很好用的Linux-android交叉编译工具链，可以用来浮点运算和编译.so库来供android JAVA端来调用！-Very good use of the Linux-android cross compiler tool chain, can be used for floating point operations and compilation of the.So library for Android JAVA end to call!

这是一个在android下进行gpio驱动开发的例子，在这个例子中分别从底层驱动代码到测试程序再到android上的JNI层，然后通过java代码调用APP Framework层的接口实现对开发板上led的控制(This is carried out under a gpio android-driven development example, in this case were driven from the bottom to the android code to the test pr