为了播放m3u8链接，我需要对以下代码进行哪些更改？
我可以正常播放MP4视频，但HLS无法播放。要使HLS链接正常工作，我需要做什么？
我想实现这样的功能，允许播放不同的媒体源。 https://gist.github.com/navi25/7ab41931eb52bbcb693b5599e6955245#file-mediasourcebuilder-kt
public class VideoPlayerRecyclerView extends RecyclerView {
private static final String TAG = "VideoPlayerRecyclerView";
private enum VolumeState {ON, OFF};
// ui
private ImageView thumbnail, volumeControl;
private ProgressBar progressBar;
private View viewHolderParent;
private FrameLayout frameLayout;
private PlayerView videoSurfaceView;
private SimpleExoPlayer videoPlayer;
// vars
private ArrayList<MediaObject> mediaObjects = new ArrayList<>();
private int videoSurfaceDefaultHeight = 0;
private int screenDefaultHeight = 0;
private Context context;
private int playPosition = -1;
private boolean isVideoViewAdded;
private RequestManager requestManager;
// controlling playback state
private VolumeState volumeState;
public VideoPlayerRecyclerView(@NonNull Context context) {
super(context);
init(context);
}
public VideoPlayerRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init(context);
}
private void init(Context context){
this.context = context.getApplicationContext();
Display display = ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
Point point = new Point();
display.getSize(point);
videoSurfaceDefaultHeight = point.x;
screenDefaultHeight = point.y;
videoSurfaceView = new PlayerView(this.context);
videoSurfaceView.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_ZOOM);
BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
TrackSelection.Factory videoTrackSelectionFactory =
new AdaptiveTrackSelection.Factory(bandwidthMeter);
TrackSelector trackSelector =
new DefaultTrackSelector(videoTrackSelectionFactory);
// 2. Create the player
videoPlayer = ExoPlayerFactory.newSimpleInstance(context, trackSelector);
// Bind the player to the view.
videoSurfaceView.setUseController(false);
videoSurfaceView.setPlayer(videoPlayer);
setVolumeControl(VolumeState.ON);
addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (newState == RecyclerView.SCROLL_STATE_IDLE) {
Log.d(TAG, "onScrollStateChanged: called.");
if(thumbnail != null){ // show the old thumbnail
thumbnail.setVisibility(VISIBLE);
}
// There's a special case when the end of the list has been reached.
// Need to handle that with this bit of logic
if(!recyclerView.canScrollVertically(1)){
playVideo(true);
}
else{
playVideo(false);
}
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
}
});
addOnChildAttachStateChangeListener(new OnChildAttachStateChangeListener() {
@Override
public void onChildViewAttachedToWindow(View view) {
}
@Override
public void onChildViewDetachedFromWindow(View view) {
if (viewHolderParent != null && viewHolderParent.equals(view)) {
resetVideoView();
}
}
});
videoPlayer.addListener(new Player.EventListener() {
@Override
public void onTimelineChanged(Timeline timeline, @Nullable Object manifest, int reason) {
}
@Override
public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
}
@Override
public void onLoadingChanged(boolean isLoading) {
}
@Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
switch (playbackState) {
case Player.STATE_BUFFERING:
Log.e(TAG, "onPlayerStateChanged: Buffering video.");
if (progressBar != null) {
progressBar.setVisibility(VISIBLE);
}
break;
case Player.STATE_ENDED:
Log.d(TAG, "onPlayerStateChanged: Video ended.");
videoPlayer.seekTo(0);
break;
case Player.STATE_IDLE:
break;
case Player.STATE_READY:
Log.e(TAG, "onPlayerStateChanged: Ready to play.");
if (progressBar != null) {
progressBar.setVisibility(GONE);
}
if(!isVideoViewAdded){
addVideoView();
}
break;
default:
break;
}
}
@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() {
}
});
}
public void playVideo(boolean isEndOfList) {
int targetPosition;
if(!isEndOfList){
int startPosition = ((LinearLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();
int endPosition = ((LinearLayoutManager) getLayoutManager()).findLastVisibleItemPosition();
// if there is more than 2 list-items on the screen, set the difference to be 1
if (endPosition - startPosition > 1) {
endPosition = startPosition + 1;
}
// something is wrong. return.
if (startPosition < 0 || endPosition < 0) {
return;
}
// if there is more than 1 list-item on the screen
if (startPosition != endPosition) {
int startPositionVideoHeight = getVisibleVideoSurfaceHeight(startPosition);
int endPositionVideoHeight = getVisibleVideoSurfaceHeight(endPosition);
targetPosition = startPositionVideoHeight > endPositionVideoHeight ? startPosition : endPosition;
}
else {
targetPosition = startPosition;
}
}
else{
targetPosition = mediaObjects.size() - 1;
}
Log.d(TAG, "playVideo: target position: " + targetPosition);
// video is already playing so return
if (targetPosition == playPosition) {
return;
}
// set the position of the list-item that is to be played
playPosition = targetPosition;
if (videoSurfaceView == null) {
return;
}
// remove any old surface views from previously playing videos
videoSurfaceView.setVisibility(INVISIBLE);
removeVideoView(videoSurfaceView);
int currentPosition = targetPosition - ((LinearLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();
View child = getChildAt(currentPosition);
if (child == null) {
return;
}
VideoPlayerViewHolder holder = (VideoPlayerViewHolder) child.getTag();
if (holder == null) {
playPosition = -1;
return;
}
thumbnail = holder.thumbnail;
progressBar = holder.progressBar;
volumeControl = holder.volumeControl;
viewHolderParent = holder.itemView;
requestManager = holder.requestManager;
frameLayout = holder.itemView.findViewById(R.id.media_container);
videoSurfaceView.setPlayer(videoPlayer);
viewHolderParent.setOnClickListener(videoViewClickListener);
DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(
context, Util.getUserAgent(context, "RecyclerView VideoPlayer"));
String mediaUrl = mediaObjects.get(targetPosition).getMedia_url();
if (mediaUrl != null) {
MediaSource videoSource = new ExtractorMediaSource.Factory(dataSourceFactory)
.createMediaSource(Uri.parse(mediaUrl));
videoPlayer.prepare(videoSource);
videoPlayer.setPlayWhenReady(true);
}
}
private OnClickListener videoViewClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
toggleVolume();
}
};
/**
* Returns the visible region of the video surface on the screen.
* if some is cut off, it will return less than the @videoSurfaceDefaultHeight
* @param playPosition
* @return
*/
private int getVisibleVideoSurfaceHeight(int playPosition) {
int at = playPosition - ((LinearLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();
Log.d(TAG, "getVisibleVideoSurfaceHeight: at: " + at);
View child = getChildAt(at);
if (child == null) {
return 0;
}
int[] location = new int[2];
child.getLocationInWindow(location);
if (location[1] < 0) {
return location[1] + videoSurfaceDefaultHeight;
} else {
return screenDefaultHeight - location[1];
}
}
// Remove the old player
private void removeVideoView(PlayerView videoView) {
ViewGroup parent = (ViewGroup) videoView.getParent();
if (parent == null) {
return;
}
int index = parent.indexOfChild(videoView);
if (index >= 0) {
parent.removeViewAt(index);
isVideoViewAdded = false;
viewHolderParent.setOnClickListener(null);
}
}
private void addVideoView(){
frameLayout.addView(videoSurfaceView);
isVideoViewAdded = true;
videoSurfaceView.requestFocus();
videoSurfaceView.setVisibility(VISIBLE);
videoSurfaceView.setAlpha(1);
thumbnail.setVisibility(GONE);
}
private void resetVideoView(){
if(isVideoViewAdded){
removeVideoView(videoSurfaceView);
playPosition = -1;
videoSurfaceView.setVisibility(INVISIBLE);
thumbnail.setVisibility(VISIBLE);
}
}
public void releasePlayer() {
if (videoPlayer != null) {
videoPlayer.release();
videoPlayer = null;
}
viewHolderParent = null;
}
private void toggleVolume() {
if (videoPlayer != null) {
if (volumeState == VolumeState.OFF) {
Log.d(TAG, "togglePlaybackState: enabling volume.");
setVolumeControl(VolumeState.ON);
} else if(volumeState == VolumeState.ON) {
Log.d(TAG, "togglePlaybackState: disabling volume.");
setVolumeControl(VolumeState.OFF);
}
}
}
private void setVolumeControl(VolumeState state){
volumeState = state;
if(state == VolumeState.OFF){
videoPlayer.setVolume(0f);
animateVolumeControl();
}
else if(state == VolumeState.ON){
videoPlayer.setVolume(1f);
animateVolumeControl();
}
}
private void animateVolumeControl(){
if(volumeControl != null){
volumeControl.bringToFront();
if(volumeState == VolumeState.OFF){
requestManager.load(R.drawable.ic_volume_off_grey_24dp)
.into(volumeControl);
}
else if(volumeState == VolumeState.ON){
requestManager.load(R.drawable.ic_volume_up_grey_24dp)
.into(volumeControl);
}
volumeControl.animate().cancel();
volumeControl.setAlpha(1f);
volumeControl.animate()
.alpha(0f)
.setDuration(600).setStartDelay(1000);
}
}
public void setMediaObjects(ArrayList<MediaObject> mediaObjects){
this.mediaObjects = mediaObjects;
}
}
对于HLS，您需要使用HlsMediaSource而不是默认的MediaSource。