Android Studio will soon feature NDK integration. You can reuse C/C++ code on Win/Mac/Linux/Android/iOS, achieving native performance everywhere, and then use the recommended GUI toolkit on each platform [i].
However, C/C++ is intimidating, which is why I think compile-to-C programming languages like Nimrod [ii] are going to be the next big thing.
Comments
Android Studio will soon feature NDK integration. You can reuse C/C++ code on Win/Mac/Linux/Android/iOS, achieving native performance everywhere, and then use the recommended GUI toolkit on each platform [i].
However, C/C++ is intimidating, which is why I think compile-to-C programming languages like Nimrod [ii] are going to be the next big thing.
[i] https://gradha.github.io/articles/2014/03/nimrod-for-cross-p...
[ii] http://picheta.me/articles/2013/10/about-nimrods-features.ht...