android - 跟踪用户观看视频 android exoplayer 的时长

Question

我想在我的应用程序中添加这个功能，用户在 Exo Player 中观看视频多长时间了？谁能告诉我这段代码是否可能。请解决这个问题。

Answer 1

一些笔记

是的，可以很容易地追踪在 ExoPlayer 中播放的视频的运行时间。

你能做什么

对于这个例子，我使用了 kotlin 和 ExoPlayer v2.9.3

mPlayer.addListener(object : IPlayerEventListener {
          override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
               super.onPlayerStateChanged(playWhenReady, playbackState)
               if (playbackState == Player.STATE_READY) {
                    // Apply some logic here whenever you want to get the duration
                    var durationMillis = mPlayer.getDuration()

                    // Apply some logic here to send out the data to your servers (whether after video paused, resumed, stopped, your choice)
                    // Example (Assuming you use MVVM + RxJava + Retrofit, this is a common way to do network call)
                    viewModel.uploadPlaybackDetails(userId = 21, videoId = 18, playbackTime = durationMillis)
               }
          }

          override fun onPlayerError(error: ExoPlaybackException?) {
               super.onPlayerError(error)
               // Handle error here
          }
     })

最好的持续时间是监听 ExoPlayer 的状态改变，尤其是当它准备好时，否则如果你这样做

mPlayer.prepare()

// For example you attempted to get the duration immediately
mPlayer.getDuration()

您将看到带有 UNKNOWN_TIME 错误的日志。

引用资料

• https://github.com/google/ExoPlayer