hi
Kanaan from Gaza Palestine, computer engineering with master degree, programming java since 2000, and now turn on android, familiar with many android technologies, material desing language.
i have background on javascript, css3 ,html5, I am working now on phonegap.
I can program an android project using android studio, an reading any map as assest raw data, google provides tool to export dataset as KML rather than XML, but we can put dataset in XML format, if maps are very large in size user can put them on sdk card, android application can access them and load selected one,