Build sequence
1. javac HelloNativeTest.java
2. gcc -fPIC -I /home/xfb/install/jdk1.6.0_27/include -I /home/xfb/install/jdk1.6.0_27/include/linux -shared -o libHelloNative.so HelloNative.c
3. java -Djava.library.path=. HelloNativeTest
ndk build
1. ndk-build