[]关于LayaBox启动的问题。

使用LayaBox网络加载方案，在首次启动时经常黑屏，这个是抓取的日志如下：

I/LayaBox (12689): read index:/data/data/com.klzz.platform/cache//LayaCache//appCache/48a42618/filetable.txt

E/LayaBox (12689): read index failed

I/LayaBox (12689): Download [ ]:http://192.168.137.1/public/sh ... i.ttf

I/LayaBox (12689): >>>>>>>>>>>>>bGLCanvasSizeChanged w=1920 h= 1080

I/LayaBox (12689): >>>>>>>>>>>>>>>>innerWidth:1920innerHeight:1080

I/GlobalPushManager( 4888): checkPollAndPopSend --> mSenderInfo = SenderInfo{mSendList_size = 0, mLock = java.lang.Object@371aea59, mLastTimeSender = 0}

D/IC5 ( 4543): readEventLogs : User_activity-->1489977325537753559 :com.yunos.tv.homeshell

D/IC5 ( 4543): readEventLogs : am_on_paused_called--> packnameString = 1489977325752612684 :com.yunos.tv.homeshell

D/IC5 ( 4543): readEventLogs : am_on_resume_called--> packnameString = 1489977326342674309 :com.klzz.platform

D/IC5 ( 4543): readEventLogs : am_activity_launch_time-->com.klzz.platform/.PlatformActivity :com.klzz.platform/.PlatformActivity

I/wpa_supplicant( 4401): [CTRL_IFACE] wlan0: 'SIGNAL_POLL'

D/Analytics.UploadTask.4837.621( 4837): [uploadEventLog]

D/Analytics.DBMgr.4837.621( 4837): [find] DBMgr,sql:SELECT * FROM log ORDER BY priority DESC , time DESC LIMIT 20

D/Analytics.LogStoreMgr.4837.621( 4837): [get] LogStoreMgr,[get]:

D/Analytics.UploadMgr$4.4837.621( 4837): [onUploadExcuted],mCurrentUploadInterval:30000

D/Analytics.CommitTask.4837.624( 4837): [run] CommitTask,check&commit event:65503

D/Analytics.CommitTask.4837.624( 4837): [run] CommitTask,check&commit event:65502

D/Analytics.CommitTask.4837.624( 4837): [run] CommitTask,check&commit event:65501

I/_sendLog( 8298): TBSEngine:_sendlog

I/saveToStorage( 8298): TBSEngine:commit to storage

I/request[transfer_data]( 8298): TBSEngine:skip[no logs]

I/saveToStorage( 8298): TBSEngine:commit to storage

D/Analytics.CommitTask.4888.1513( 4888): [run] CommitTask,check&commit event:65502

D/Analytics.CommitTask.4888.1513( 4888): [run] CommitTask,check&commit event:65501

D/Analytics.CommitTask.4888.1513( 4888): [run] CommitTask,check&commit event:65503

I/GlobalPushManager( 4888): checkPollAndPopSend --> mSenderInfo = SenderInfo{mSendList_size = 0, mLock = java.lang.Object@371aea59, mLastTimeSender = 0}

I/wpa_supplicant( 4401): [CTRL_IFACE] wlan0: 'SIGNAL_POLL'

I/GlobalPushManager( 4888): checkPollAndPopSend --> mSenderInfo = SenderInfo{mSendList_size = 0, mLock = java.lang.Object@371aea59, mLastTimeSender = 0}

I/SENTRY ( 5526): [DEBUG] << getaddrinfo ip.taobao.com ^ 1024 0 1 0 0

I/SENTRY ( 5526): [DEBUG] Cache hit, Q = ip.taobao.com, A = 42.120.226.92.

I/GlobalPushManager( 4888): checkPollAndPopSend --> mSenderInfo = SenderInfo{mSendList_size = 0, mLock = java.lang.Object@371aea59, mLastTimeSender = 0}

I/wpa_supplicant( 4401): [CTRL_IFACE] wlan0: 'SIGNAL_POLL'

E/LayaBox (12689): download error: timeout, dt=8,opttimeout=1798

I/LayaBox (12689): Downloaded http://192.168.137.1/public/sh ... tf%40 s=0 l=0

I/LayaBox (12689): onerror UnknownError

I/LayaBox (12689): Download [ ]:http://runtime.layabox.com/font/simhei.ttf

I/SENTRY ( 5526): [DEBUG] << getaddrinfo runtime.layabox.com 80 0 2 1 0 0

I/SENTRY ( 5526): [DEBUG] Resolve success, Q = runtime.layabox.com, A = 110.53.75.44.

I/GlobalPushManager( 4888): checkPollAndPopSend --> mSenderInfo = SenderInfo{mSendList_size = 0, mLock = java.lang.Object@371aea59, mLastTimeSender = 0}

I/wpa_supplicant( 4401): [CTRL_IFACE] wlan0: 'SIGNAL_POLL'

I/GlobalPushManager( 4888): checkPollAndPopSend --> mSenderInfo = SenderInfo{mSendList_size = 0, mLock = java.lang.Object@371aea59, mLastTimeSender = 0}

I/LayaBox (12689): Download end:200

I/LayaBox (12689): Downloaded http://runtime.layabox.com/fon ... 75.44 s=0 l=4529044

I/LayaBox (12689): download end

I/LayaBox (12689): parse:normal 100 16px Arial,fontinfo:size:16,family:Arial

E/LayaBox (12689): download file error[1]:file:///data/data/com.klzz.platform/cache/LayaCache/localstorage/logo/logo.png

I/LayaBox (12689):  require(/sdcard/layabox/scripts/config.js)

I/LayaBox (12689): found the file in the package:scripts/config.js

I/LayaBox (12689): Download [  ]:http://192.168.137.1/public/sh ... 2.471

E/LayaBox (12689): download image file error! file:////data/data/com.klzz.platform/cache//LayaCache//localstorage/logo/logo.png

I/LayaBox (12689): found the file in the package:logo.swf

I/LayaBox (12689):  xhr.GET url=file:////data/data/com.klzz.platform/cache//LayaCache//localstorage/logo.swf

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由上可得知，LayaBox启动的顺序是：
1、加载取本地文件列表：filetable.txt;
2、再从apk指定的服务器上加载：simhei.ttf；
3、如果当前提供的服务器上不存在simheittf文件，则从：http://runtime.layabox.com/font/simhei.ttf 这个地址上下载；
4、加载simhei.tff后，再加载logo.png；
5、最后显示加载界面；
-----------------------------------------------------
上述流程会导致黑屏，原因如下：
1、当simhei.tff在游戏指定的服务器上不存在或是网络不顺畅的时候，系统会有一个阻塞时间，大概约1s~2s；
2、如果下载失败，则会从：http://runtime.layabox.com/font/simhei.ttf 这个地址上下载，如果网络不顺畅时，系统也会有一个阻塞时间，大概约1s~2s；
3、simhei.tff文件大小是：4,529,044字节【约4.5M】，下载这样一个文件也需要大概2秒左右；
总结上述流程总共需要花费约5秒，而这5秒系统是没有任何显示的；
只有当simhei.tff加载完成之后，load.js才会将logo.png或logo.swf才显示出来；
这个时候才看到加载界面。
测试系统：YunOS 6.0
下载摘自：index.js 

if (bRet == false) {

            var sTempFontPath = conch.getCachePath() + "/runtimeFont/";

            if (!fs_exists(sTempFontPath)) {

                fs_mkdir(sTempFontPath);

            }

            sTempFontPath += "layabox.ttf";

            bRet = conch.initFreeTypeDefaultFontFromFile(sTempFontPath);

            if (bRet == false) {

                var data = ([b]yield asyncs.downloadSync[/b](location.fullpath + '/font/simhei.ttf', true, null));

                if (!data) {

                    data = ([b]yield asyncs.downloadSync[/b]('http://runtime.layabox.com/font/simhei.ttf', true, null));

                }

                if (!data) {

                    alert('>>>download ttf error ');

                    return;

                }

                fs_writeFileSync(sTempFontPath, data);

                conch.initFreeTypeDefaultFontFromFile(sTempFontPath);

            }

        }

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个人认为这样是十分差的用户体验。
正常的流程应该是：
1、启动时检查本地缓存中 是否存在加载界面的配置或资源；
2、存在，则显示缓存中的加载界面；
3、不存在，则显示默认的加载界面；
4、接下来再去下载相应的字体文件【或干脆将这一部分直接打包到sdk中去】；
5、提供游戏开发者自定义更新加载界面的接口；