我已经使用android exoplayer制作了视频播放器，以便在使用ima扩展名的视频上展示广告。但是我遇到了一个问题，该广告无法自动显示其倒计时。要使视频播放器显示广告的倒数，我必须播放视频并旋转屏幕。
广告无法自动显示广告的倒计时：
播放视频并旋转后，广告的倒数出现：
这是我的ExoPlayerView：
package com.brentvatne.exoplayer;
import android.annotation.Targetapi;
import android.content.Context;
import androidx.core.content.ContextCompat;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.SurfaceView;
import android.view.TextureView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.ExoPlaybackException;
import com.google.android.exoplayer2.ExoPlayer;
import com.google.android.exoplayer2.PlaybackParameters;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.Timeline;
import com.google.android.exoplayer2.source.ads.AdsLoader;
import com.google.android.exoplayer2.source.TrackGroupArray;
import com.google.android.exoplayer2.text.Cue;
import com.google.android.exoplayer2.text.TextRenderer;
import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
import com.google.android.exoplayer2.ui.SubtitleView;
import com.google.android.exoplayer2.util.Assertions;
import java.util.List;
import java.util.ArrayList;
@Targetapi(16)
public final class ExoPlayerView extends FrameLayout implements AdsLoader.AdViewProvider {
private View surfaceView;
private final View shutterView;
private final SubtitleView subtitleLayout;
private final AspectRatioFrameLayout layout;
private final ComponentListener componentListener;
private SimpleExoPlayer player;
private Context context;
private ViewGroup.LayoutParams layoutParams;
private final FrameLayout adOverlayFrameLayout;
private boolean useTextureView = true;
private boolean hideShutterView = false;
public ExoPlayerView(Context context) {
this(context,null);
}
public ExoPlayerView(Context context,AttributeSet attrs) {
this(context,attrs,0);
}
public ExoPlayerView(Context context,AttributeSet attrs,int defStyleAttr) {
super(context,defStyleAttr);
this.context = context;
layoutParams = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT);
componentListener = new ComponentListener();
FrameLayout.LayoutParams aspectRatioParams = new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT,FrameLayout.LayoutParams.MATCH_PARENT);
aspectRatioParams.gravity = Gravity.CENTER;
layout = new AspectRatioFrameLayout(context);
layout.setLayoutParams(aspectRatioParams);
shutterView = new View(getcontext());
shutterView.setLayoutParams(layoutParams);
shutterView.setBackgroundColor(ContextCompat.getcolor(context,android.R.color.black));
subtitleLayout = new SubtitleView(context);
subtitleLayout.setLayoutParams(layoutParams);
subtitleLayout.setUserDefaultStyle();
subtitleLayout.setUserDefaultTextSize();
adOverlayFrameLayout = new FrameLayout(context);
adOverlayFrameLayout.setLayoutParams(layoutParams);
updateSurfaceView();
layout.addView(shutterView,1,layoutParams);
layout.addView(subtitleLayout,2,layoutParams);
layout.addView(adOverlayFrameLayout,3,layoutParams);
addViewinlayout(layout,aspectRatioParams);
}
private void setVideoView() {
if (surfaceView instanceof TextureView) {
player.setVideoTextureView((TextureView) surfaceView);
} else if (surfaceView instanceof SurfaceView) {
player.setVideoSurfaceView((SurfaceView) surfaceView);
}
}
private void updateSurfaceView() {
View view = useTextureView ? new TextureView(context) : new SurfaceView(context);
view.setLayoutParams(layoutParams);
surfaceView = view;
if (layout.getchildAt(0) != null) {
layout.removeViewAt(0);
}
layout.addView(surfaceView,layoutParams);
if (this.player != null) {
setVideoView();
}
}
private void updateShutterViewVisibility() {
shutterView.setVisibility(this.hideShutterView ? View.INVISIBLE : View.VISIBLE);
}
// AdsLoader.AdViewProvider implementation.
@Override
public ViewGroup getadViewGroup() {
return Assertions.checkNotNull(adOverlayFrameLayout,"exo_ad_overlay must be present for ad playback");
}
@Override
public View[] getadOverlayViews() {
ArrayList<View> overlayViews = new ArrayList<>();
if (adOverlayFrameLayout != null) {
overlayViews.add(adOverlayFrameLayout);
}
return overlayViews.toArray(new View[0]);
}
/**
* Set the {@link SimpleExoPlayer} to use. The {@link SimpleExoPlayer#setTextOutput} and
* {@link SimpleExoPlayer#setVideoListener} method of the player will be called and previous
* assignments are overridden.
*
* @param player The {@link SimpleExoPlayer} to use.
*/
public void setPlayer(SimpleExoPlayer player) {
if (this.player == player) {
return;
}
if (this.player != null) {
this.player.setTextOutput(null);
this.player.setVideoListener(null);
this.player.removeListener(componentListener);
this.player.setVideoSurface(null);
}
this.player = player;
shutterView.setVisibility(VISIBLE);
if (player != null) {
setVideoView();
player.setVideoListener(componentListener);
player.addListener(componentListener);
player.setTextOutput(componentListener);
}
}
/**
* Sets the resize mode which can be of value {@link ResizeMode.Mode}
*
* @param resizeMode The resize mode.
*/
public void setResizeMode(@ResizeMode.Mode int resizeMode) {
if (layout.getResizeMode() != resizeMode) {
layout.setResizeMode(resizeMode);
post(measureAndLayout);
}
}
/**
* Get the view onto which video is rendered. This is either a {@link SurfaceView} (default)
* or a {@link TextureView} if the {@code use_texture_view} view attribute has been set to true.
*
* @return either a {@link SurfaceView} or a {@link TextureView}.
*/
public View getVideoSurfaceView() {
return surfaceView;
}
public void setUseTextureView(boolean useTextureView) {
if (useTextureView != this.useTextureView) {
this.useTextureView = useTextureView;
updateSurfaceView();
}
}
public void setHideShutterView(boolean hideShutterView) {
this.hideShutterView = hideShutterView;
updateShutterViewVisibility();
}
private final Runnable measureAndLayout = new Runnable() {
@Override
public void run() {
measure(
MeasureSpec.makeMeasureSpec(getWidth(),MeasureSpec.ExactLY),MeasureSpec.makeMeasureSpec(getHeight(),MeasureSpec.ExactLY));
layout(getLeft(),getTop(),getRight(),getBottom());
}
};
private void updateForCurrentTrackSelections() {
if (player == null) {
return;
}
TrackSelectionArray selections = player.getcurrentTrackSelections();
for (int i = 0; i < selections.length; i++) {
if (player.getRendererType(i) == C.TRACK_TYPE_VIDEO && selections.get(i) != null) {
// Video enabled so artwork must be hidden. If the shutter is closed,it will be opened in
// onRenderedFirstFrame().
return;
}
}
// Video disabled so the shutter must be closed.
shutterView.setVisibility(VISIBLE);
}
private final class ComponentListener implements SimpleExoPlayer.VideoListener,TextRenderer.Output,ExoPlayer.EventListener {
// TextRenderer.Output implementation
@Override
public void onCues(List<Cue> cues) {
subtitleLayout.onCues(cues);
}
// SimpleExoPlayer.VideoListener implementation
@Override
public void onVideoSizeChanged(int width,int height,int unappliedRotationDegrees,float pixelWidthHeightRatio) {
boolean isInitialRatio = layout.getaspectRatio() == 0;
layout.setaspectRatio(height == 0 ? 1 : (width * pixelWidthHeightRatio) / height);
// React native workaround for measuring and layout on initial load.
if (isInitialRatio) {
post(measureAndLayout);
}
}
@Override
public void onRenderedFirstFrame() {
shutterView.setVisibility(INVISIBLE);
}
// ExoPlayer.EventListener implementation
@Override
public void onLoadingChanged(boolean isLoading) {
// Do nothing.
}
@Override
public void onPlayerStateChanged(boolean playWhenReady,int playbackState) {
// Do nothing.
}
@Override
public void onPlayerError(ExoPlaybackException e) {
// Do nothing.
}
@Override
public void onPositionDiscontinuity(int reason) {
// Do nothing.
}
@Override
public void onTimelineChanged(Timeline timeline,Object manifest,int reason) {
// Do nothing.
}
@Override
public void onTracksChanged(TrackGroupArray trackGroups,TrackSelectionArray trackSelections) {
updateForCurrentTrackSelections();
}
@Override
public void onPlaybackParametersChanged(PlaybackParameters params) {
// Do nothing
}
@Override
public void onSeekProcessed() {
// Do nothing.
}
@Override
public void onShuffleModeEnabledChanged(boolean shuffleModeEnabled) {
// Do nothing.
}
@Override
public void onRepeatModeChanged(int repeatMode) {
// Do nothing.
}
}
}
这是初始化播放器方法：
private void initializePlayer() {
ReactExoplayerView self = this;
// This ensures all props have been settled,to avoid async racing conditions.
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
if (player == null) {
TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory();
trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
trackSelector.setParameters(trackSelector.buildUponParameters()
.setMaxVideoBitrate(maxBitRate == 0 ? Integer.MAX_VALUE : maxBitRate));
DefaultAllocator allocator = new DefaultAllocator(true,C.DEFAULT_BUFFER_SEGMENT_SIZE);
DefaultLoadControl.Builder defaultLoadControlBuilder = new DefaultLoadControl.Builder();
defaultLoadControlBuilder.setallocator(allocator);
defaultLoadControlBuilder.setBufferDurationsMs(minBufferMs,maxBufferMs,bufferForPlaybackMs,bufferForPlaybackAfterRebufferMs);
defaultLoadControlBuilder.setTargetBufferBytes(-1);
defaultLoadControlBuilder.setPrioritizeTimeOverSizeThresholds(true);
DefaultLoadControl defaultLoadControl = defaultLoadControlBuilder.createDefaultLoadControl();
DefaultRenderersFactory renderersFactory =
new DefaultRenderersFactory(getcontext())
.setExtensionRendererMode(DefaultRenderersFactory.EXTENSION_RENDERER_MODE_OFF);
// TODO: Add drmSessionmanager to 5th param from: https://github.com/react-native-community/react-native-video/pull/1445
player = ExoPlayerFactory.newSimpleInstance(getcontext(),renderersFactory,trackSelector,defaultLoadControl,null,bandwidthMeter);
player.addListener(self);
player.addMetadataOutput(self);
adsLoader.setPlayer(player);
exoPlayerView.setPlayer(player);
audioBecomingNoisyReceiver.setListener(self);
bandwidthMeter.addEventListener(new Handler(),self);
setPlayWhenReady(!isPaused);
playerNeedsSource = true;
PlaybackParameters params = new PlaybackParameters(rate,1f);
player.setPlaybackParameters(params);
}
if (playerNeedsSource && srcUri != null) {
ArrayList<MediaSource> mediaSourceList = buildTextsources();
MediaSource videoSource = buildMediaSource(srcUri,extension);
MediaSource mediaSourceWithAds = new AdsMediaSource(videoSource,mediaDataSourceFactory,adsLoader,exoPlayerView);
MediaSource mediaSource;
if (mediaSourceList.size() == 0) {
mediaSource = mediaSourceWithAds;
} else {
mediaSourceList.add(0,mediaSourceWithAds);
MediaSource[] textsourceArray = mediaSourceList.toArray(
new MediaSource[mediaSourceList.size()]
);
mediaSource = new MergingMediaSource(textsourceArray);
}
boolean haveResumePosition = resumeWindow != C.INDEX_UNSET;
if (haveResumePosition) {
player.seekTo(resumeWindow,resumePosition);
}
player.prepare(mediaSource,!haveResumePosition,false);
playerNeedsSource = false;
eventEmitter.loadStart();
loadVideoStarted = true;
}
// Initializing the playerControlView
initializePlayerControl();
setControls(controls);
applyModifiers();
}
},1);
}
我的代码中是否缺少任何内容？