Android7.0 开机动画之后播放一段视频会黑屏

[程序猴f]

有没有大神添加过开机广告，就是在第一次开机开机动画之后即launcher启动前播放一段广告视频，本人已成功添加，但是通过videoView播放放在res下的视频，其中自定义的activity中通过以下代码实现视频播放

 
//加载指定的视频文件
        String path = "android.resource://"+getPackageName()+"/"+R.raw.advert;
        //String path = Environment.getExternalStorageDirectory().getPath()+"/temp.mp4";
        Log.i("tag","path= "+path);
        if (!TextUtils.isEmpty(path)){
            videoView.setVideoPath(path);
            videoView.setVideoURI(Uri.parse(path));
            videoView.requestFocus();
            videoView.start();
        }

        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setOnInfoListener(new MediaPlayer.OnInfoListener() {
                    @Override
                    public boolean onInfo(MediaPlayer mp, int what, int extra) {
                        Log.i("tag","what= "+what);
                        if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START){
//                            videoView.setBackgroundResource(R.drawable.shutdown_bg);
                            videoView.setBackgroundColor(Color.TRANSPARENT);
                        }
                        return false;
                    }
                });
            }
        });

        videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                Log.i("tag","persist.sys.videoad.finished= "+SystemProperties.get("persist.sys.videoad.finished","0"));
                if("0".equals(SystemProperties.get("persist.sys.videoad.finished","0"))){
                    SystemProperties.set("persist.sys.videoad.finished","1");
                }
                finish();
                //mp.start();
                //mp.setLooping(true);

            }
        });

之后在AndroidManagerService.java的startHomeActivityLocked方法中进行跳转实现

 if("0".equals(SystemProperties.get("persist.sys.videoad.finished","0"))){
                if(!mVideoAdvertActivityRunning){
                    Intent videoAdvertActivity = new Intent();
                    videoAdvertActivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    videoAdvertActivity.setClassName("com.android.systemui","com.android.systemui.VideoAdvertActivity");
                    mContext.startActivity(videoAdvertActivity);
                    mVideoAdvertActivityRunning = true;
                }
                return false;
        }

以上修改可以实现在launcher启动前播放一段视频，但播放前会有一段黑屏，原本在开机动画播放完后将进入launcher前就有黑屏，但相比较黑屏时间较短，请问该如何优化？