityThread$AndroidOs.open(ActivityThread.java:7542) E/ ExoPlayerImplInternal(9697): 在 libcore.io.IoBridge.open(IoBridge.java:478) E/ExoPlayerImplInternal(9697): ... 11 更多 E/ExoPlayerImplInternal(9697): 播放错误254) E/ExoPlayerImplInternal(9697): 在 libcore.io.ForwardingOs.open(ForwardingOs.java:166) E/ExoPlayerImplInternal(9697): 在 android.app.ActivityThread$AndroidOs.open(ActivityThread.java:7542) E/ ExoPlayerImplInternal(9697): 在 libcore.io.IoBridge.open(IoBridge.java:478) E/ExoPlayerImplInternal(9697): ... 11 更多 E/ExoPlayerImplInternal(9697): 播放错误

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1 回答 1

0

_controller.initialize();我猜返回一个未来。您正在调用它两次：

hasInitialized = _controller.initialize();
_controller.setLooping(false);
_controller.initialize();

这就是为什么你得到：Future already completed

于 2021-05-05T19:23:53.380 回答