How to make your Android projects more portable to Windows/MacOS (and vice versa)

Tiancheng Hu is a senior tech consultant working at an ISV company (major products including scanner-based ECM, Asset Management), and holds Bachelor(SJTU@China) and Master(KIT@Japan) degrees in Computer Science. He showed favorites at Enterprise/Personal Knowledge Management and Efficiency Enhancement stuff (like MindMap/GTD/FastReading), and luckily had made prototype/proposal on an Enterprise Blog webapp(June,2000) and a portable PKM app(May,2010), before the public appearance of Blog or EverNote (in Chinese market).
When he is not working at designing/prototyping/consulting, he enjoys Chinese traditional spiritual practice/zen as well as fantasy novels/strategy games/scribble.