Android exoplayer播放在线视频教程

公司项目里面需要用到视频播放器，所以试了好多Android的视频播放器方案，最后试水结果是谷歌的exoplayer和哔哩哔哩的ijkplayer视频加载速度和播放性能比较好，由于exoplayer貌似和谷歌的激励视频广告的sdk里面用的exoplayer似乎有冲突，

所以只好换成了ijkplayer的方案，这里记录下exoplayer的使用过程，以便以后查阅使用。

在glide中依赖exoplyaer的库首先：

dependencies {
    implementation 'com.google.android.exoplayer:exoplayer:r2.0.0'
}

布局中加入exoplayer的视频控件：

代码调用：

 var  playerView :PlayerView= view.video_wallpaper_img
//                      playerView!!.controllerShowTimeoutMs = 0
                        playerView!!.controllerAutoShow = false
                        player = PlayerManager(activity)
                        player!!.setContentUrl(bean!!.url)
                        player!!.setImgPreview(view.iv_wallpaper_video_preview)

PlayerManager类的代码：

import android.content.Context;
import android.net.Uri;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;

import com.blossom.ripple.R;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.C.ContentType;
import com.google.android.exoplayer2.ExoPlaybackException;
import com.google.android.exoplayer2.ExoPlayer;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.PlaybackParameters;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.Timeline;
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
import com.google.android.exoplayer2.extractor.ExtractorsFactory;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.source.LoopingMediaSource;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.source.TrackGroupArray;
import com.google.android.exoplayer2.source.ads.AdsMediaSource;
import com.google.android.exoplayer2.source.dash.DashMediaSource;
import com.google.android.exoplayer2.source.hls.HlsMediaSource;
import com.google.android.exoplayer2.source.smoothstreaming.SsMediaSource;
import com.google.android.exoplayer2.trackselection.AdaptiveTrackSelection;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.trackselection.TrackSelection;
import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
import com.google.android.exoplayer2.trackselection.TrackSelector;
import com.google.android.exoplayer2.ui.PlayerView;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;

/** Manages the {@link ExoPlayer}, the IMA plugin and all video playback. */
/* package */public final class PlayerManager implements AdsMediaSource.MediaSourceFactory {

  private final DataSource.Factory dataSourceFactory;
  String contentUrl = "";
  private String TAG = "PlayerManager";
  ImageView imgPreview = null;

  public void setContentUrl(String contentUrl) {
    this.contentUrl = contentUrl;
  }

  private SimpleExoPlayer player;
  private long contentPosition;

  public void setImgPreview(ImageView imgPreview) {
    this.imgPreview = imgPreview;
  }

  public PlayerManager(Context context) {
    dataSourceFactory =
        new DefaultDataSourceFactory(
            context, Util.getUserAgent(context, context.getString(R.string.app_name)));
  }

  public void init(Context context, PlayerView playerView) {
    // Create a default track selector.
    TrackSelection.Factory videoTrackSelectionFactory;
    videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(new DefaultBandwidthMeter());
    TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);

    // Create a player instance.
    player = ExoPlayerFactory.newSimpleInstance(context, trackSelector);

    // Bind the player to the view.
    playerView.setPlayer(player);

    // This is the MediaSource representing the content media (i.e. not the ad).
//    String contentUrl = context.getString(R.string.content_url);
//    String contentUrl = "https://html5demos.com/assets/dizzy.mp4";
//    MediaSource contentMediaSource = buildMediaSource(Uri.parse(contentUrl));

    // Compose the content media source into a new AdsMediaSource with both ads and content.
//    MediaSource mediaSourceWithAds =
//        new AdsMediaSource(
//            contentMediaSource,
//            /* adMediaSourceFactory= */ this,
//            adsLoader,
//            playerView.getOverlayFrameLayout());


    // Measures bandwidth during playback. Can be null if not required.
    DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
// Produces Extractor instances for parsing the media data.
    ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();


    MediaSource source = new ExtractorMediaSource(Uri.parse(contentUrl),dataSourceFactory, extractorsFactory, null, null);
// Loops the video indefinitely.
    LoopingMediaSource loopingSource = new LoopingMediaSource(source);
    // Prepare the player with the source.

    player.addListener(eventListener);

    player.seekTo(contentPosition);
    player.prepare(loopingSource);
    player.setPlayWhenReady(true);
    // 静音播放
    player.setVolume(0);

  }

  public void reset() {
    if (player != null) {
      contentPosition = player.getContentPosition();
      player.release();
      player = null;
    }
  }

  public void release() {
    if (player != null) {
      player.release();
      player = null;
    }
  }

  // AdsMediaSource.MediaSourceFactory implementation.

  @Override
  public MediaSource createMediaSource(Uri uri) {
    return buildMediaSource(uri);
  }

  @Override
  public int[] getSupportedTypes() {
    // IMA does not support Smooth Streaming ads.
    return new int[] {C.TYPE_DASH, C.TYPE_HLS, C.TYPE_OTHER};
  }

  // Internal methods.

  private MediaSource buildMediaSource(Uri uri) {
    @ContentType int type = Util.inferContentType(uri);
    switch (type) {
//      case C.TYPE_DASH:
//        return new DashMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
//      case C.TYPE_SS:
//        return new SsMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
      case C.TYPE_HLS:
        return new HlsMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
      case C.TYPE_OTHER:
        return new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
      default:
        throw new IllegalStateException("Unsupported type: " + type);
    }
  }



  private ExoPlayer.EventListener eventListener = new ExoPlayer.EventListener() {


    @Override
    public void onTimelineChanged(Timeline timeline, 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 ExoPlayer.STATE_ENDED:
          Log.i(TAG, "Playback ended!");
          //Stop playback and return to start position
          break;
        case ExoPlayer.STATE_READY:
          if (imgPreview!=null){
            imgPreview.setVisibility(View.GONE);
          }
          break;
        case ExoPlayer.STATE_BUFFERING:
          Log.i(TAG, "Playback buffering!");
          break;
        case ExoPlayer.STATE_IDLE:
          Log.i(TAG, "ExoPlayer idle!");
          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() {

    }

  };



}

记得在fragment的生命周期中做好player的管理和释放销毁，activity中使用的话也是这样

override fun onResume() {
        super.onResume()
       player?.init(activity, playerView)
    
    }

    override fun onPause() {
        super.onPause()
        player?.reset()
      
    }

    override fun onDestroyView() {
       player?.release()
       
        super.onDestroyView()
    }

 

然后就可以播放视频了