在 Flutter 中,获取 URL 但无法在 VideoPlayer 上显示视频并出现错误
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【中文标题】在 Flutter 中,获取 URL 但无法在 VideoPlayer 上显示视频并出现错误【英文标题】:In Flutter, getting URL but not able to display video on VideoPlayer and getting Error 【发布时间】:2021-07-28 01:37:07 【问题描述】:我无法在 UI 中显示视频,但我正在获取 URL,它显示一些“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:
[ERROR:flutter/lib/ui/ui_dart_state.cc(186)] 未处理异常:错误状态:Future 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/颤动(9697): E/颤动(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):在 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): ... 还有 7 个 E / ExoPlayerImplInternal(9697):引起: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): ... 还有 8 个 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
【问题讨论】:
【参考方案1】:_controller.initialize();
我猜会返回一个 Future。
您正在调用它两次:
hasInitialized = _controller.initialize();
_controller.setLooping(false);
_controller.initialize();
这就是你得到的原因:Future already completed
【讨论】:
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