[LayaNative 2.0]laya2.0构建app时url不再支持.html文件，但是需要runtime.json这个文件是怎么来的？

下面是仿真时的报错信息
 I/LayaBox: Download [  ]:http://192.168.0.72/web3/updat ... 0.844
I/LayaBox: >>>JCConchRender::clearAllData =-815802000
D/EGL_emulation: eglMakeCurrent: 0xe05ec520: ver 3 1 (tinfo 0xe201f990)
W/LayaBox: download error: timeout, dt=8,opttimeout=1798
I/LayaBox: Downloaded http://192.168.0.72/web3/updat ... 44%40 s=0 l=0
I/LayaBox: Download [  ]:http://192.168.0.72/web3/runtime.json
W/LayaBox: download error: timeout, dt=8,opttimeout=1798
I/LayaBox: Downloaded http://192.168.0.72/web3/runtime.json@ s=0 l=0
I/LayaBox: Download [  ]:http://192.168.0.72/web3/runtime.json
W/LayaBox: download error: timeout, dt=8,opttimeout=1798
I/LayaBox: Downloaded http://192.168.0.72/web3/runtime.json@ s=0 l=0
I/LayaBox: Download [  ]:http://192.168.0.72/web3/runtime.json
W/LayaBox: download error: timeout, dt=8,opttimeout=1798
I/LayaBox: Downloaded http://192.168.0.72/web3/runtime.json@ s=0 l=0
I/LayaBox: Download [  ]:http://192.168.0.72/web3/runtime.json
W/LayaBox: download error: timeout, dt=8,opttimeout=1798
I/LayaBox: Downloaded http://192.168.0.72/web3/runtime.json@ s=0 l=0
I/LayaBox: JSRuntime::callMethod {}
           JSRuntime::callMethod {}
E/LayaBox: JsAppCache::loadCachedURL Error, no cache data.