http://stackoverflow.com/questions/21158332/android-ndk-your-app-build-script-points-to-an-unknown-file-c-android-ndk-jni
The result is because you haven't set NDK_PROJECT_PATH to the parent directory of "jni" in your project.
For example, in my project directory, I use:
export NDK_PROJECT_PATH=`pwd`And compilation works fine.