使用 path_provider 到 video_player 获取下载的文件路径时出错

Posted 2023-02-23

【中文标题】使用 path_provider 到 video_player 获取下载的文件路径时出错

【英文标题】：Error getting a downloaded file path with path_provider to video_player

【发布时间】：2019-08-29 00:40:22

【问题描述】：

我的应用程序将下载视频，在第一个屏幕上可以下载视频，我正在使用 dio 并使用 path_provider 获取应用程序文件夹，在第二个屏幕上我想显示并播放下载的视频。

下载正常，存储在正确的路径中，但我无法检索到 video_player 的相同路径，我收到“找不到文件”。

文件下载路径：/data/user/0/APP_NAME/app_flutter/ATW - Around the World.mp4

错误显示的路径：flutter_assets//data/user/0/APP_NAME/app_flutter/ATW - 环游世界.mp4

看起来他们不一样。

Dio dio = Dio();

      try 

        var dir = await getApplicationDocumentsDirectory();

        for (int i = 0; i < urls.length; i++)

          path = "$dir.path/$tricks[i].mp4";

          await dio.download(urls[i], path, onReceiveProgress: (rec, total)

            setState(() 

              progress = ((rec / total) * 100).toStringAsFixed(0) + "%";

            );

          );

          print(path);

        


       catch (e)
        print(e);
      

===============


import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'package:video_player/video_player.dart';

class VideoScreen extends StatefulWidget 

  String trickName;


  VideoScreen(this.trickName);

  @override
  _VideoScreenState createState() => _VideoScreenState(trickName);


class _VideoScreenState extends State<VideoScreen> 

  String trickName;
  VideoPlayerController _controller;
  dynamic videoPath;

  _VideoScreenState(this.trickName);

  @override
  void initState() 
    // TODO: implement initState
    super.initState();

    _getVideoPath();

  

  @override
  Widget build(BuildContext context) 
    return Scaffold(
      appBar: AppBar(
        title: Text("Trick"),
         centerTitle: true,
      ),
      body: FutureBuilder(
        future: _getVideoPath(),
          builder: (context, snapshot)
          if(snapshot.connectionState == ConnectionState.done)
            return Center(
              child: _controller.value.initialized ? AspectRatio(
                aspectRatio: _controller.value.aspectRatio,
                child: VideoPlayer(_controller),
              )
              : Center(
                child: CircularProgressIndicator(),
              ),
            );
            

          
      ),


    );
  

  @override
  void dispose() 
    // TODO: implement dispose
    super.dispose();
    _controller.dispose();
  

  Future<void> _getVideoPath() async

    try

      var dir = await getApplicationDocumentsDirectory();

      videoPath = "$dir.path/$trickName.mp4";

      print(videoPath);


      _controller = VideoPlayerController.asset(videoPath)..initialize()
          .then((_)
        setState(() 

        );
      );

    catch (e)
      print(e);
    

  

I/ExoPlayerImpl(20059)：初始化 5dd991d [ExoPlayerLib/2.9.6] [m253, LG-K430, LGE, 23] I/ExoPlayerImpl(20059)：初始化 8355563 [ExoPlayerLib/2.9.6] [m253，LG-K430，LGE，23] E/ExoPlayerImplInternal(20059)：源错误。 E/ExoPlayerImplInternal(20059): com.google.android.exoplayer2.upstream.AssetDataSource$AssetDataSourceException: java.io.FileNotFoundException: flutter_assets//data/user/0/APP_NAME/app_flutter/ATW - 围绕 世界.mp4 E/ExoPlayerImplInternal(20059)：在 com.google.android.exoplayer2.upstream.AssetDataSource.open(AssetDataSource.java:98) E/ExoPlayerImplInternal(20059)：在 com.google.android.exoplayer2.upstream.DefaultDataSource.open(DefaultDataSource.java:250) E/ExoPlayerImplInternal(20059)：在 com.google.android.exoplayer2.upstream.StatsDataSource.open(StatsDataSource.java:83) E/ExoPlayerImplInternal(20059)：在 com.google.android.exoplayer2.source.ExtractorMediaPeriod$ExtractingLoadable.load(ExtractorMediaPeriod.java:885) E/ExoPlayerImplInternal(20059)：在 com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:381) E/ExoPlayerImplInternal(20059)：在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) E/ExoPlayerImplInternal(20059)：在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) E/ExoPlayerImplInternal(20059)：在 java.lang.Thread.run(Thread.java:818) E/ExoPlayerImplInternal(20059)：引起：java.io.FileNotFoundException： flutter_assets//data/user/0/APP_NAME/app_flutter/ATW - 围绕 世界.mp4 E/ExoPlayerImplInternal(20059)：在 android.content.res.AssetManager.openAsset(Native Method) E/ExoPlayerImplInternal(20059)：在 android.content.res.AssetManager.open(AssetManager.java:313) E/ExoPlayerImplInternal(20059)：在 com.google.android.exoplayer2.upstream.AssetDataSource.open(AssetDataSource.java:79) E/ExoPlayerImplInternal(20059): ... 7 更多

【参考方案1】：

video_player 有一个文件功能：VideoPlayerController.file(File)

我的 Android Studio 没有显示该功能，所以我认为它没有实现。

现在我可以从 app 文件夹加载视频了。