Android 里的 MediaPlayer 因为缓冲停止了播放，显示提示

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mp.setOnInfoListener(new OnInfoListener() {
                @Override
                public boolean onInfo(MediaPlayer mp, int what, int extra) {
                    if (what == MediaPlayer.MEDIA_INFO_BUFFERING_START) {
                        loadingDialog.setVisibility(View.VISIBLE);
                    } else if (what == MediaPlayer.MEDIA_INFO_BUFFERING_END) {
                        loadingDialog.setVisibility(View.GONE);
                    }
                    return false;
                }
            });