java.lang.NullPointerException

[h3clikejava]

at com.google.android.exoplayer2.source.ExtractorMediaSource.notifySourceInfoRefreshed (ExtractorMediaSource.java:381)
at com.google.android.exoplayer2.source.ExtractorMediaSource.onSourceInfoRefreshed (ExtractorMediaSource.java:372)
at com.google.android.exoplayer2.source.ExtractorMediaPeriod.maybeFinishPrepare (ExtractorMediaPeriod.java:625)
at com.google.android.exoplayer2.source.ExtractorMediaPeriod.access$000 (ExtractorMediaPeriod.java:53)
at com.google.android.exoplayer2.source.ExtractorMediaPeriod$1.run (ExtractorMediaPeriod.java:157)
at android.os.Handler.handleCallback (Handler.java:873)
at android.os.Handler.dispatchMessage (Handler.java:99)
at android.os.Looper.loop (Looper.java:164)
at android.os.HandlerThread.run (HandlerThread.java:65)

bug report from Google Play Console, It's a old bug, maybe you need try catch it, don't let it crash!
BTW, I used version is 2.7.3

[botaydotcom]

I think this is probably a duplicate of #3968. In that issue (it seems it's from you as well), @ojw28 suggested that the cause for this was probably because your app was re-using MediaSource instances. This is not supported until 2.8.0. Therefore, one possible solution for you in this case is to try to upgrade your app to use ExoPlayer 2.8.0 and above.