首先是引入exoplayer2庫
...
implementation 'com.google.android.exoplayer:exoplayer-core:2.6.0'
implementation 'com.google.android.exoplayer:exoplayer-ui:2.6.0'
...

目前官方庫中自帶了兩種Exoplayer實(shí)現(xiàn), 分別是SimpleExoPlayer和ExoPlayerImpl.

實(shí)際上在SimpleExoPlayer內(nèi)部, 其播放功能是委托給ExoPlayerImpl實(shí)現(xiàn)的.

private final ExoPlayer player;
// Build the player and associated objects.
player = createExoPlayerImpl(renderers, trackSelector, loadControl);
....
protected ExoPlayer createExoPlayerImpl(Renderer[] renderers, TrackSelector trackSelector,
  LoadControl loadControl) {
    return new ExoPlayerImpl(renderers, trackSelector, loadControl);
}

問題: SimpleExoPlayer與ExoPlayerImpl有什么區(qū)別? 在功能上有什么不同 ? 實(shí)際使用時(shí)應(yīng)該怎么選擇?
-- 如果沒有特殊需求, SimpleExoPlayer就能滿足基本功能了, 不需要自定義

ExoPlayer的創(chuàng)建是通過工廠類ExoPlayerFactory來實(shí)現(xiàn)的. 里面重載了各種參數(shù)的創(chuàng)建方法, 下面是最簡(jiǎn)單的一個(gè):

/**
* Creates a {@link SimpleExoPlayer} instance.
*
* @param context A {@link Context}.
* @param trackSelector The {@link TrackSelector} that will be used by the instance.
*/
public static SimpleExoPlayer newSimpleInstance(Context context, TrackSelector     trackSelector) {
  return newSimpleInstance(new DefaultRenderersFactory(context), trackSelector);
}


 /**
  * Creates an {@link ExoPlayer} instance.
  *
  * @param renderers The {@link Renderer}s that will be used by the instance.
  * @param trackSelector The {@link TrackSelector} that will be used by the instance.
 */
 public static ExoPlayer newInstance(Renderer[] renderers, TrackSelector trackSelector) {
   return newInstance(renderers, trackSelector, new DefaultLoadControl());
 }

代碼