Question

我有一个针对SDK 28的Android应用，因此我有权处理。我检查READ_EXTERNAL_STORAGE是否已设置，但是当Exoplayer尝试读取文件（我确认确实存在）时，我会看到

com.google.android.exoplayer2.upstream.FileDataSource $ FileDataSourceException： java.io.FileNotFoundException： /storage/emulated/0/DCIM/Camera/VID_20190610_200249.mp4：打开失败： EACCES（权限被拒绝）。

我可以很好地播放资产（文件放入应用程序中）以及从Internet播放。由于某种原因，我无法播放存储在... DCIM / Camera目录中的本地视频。谁能告诉我我做错了吗？我的代码如下：

player = ExoPlayerFactory.newSimpleInstance(this, DefaultTrackSelector())
    playerView.player = player
    player?.addListener(this)

    //TODO: Change this when we are given the embedded video
    val dataSource = DefaultDataSourceFactory(this, Util.getUserAgent(this, "Exoplayer"))
    var path: String = ""
    var mediaSource: ExtractorMediaSource

    if (passedUrl == PLAY_TUTORIAL) {
        path = "asset:///tutorial_video.mp4"
        mediaSource = ExtractorMediaSource.Factory(dataSource).createMediaSource(Uri.parse(path))
    } else {
        path = passedUrl

        val file = File(path)
        val uriPath = Uri.fromFile(file)

        Timber.d("Path is $uriPath and that file exists = ${file.exists()}")


        mediaSource = ExtractorMediaSource.Factory(dataSource).createMediaSource(uriPath)
    }

    //Setting this to 0 will keep the controls from being hidden otherwise it's in milliseconds
    playerView.controllerShowTimeoutMs = 1500

    player?.prepare(mediaSource)

运行代码时，我在日志中看到了这一点：

2019-06-13 21:54:35.048 5774-5774/com.android.myapp D/ViewTutorialActivity: Path is file:///storage/emulated/0/DCIM/Camera/VID_20190610_200249.mp4 and that file exists = true

2019-06-13 21:54:35.076 5774-5846/com.android.myapp D/OpenGLRenderer: Setting buffer count to 3, min_undequeued 1, extraBuffers 0

2019-06-13 21:54:38.077 5774-5968/com.android.myapp E/ExoPlayerImplInternal: Source error.
com.google.android.exoplayer2.upstream.FileDataSource$FileDataSourceException: java.io.FileNotFoundException: /storage/emulated/0/DCIM/Camera/VID_20190610_200249.mp4: open failed: EACCES (Permission denied)
    at com.google.android.exoplayer2.upstream.FileDataSource.open(FileDataSource.java:73)

有什么主意吗？

Answer 1

好的，这是AndroidQ。通过启用旧版支持可以解决此问题。相同的代码可以在Android早期版本上完美运行。

授予权限后，EACCES（权限被拒绝）

1 个答案: