如何使用ExoPlayer播放一段时间（从网址播放）加载视频时显示进度条？

Question

我使用Exoplayer播放来自Url的视频但是当视频是缓冲区的时候，播放时只是吸球而没有任何事情发生。所以，我决定在播放状态下播放视频缓冲区时显示进度条。 那么，如何实现使用Exoplayer？

Answer 1

播放器上的活动实施

ExoPlayer.EventListener

@Override 
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) { 
    if (playbackState == ExoPlayer.STATE_BUFFERING) { 
     //show your progress dialog here 
    } 
} 

Answer 2

在布局文件

<FrameLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
<ProgressBar 
    android:id="@+id/exo_player_progress_bar" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center"/> 
</FrameLayout> 

在活动课实施ExoPlayer.EventListener并添加此

@Override 
public void onTimelineChanged(Timeline timeline, Object manifest) { 

} 

@Override 
public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) { 

} 

@Override 
public void onLoadingChanged(boolean isLoading) { 

} 

@Override 
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) { 
    if (playbackState == ExoPlayer.STATE_BUFFERING){ 
     mProgressBar.setVisibility(View.VISIBLE); 
    } else { 
     mProgressBar.setVisibility(View.INVISIBLE); 
    } 
} 

@Override 
public void onRepeatModeChanged(int repeatMode) { 

} 

@Override 
public void onShuffleModeEnabledChanged(boolean shuffleModeEnabled) { 

} 

@Override 
public void onPlayerError(ExoPlaybackException error) { 

} 

@Override 
public void onPositionDiscontinuity(int reason) { 

} 

@Override 
public void onPlaybackParametersChanged(PlaybackParameters playbackParameters) { 

} 

@Override 
public void onSeekProcessed() { 

}