ExoPlayer getDuration

Question

I'm trying to play mp3 file from url with ExoPlayer.

Everything is fine but now I wonder when is the time it's safe to getDuration() of the audio track. I just need it once track is loaded. Didn't find it in google's example project.

When I try to get it immediately after exoPlayer.prepare() then I get UNKNOWN_TIME.

Answer 1

Ok, looks like this is the only solution here.

We add listener to our player, and get duration when state changes to STATE_READY. It will obviously called on every play/pause action so we need to wrap it with boolean durationSet flag if check to call it once on track start. Then durationSet = false somewhere near audioPlayer.prepare()

audioPlayer.addListener(new ExoPlayer.Listener() {
        @Override
        public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
            if (playbackState == ExoPlayer.STATE_READY && !durationSet) {
                long realDurationMillis = audioPlayer.getDuration();
                durationSet = true;
            }

        }

        @Override
        public void onPlayWhenReadyCommitted() {
            // No op.
        }

        @Override
        public void onPlayerError(ExoPlaybackException error) {
            // No op.
        }
    });

Answer 2

private int getVideoDurationSeconds(SimpleExoPlayer player)
    {
        int timeMs=(int) player.getDuration();
        int totalSeconds = timeMs / 1000;
        return totalSeconds;
    }

just call this method with exoplayer object and you will find total seconds

complete method

private String stringForTime(int timeMs) {
    StringBuilder mFormatBuilder = new StringBuilder();
    Formatter mFormatter = new Formatter(mFormatBuilder, Locale.getDefault());
    int totalSeconds = timeMs / 1000;
  //  videoDurationInSeconds = totalSeconds % 60;
    int seconds = totalSeconds % 60;
    int minutes = (totalSeconds / 60) % 60;
    int hours = totalSeconds / 3600;

    mFormatBuilder.setLength(0);
    if (hours > 0) {
        return mFormatter.format("%d:%02d:%02d", hours, minutes, seconds).toString();
    } else {
        return mFormatter.format("%02d:%02d", minutes, seconds).toString();
    }
}