[Android] 安裝NDK與使用JNI呼叫系統底層native的C C++程式 (Java call C)

http://j796160836.pixnet.net/blog/post/31583827
http://blog.csdn.net/cupidove/article/details/8024596
http://huenlil.pixnet.net/blog/post/23801824-%5B%E8%BD%89%5Dandroid-jni%E5%AF%A6%E4%BE%8B
http://blog.changyy.org/2011/07/android-android-ndk-native-development.html
http://magiclen.org/android-jni/

Android通過JNI調用驅動程序(完全解析實例)
http://blog.csdn.net/ok138ok/article/details/6317212
http://blog.csdn.net/ok138ok/article/details/6560875

javah command
javah  -o  com_myproject_MyActivity.h  -classpath  <android-sdk-location>/platforms/android-19/android.jar;myprojectDIR\bin\classes  com.myproject.MyActivity
          -classpath => class path
          -d <dir>    => output folder to store header file
          -o <file>   => output header file