When you export your cordova app and trying convert that android. App show splash screen and 1-2 seconds and screen is black.. nothing showing.. sounds... music works and others...
Problems is WebGl 2... some page found different quide to fix that, but nothing is perfect.
My last worked fix change preview.js file construct 2 export html5 folder or c2runtime.js file exported www folder.. line is 510
this.gl = (this.canvas.getContext("webgl2", attribs) ||
this.gl = (this.canvas.getContext("webgl", attribs) ||
preview.js make that permanent and everytime export cordova problems has ignored....
I hove Scirra fix that problem someday.. Exam put export select box where can select webgl 1 or webgl 2 used.