我有VideoLayout使用ExoPlayer显示视频。 VideoLayout在Fragment（代码中为previewVideoLayout和fullVideoLayout）中使用了previewVideoLayout两次。
片段默认显示为fullVideoLayout;如果用户按下“活动”中的按钮，则会在previewVideoLayout上显示previewVideoLayout并带有动画。 fullVideoLayout总是正常播放，但previewVideoLayout 不显示视频，但播放声音（在Fragment声音之上）。
有没有理由，在两个布局上调用相同的方法，一个播放但第二个不播放？如果它是相关的; ViewPager位于public class VideoLayout {
public static final int MUTE_VOLUME = 0;
public static final int MAX_VOLUME = 100;
public static final int UPDATE_INTERVAL = 30;
protected static final String ARG_VIDEO_URL = "VIDEO_URL";
private final Context context;
private String videoUrl;
private HttpProxyCacheServer proxy;
private boolean visibleForUser;
private SimpleExoPlayer player;
private SimpleExoPlayerView simpleExoPlayerView;
private boolean pendingPlay;
private ProgressBar pbLoadIndicator;
private TimerTask updateProgressTask;
private Timer timer;
private ProgressBar videoProgress;
private ViewGroup layout;
private VideoFragment.VideoPreviewCallbacks videoPreviewCallbacks;
private String tag;
private boolean isFullVideo;
public VideoLayout(Context context, String videoUrl, boolean isFullVideo) {
this.context = context;
this.isFullVideo = isFullVideo;
this.videoUrl = "http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4";
}
public void onAttach(Context context) {
if (context instanceof VideoFragment.VideoPreviewCallbacks) {
videoPreviewCallbacks = (VideoFragment.VideoPreviewCallbacks) context;
}
}
public void onCreate() {
this.videoUrl = "http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4";
initPlayer();
}
public void onCreateView(ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
layout = (ViewGroup) inflater.inflate(getLayoutRes(), null);
String tag = createTag();
if (parent.findViewWithTag(tag) == null) {
layout.setTag(tag);
parent.addView(layout, parent.getChildCount());
}
}
public void onViewCreated(View view) {
bindViews(view);
setupPlayerView();
}
public void onResume() {
if (pendingPlay && visibleForUser) {
pendingPlay = false;
startPlayer();
}
}
public void onPause() {
pausePlayer();
}
public void onDestroy() {
player.release();
}
public void setUserVisibleHint(boolean isVisibleToUser) {
visibleForUser = isVisibleToUser;
if (layout != null) {
layout.setVisibility(isVisibleToUser ? VISIBLE : GONE);
}
if (visibleForUser && simpleExoPlayerView != null) {
startPlayer();
} else if (!visibleForUser && simpleExoPlayerView != null) {
pausePlayer();
} else if (visibleForUser) {
pendingPlay = true;
}
}
private void bindViews(View view) {
simpleExoPlayerView = (SimpleExoPlayerView) view.findViewById(R.id.simpleExoPlayerView);
simpleExoPlayerView.setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.white));
pbLoadIndicator = (ProgressBar) view.findViewById(R.id.pbLoadIndicator);
videoProgress = (ProgressBar) view.findViewById(R.id.progress_video);
}
private void setupPlayerView() {
simpleExoPlayerView.setUseController(false);
simpleExoPlayerView.setPlayer(player);
}
private void initPlayer() {
if (player == null) {
initProxy();
DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
final LoopingMediaSource loopingSource = getVideoPlayerMediaSource(bandwidthMeter);
TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveVideoTrackSelection.Factory(bandwidthMeter);
TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
LoadControl loadControl = new DefaultLoadControl();
player = ExoPlayerFactory.newSimpleInstance(getContext(), trackSelector, loadControl);
player.addListener(new PlayerEventListener() {
@Override
public void onLoadingChanged(boolean isLoading) {
if (pbLoadIndicator != null)
pbLoadIndicator.setVisibility(isLoading ? View.VISIBLE : View.GONE);
}
@Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
if (pbLoadIndicator != null)
pbLoadIndicator.setVisibility(playWhenReady ? View.GONE : View.VISIBLE);
}
});
player.prepare(loopingSource);
player.setVideoScalingMode(C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);
}
}
private void initProxy() {
proxy = VideoCache.getProxy(getContext());
}
@NonNull
private LoopingMediaSource getVideoPlayerMediaSource(DefaultBandwidthMeter bandwidthMeter) {
DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(getContext(),
Util.getUserAgent(getContext(), "lifive.buy"), bandwidthMeter);
ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
Uri url = Uri.parse(videoUrl);
MediaSource videoSource;
if (videoUrl.contains(".mp4")) {
url = Uri.parse(proxy.getProxyUrl(videoUrl));
videoSource = new ExtractorMediaSource(url,
dataSourceFactory, extractorsFactory, null, null);
} else {
videoSource = new HlsMediaSource(url, dataSourceFactory, null, null);
}
return new LoopingMediaSource(videoSource);
}
public void enableProgress(boolean enable) {
videoProgress.setVisibility(enable ? VISIBLE : View.GONE);
}
private void startPlayer() {
player.setPlayWhenReady(true);
createUpdateTimer();
}
/**
* creates the timer that updates the progress bar
*/
private void createUpdateTimer() {
cancelUpdateTimer();
updateProgressTask = new TimerTask() {
@Override
public void run() {
if (player != null) {
notifyUpdate();
}
}
};
timer = new Timer();
timer.scheduleAtFixedRate(updateProgressTask, 0, UPDATE_INTERVAL);
}
/**
* cancels the timer that updates the progress bar
*/
private void cancelUpdateTimer() {
if (timer != null) {
timer.cancel();
}
}
/**
* notifies that the UI should be updated. See createUpdateTimer
*/
private void notifyUpdate() {
new Handler(Looper.getMainLooper()).post(() -> {
updateProgressBar();
if (player.getDuration() > 0 && videoPreviewCallbacks != null) {
videoPreviewCallbacks.onProgress(player.getCurrentPosition(), player.getDuration());
}
});
}
private void updateProgressBar() {
videoProgress.setMax((int) player.getDuration());
videoProgress.setProgress((int) player.getCurrentPosition());
}
private void pausePlayer() {
pendingPlay = true;
player.setPlayWhenReady(false);
player.seekTo(1);
cancelUpdateTimer();
}
public int getVisibility() {
return layout == null ? GONE : layout.getVisibility();
}
public void muteSound(boolean on) {
player.setVolume(on ? MUTE_VOLUME : MAX_VOLUME);
}
private int getLayoutRes() {
return isFullVideo ? R.layout.layout_full_video_player : R.layout.layout_video_player;
}
private String createTag() {
if (this.tag == null)
this.tag = "VideoLayout" + hashCode();
return this.tag;
}
private Context getContext() {
return context.getApplicationContext();
}
内。
VideLayout：
public class VideoFragment extends Fragment {
protected static final String ARG_VIDEO_URL = "VIDEO_URL";
private static final String ARG_FULL_VIDEO_URL = "FULL_VIDEO_URL";
private VideoLayout previewVideoLayout;
private VideoLayout fullVideoLayout;
private String videoUrl;
private String fullVideoUrl;
private ViewGroup parent;
public VideoFragment() {
}
/**
* @param videoUrl video url
* @return A new instance of fragment VideoPreviewFragment.
*/
public static VideoFragment newInstance(String videoUrl, String fullVideoUrl) {
VideoFragment fragment = new VideoFragment();
Bundle args = new Bundle();
args.putString(ARG_VIDEO_URL, videoUrl);
args.putString(ARG_FULL_VIDEO_URL, fullVideoUrl);
fragment.setArguments(args);
return fragment;
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof VideoPreviewCallbacks) {
if (getCurrentLayout() != null)
getCurrentLayout().onAttach(getContext());
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
videoUrl = getArguments().getString(ARG_VIDEO_URL);
fullVideoUrl = getArguments().getString(ARG_FULL_VIDEO_URL);
if (previewVideoLayout == null) {
previewVideoLayout = new VideoLayout(getContext(), videoUrl, false);
previewVideoLayout.setUserVisibleHint(getUserVisibleHint());
previewVideoLayout.onCreate();
}
if (fullVideoLayout == null && fullVideoUrl != null) {
}
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View inflate = inflater.inflate(R.layout.fragment_video_preview, container, false);
parent = (ViewGroup) inflate.findViewById(R.id.fragment_video_preview_root);
previewVideoLayout.onCreateView(parent);
return inflate;
}
@Override
public void onViewCreated(View view, Bundle savedInstance) {
super.onViewCreated(view, savedInstance);
previewVideoLayout.onViewCreated(view);
}
@Override
public void onResume() {
super.onResume();
if (previewVideoLayout != null)
previewVideoLayout.onResume();
if (fullVideoLayout != null)
fullVideoLayout.onResume();
}
@Override
public void onPause() {
super.onPause();
if (previewVideoLayout != null)
previewVideoLayout.onPause();
if (fullVideoLayout != null)
fullVideoLayout.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
if (previewVideoLayout != null)
previewVideoLayout.onDestroy();
if (fullVideoLayout != null)
fullVideoLayout.onDestroy();
}
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (previewVideoLayout != null)
previewVideoLayout.setUserVisibleHint(isVisibleToUser);
if (fullVideoLayout != null)
fullVideoLayout.setUserVisibleHint(isVisibleToUser);
}
public void enableProgress(boolean enable) {
if (previewVideoLayout != null)
previewVideoLayout.enableProgress(enable);
if (fullVideoLayout != null)
fullVideoLayout.enableProgress(enable);
}
private VideoLayout getCurrentLayout() {
if (fullVideoLayout != null)
return fullVideoLayout.getVisibility() == View.VISIBLE ? fullVideoLayout : previewVideoLayout;
return previewVideoLayout;
}
public void muteSound(boolean on) {
if(previewVideoLayout!=null)
previewVideoLayout.muteSound(on);
if(fullVideoLayout!=null)
fullVideoLayout.muteSound(on);
}
public void showFullVideo() {
fullVideoLayout = new VideoLayout(getContext(), fullVideoUrl, true);
fullVideoLayout.setUserVisibleHint(getUserVisibleHint());
fullVideoLayout.onCreate();
fullVideoLayout.onCreateView(parent);
fullVideoLayout.onViewCreated(getView());
fullVideoLayout.onResume();
}
public interface VideoPreviewCallbacks {
void onProgress(long currentMillis, long durationInMillis);
}
片段：
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