onStartLoading方法中通过runOnUiThread{
pluginManager.onLoading();如果mPlayerListener!=NULL,调用mPlayerListener.onstartBuffering();if(PlayerUtil.useUpPlayer()&&!mediaPlayerDelegate.videoInfo.isUser安车P按合同()) mediaplayerDelegeate.loadingPause();
方法onendLoading();调用pluginmanager.onLoaded();mPlayerListener.onEndBuffering();