Add Game to Android application

Hi everyone,

I am trying to add a game made with Construct 2 in an existing Android application. I would like to play the game offline, that is why I want to add the game to the Android project.

Unfortunately, when I export the game to Html5 website all the png created have a "-" and with this character is not possible to add those files in an Android project. Is it possible to change the "-" character when the game is exported? is there any other option to add the game to an Android project?

The app is already done, so PhoneGap is not an option right now.

Thanks for your time.