Simple NDK example for android and c++
You need to download android-ndk to make it work.
Main difference between 'normal' project and ndk project is build.gradle, app's and as well project's gradle.
This project supports C++11, it has simple String returning, double array suming and printing logcat from native.
Update 09.10.2016: Updated gradle, libraries and project to Android Studio 2.2.
Update 03.07.2016: Updated gradle-experimental to 0.7.2 and made appriopate changed. Tested on Android Studio 2.1.