我已经使用Codelab中的示例在我的应用程序中实现了ExoPlayer：https://codelabs.developers.google.com/codelabs/exoplayer-intro/#3，algo和https://medium.com/google-exoplayer/playing-ads-with-exoplayer-and-ima-868dfd767ea中的示例，唯一的区别是我使用AdsMediaSource代替已弃用ImaAdsMediaSource。
我的实现是这样的：
class HostVideoFullFragment : Fragment(), AdsMediaSource.MediaSourceFactory {
override fun getSupportedTypes() = intArrayOf(C.TYPE_DASH, C.TYPE_HLS, C.TYPE_OTHER)
override fun createMediaSource(uri: Uri?, handler: Handler?, listener: MediaSourceEventListener?): MediaSource {
@C.ContentType val type = Util.inferContentType(uri)
return when (type) {
C.TYPE_DASH -> {
DashMediaSource.Factory(
DefaultDashChunkSource.Factory(mediaDataSourceFactory),
manifestDataSourceFactory)
.createMediaSource(uri, handler, listener)
}
C.TYPE_HLS -> {
HlsMediaSource.Factory(mediaDataSourceFactory)
.createMediaSource(uri, handler, listener)
}
C.TYPE_OTHER -> {
ExtractorMediaSource.Factory(mediaDataSourceFactory)
.createMediaSource(uri, handler, listener)
}
else -> throw IllegalStateException("Unsupported type for createMediaSource: $type")
}
}
private var player: SimpleExoPlayer? = null
private lateinit var playerView: SimpleExoPlayerView
private lateinit var binding: FragmentHostVideoFullBinding
private var playbackPosition: Long = 0
private var currentWindow: Int = 0
private var playWhenReady = true
private var inErrorState: Boolean = false
private lateinit var adsLoader: ImaAdsLoader
private lateinit var manifestDataSourceFactory: DataSource.Factory
private lateinit var mediaDataSourceFactory: DataSource.Factory
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
//Initialize the adsLoader
adsLoader = ImaAdsLoader(activity as Context, Uri.parse("https://pubads.g.doubleclick.net/gampad/ads?sz=640x480&iu=/124319096/external/ad_rule_samples&ciu_szs=300x250&ad_rule=1&impl=s&gdfp_req=1&env=vp&output=vmap&unviewed_position_start=1&cust_params=deployment%3Ddevsite%26sample_ar%3Dpremidpost&cmsid=496&vid=short_onecue&correlator="))
manifestDataSourceFactory = DefaultDataSourceFactory(
context, Util.getUserAgent(context, "BUO-APP"))//TODO change the applicationName with the right application name
//
mediaDataSourceFactory = DefaultDataSourceFactory(
context,
Util.getUserAgent(context, "BUO-APP"),//TODO change the applicationName with the right application name
DefaultBandwidthMeter())
}
private fun initializePlayer() {
/*
* Since the player can change from null (when we release resources) to not null we have to check if it's null.
* If it is then reset again
* */
if (player == null) {
//Initialize the Exo Player
player = ExoPlayerFactory.newSimpleInstance(DefaultRenderersFactory(activity as Context),
DefaultTrackSelector())
}
val uri = Uri.parse(videoURl)
val mediaSourceWithAds = buildMediaSourceWithAds(uri)
//Bind the view from the xml to the SimpleExoPlayer instance
playerView.player = player
//Add the listener that listens for errors
player?.addListener(PlayerEventListener())
player?.seekTo(currentWindow, playbackPosition)
player?.prepare(mediaSourceWithAds, true, false)
//In case we could not set the exo player
player?.playWhenReady = playWhenReady
//We got here without an error, therefore set the inErrorState as false
inErrorState = false
//Re update the retry button since, this method could have come from a retry click
updateRetryButton()
}
private inner class PlayerEventListener : Player.DefaultEventListener() {
fun updateResumePosition() {
player?.let {
currentWindow = player!!.currentWindowIndex
playbackPosition = Math.max(0, player!!.contentPosition)
}
}
override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
//The player state has ended
//TODO check if there is going to be a UI change here
// if (playbackState == Player.STATE_ENDED) {
// showControls()
// }
// updateButtonVisibilities()
}
override fun onPositionDiscontinuity(@Player.DiscontinuityReason reason: Int) {
if (inErrorState) {
// This will only occur if the user has performed a seek whilst in the error state. Update
// the resume position so that if the user then retries, playback will resume from the
// position to which they seek.
updateResumePosition()
}
}
override fun onPlayerError(e: ExoPlaybackException?) {
var errorString: String? = null
//Check what was the error so that we can show the user what was the correspond problem
if (e?.type == ExoPlaybackException.TYPE_RENDERER) {
val cause = e.rendererException
if (cause is MediaCodecRenderer.DecoderInitializationException) {
// Special case for decoder initialization failures.
errorString = if (cause.decoderName == null) {
when {
cause.cause is MediaCodecUtil.DecoderQueryException -> getString(R.string.error_querying_decoders)
cause.secureDecoderRequired -> getString(R.string.error_no_secure_decoder,
cause.mimeType)
else -> getString(R.string.error_no_decoder,
cause.mimeType)
}
} else {
getString(R.string.error_instantiating_decoder,
cause.decoderName)
}
}
}
if (errorString != null) {
//Show the toast with the proper error
Toast.makeText(activity as Context, errorString, Toast.LENGTH_LONG).show()
}
inErrorState = true
if (isBehindLiveWindow(e)) {
clearResumePosition()
initializePlayer()
} else {
updateResumePosition()
updateRetryButton()
}
}
}
private fun clearResumePosition() {
//Clear the current resume position, since there was an error
currentWindow = C.INDEX_UNSET
playbackPosition = C.TIME_UNSET
}
/*
* This is for the multi window support
* */
private fun isBehindLiveWindow(e: ExoPlaybackException?): Boolean {
if (e?.type != ExoPlaybackException.TYPE_SOURCE) {
return false
}
var cause: Throwable? = e.sourceException
while (cause != null) {
if (cause is BehindLiveWindowException) {
return true
}
cause = cause.cause
}
return false
}
private fun buildMediaSourceWithAds(uri: Uri): MediaSource {
/*
* This content media source is the video itself without the ads
* */
val contentMediaSource = ExtractorMediaSource.Factory(
DefaultHttpDataSourceFactory("BUO-APP")).createMediaSource(uri) //TODO change the user agent
/*
* The method constructs and returns a ExtractorMediaSource for the given uri.
* We simply use a new DefaultHttpDataSourceFactory which only needs a user agent string.
* By default the factory will use a DefaultExtractorFactory for the media source.
* This supports almost all non-adaptive audio and video formats supported on Android. It will recognize our mp3 file and play it nicely.
* */
return AdsMediaSource(
contentMediaSource,
/* adMediaSourceFactory= */ this,
adsLoader,
playerView.overlayFrameLayout,
/* eventListener= */ null, null)
}
override fun onStart() {
super.onStart()
if (Util.SDK_INT > 23) {
initializePlayer()
}
}
override fun onResume() {
super.onResume()
hideSystemUi()
/*
* Starting with API level 24 Android supports multiple windows.
* As our app can be visible but not active in split window mode, we need to initialize the player in onStart.
* Before API level 24 we wait as long as possible until we grab resources, so we wait until onResume before initializing the player.
* */
if ((Util.SDK_INT <= 23 || player == null)) {
initializePlayer()
}
}
}
广告从不显示，如果显示，则会显示从不允许视频显示的呈现错误E/ExoPlayerImplInternal: Renderer error.。我运行了IMA广告https://developers.google.com/interactive-media-ads/docs/sdks/android/示例代码中的示例，但它既不起作用也不起作用。有没有人用最新的ExoPlayer库版本成功实现了Exo Player？
请帮忙。谢谢！
答案 0 :(得分：1)
在模拟器上时，请确保在虚拟设备上启用gpu呈现
答案 1 :(得分：0)
问题是模拟器无法呈现视频。因此，它没有显示广告或视频。在手机上运行该应用程序即可运行