本文整理了Java中com.google.android.exoplayer2.Timeline.isEmpty()方法的一些代码示例，展示了Timeline.isEmpty()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Timeline.isEmpty()方法的具体详情如下：
包路径：com.google.android.exoplayer2.Timeline
类名称：Timeline
方法名：isEmpty

Timeline.isEmpty介绍

[英]Returns whether the timeline is empty.
[中]返回时间线是否为空。

代码示例

代码示例来源：origin: google/ExoPlayer

/**
 * Returns the index of the first window in the playback order depending on whether shuffling is
 * enabled.
 *
 * @param shuffleModeEnabled Whether shuffling is enabled.
 * @return The index of the first window in the playback order, or {@link C#INDEX_UNSET} if the
 *     timeline is empty.
 */
public int getFirstWindowIndex(boolean shuffleModeEnabled) {
 return isEmpty() ? C.INDEX_UNSET : 0;
}

代码示例来源：origin: google/ExoPlayer

private boolean shouldMaskPosition() {
 return playbackInfo.timeline.isEmpty() || pendingOperationAcks > 0;
}

代码示例来源：origin: google/ExoPlayer

/**
 * Returns the {@link MediaPeriodInfo} of the media period in the front of the queue. This is
 * the playing media period unless the player hasn't started playing yet (in which case it is
 * the loading media period or null). While the player is seeking or preparing, this method will
 * always return null to reflect the uncertainty about the current playing period. May also be
 * null, if the timeline is empty or no media period is active yet.
 */
public @Nullable MediaPeriodInfo getPlayingMediaPeriod() {
 return mediaPeriodInfoQueue.isEmpty() || timeline.isEmpty() || isSeeking
   ? null
   : mediaPeriodInfoQueue.get(0);
}

代码示例来源：origin: google/ExoPlayer

/**
 * Returns the index of the last window in the playback order depending on whether shuffling is
 * enabled.
 *
 * @param shuffleModeEnabled Whether shuffling is enabled.
 * @return The index of the last window in the playback order, or {@link C#INDEX_UNSET} if the
 *     timeline is empty.
 */
public int getLastWindowIndex(boolean shuffleModeEnabled) {
 return isEmpty() ? C.INDEX_UNSET : getWindowCount() - 1;
}

代码示例来源：origin: google/ExoPlayer

@Override
public void onTimelineChanged(
  Timeline timeline, @Nullable Object manifest, @TimelineChangeReason int reason) {
 updateCurrentItemIndex();
 if (timeline.isEmpty()) {
  castMediaQueueCreationPending = true;
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
@Nullable
public Object getTag() {
 boolean hasTimeline = timeline != null && !timeline.isEmpty();
 return hasTimeline ? timeline.getWindow(0, new Timeline.Window()).tag : null;
}

代码示例来源：origin: google/ExoPlayer

/** Updates the queue with a newly created media period. */
public void onMediaPeriodCreated(int windowIndex, MediaPeriodId mediaPeriodId) {
 boolean isInTimeline = timeline.getIndexOfPeriod(mediaPeriodId.periodUid) != C.INDEX_UNSET;
 MediaPeriodInfo mediaPeriodInfo =
   new MediaPeriodInfo(mediaPeriodId, isInTimeline ? timeline : Timeline.EMPTY, windowIndex);
 mediaPeriodInfoQueue.add(mediaPeriodInfo);
 mediaPeriodIdToInfo.put(mediaPeriodId, mediaPeriodInfo);
 if (mediaPeriodInfoQueue.size() == 1 && !timeline.isEmpty()) {
  updateLastReportedPlayingMediaPeriod();
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
public long getSupportedPlaybackActions(Player player) {
 if (player == null || player.getCurrentTimeline().isEmpty()) {
  return 0;
 } else if (!player.isCurrentWindowSeekable()) {
  return BASE_ACTIONS;
 }
 long actions = BASE_ACTIONS | PlaybackStateCompat.ACTION_SEEK_TO;
 if (fastForwardIncrementMs > 0) {
  actions |= PlaybackStateCompat.ACTION_FAST_FORWARD;
 }
 if (rewindIncrementMs > 0) {
  actions |= PlaybackStateCompat.ACTION_REWIND;
 }
 return actions;
}

代码示例来源：origin: google/ExoPlayer

@Override
public final boolean isCurrentWindowDynamic() {
 Timeline timeline = getCurrentTimeline();
 return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isDynamic;
}

代码示例来源：origin: google/ExoPlayer

@Override
public void onTimelineChanged(Timeline timeline, @Nullable Object manifest, int reason) {
 if (timeline.isEmpty()) {
  playerReference.get().setPlayWhenReady(/* playWhenReady= */ false);
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
public final boolean isCurrentWindowSeekable() {
 Timeline timeline = getCurrentTimeline();
 return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isSeekable;
}

代码示例来源：origin: google/ExoPlayer

@Override
public void onSkipToQueueItem(Player player, long id) {
 Timeline timeline = player.getCurrentTimeline();
 if (timeline.isEmpty() || player.isPlayingAd()) {
  return;
 }
 int windowIndex = (int) id;
 if (0 <= windowIndex && windowIndex < timeline.getWindowCount()) {
  player.seekTo(windowIndex, C.TIME_UNSET);
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
public final long getContentDuration() {
 Timeline timeline = getCurrentTimeline();
 return timeline.isEmpty()
   ? C.TIME_UNSET
   : timeline.getWindow(getCurrentWindowIndex(), window).getDurationMs();
}

代码示例来源：origin: google/ExoPlayer

@Override
@Nullable
public Object getTag() {
 boolean hasTimeline = timeline != null && !timeline.isEmpty();
 return hasTimeline ? timeline.getWindow(0, new Timeline.Window()).tag : null;
}

代码示例来源：origin: google/ExoPlayer

@Override
public final void onCurrentWindowIndexChanged(Player player) {
 if (activeQueueItemId == MediaSessionCompat.QueueItem.UNKNOWN_ID
   || player.getCurrentTimeline().getWindowCount() > maxQueueSize) {
  publishFloatingQueueWindow(player);
 } else if (!player.getCurrentTimeline().isEmpty()) {
  activeQueueItemId = player.getCurrentWindowIndex();
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
public final int getNextWindowIndex() {
 Timeline timeline = getCurrentTimeline();
 return timeline.isEmpty()
   ? C.INDEX_UNSET
   : timeline.getNextWindowIndex(
     getCurrentWindowIndex(), getRepeatModeForNavigation(), getShuffleModeEnabled());
}

代码示例来源：origin: google/ExoPlayer

@Override
public final int getPreviousWindowIndex() {
 Timeline timeline = getCurrentTimeline();
 return timeline.isEmpty()
   ? C.INDEX_UNSET
   : timeline.getPreviousWindowIndex(
     getCurrentWindowIndex(), getRepeatModeForNavigation(), getShuffleModeEnabled());
}

代码示例来源：origin: google/ExoPlayer

private void next() {
 Timeline timeline = player.getCurrentTimeline();
 if (timeline.isEmpty() || player.isPlayingAd()) {
  return;
 }
 int windowIndex = player.getCurrentWindowIndex();
 int nextWindowIndex = player.getNextWindowIndex();
 if (nextWindowIndex != C.INDEX_UNSET) {
  seekTo(nextWindowIndex, C.TIME_UNSET);
 } else if (timeline.getWindow(windowIndex, window).isDynamic) {
  seekTo(windowIndex, C.TIME_UNSET);
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
public void onSkipToNext(Player player) {
 Timeline timeline = player.getCurrentTimeline();
 if (timeline.isEmpty() || player.isPlayingAd()) {
  return;
 }
 int windowIndex = player.getCurrentWindowIndex();
 int nextWindowIndex = player.getNextWindowIndex();
 if (nextWindowIndex != C.INDEX_UNSET) {
  player.seekTo(nextWindowIndex, C.TIME_UNSET);
 } else if (timeline.getWindow(windowIndex, window).isDynamic) {
  player.seekTo(windowIndex, C.TIME_UNSET);
 }
}

代码示例来源：origin: google/ExoPlayer

@Override
public long getDuration() {
 if (timeline.isEmpty()) {
  return C.INDEX_UNSET;
 }
 if (isPlayingAd()) {
  long adDurationUs =
    timeline.getPeriod(0, period).getAdDurationUs(adGroupIndex, adIndexInAdGroup);
  return C.usToMs(adDurationUs);
 } else {
  return timeline.getWindow(getCurrentWindowIndex(), window).getDurationMs();
 }
}