@Override
public void onClick(View v) {
mGetJni.setText(getJniDatas());
}
});
}
/**
* A native method that is implemented by the
* 'hello-jni' native library, which is packaged
* with this application.
* @return
*/
public native String getJniDatas();
/**
*This is another native method declaration that is *not*
* implemented by 'hello-jni'. This is simply to show that
* you can declare as many native methods in your Java code
* as you want, their implementation is searched in the
* currently loaded native libraries only the first time
* you call them.
*
* Trying to call this function will result in a
* java.lang.UnsatisfiedLinkError exception !
* @return
*/
public native String unimplementedGetJniDatas();
/**
* this is used to load the 'hello-jni' library on application
* startup. The library has already been unpacked into
* /data/data/com.example.HelloJni/lib/libhello-jni.so at
* installation time by the package manager.
*/
static{
System.loadLibrary("hello-jni");
}
}
上面有注释，其native方法为JNI需要调用与执行的方法，
在布局里就添加了一个按钮与一个文本，使用按钮单点后来获得文本显示的字符为JNI所得来的数据,其实这个过程很简单，基本就是NDK里面本身的列子般过来运行一样，等这都完了，先不要急于运行，你需要先把C文件进行编译后才能执行运行APP，在命令行进入其目录的JNI目录,使用ndk-build命令来构建编译：
你会看到：jankey@jankey-ThinkPad-Edge:~/workspace/jni_demo/jni$ ndk-build
Compile thumb : hello-jni <= hello-jni.c
SharedLibrary : libhello-jni.so
Install : libhello-jni.so => libs/armeabi/libhello-jni.so，生成了两个文件目录：
即两个.so为后缀的文件，在这里基本就没什么问题了，这样就建立了C与JAVA通信的一个过程，OK，使用CTRI+F11开始运行其APP：
，先我们可以单击来获取JNI返回回来的数据了:
这就把数据给调出来了，如果你是初学者，你还等什么呢，赶快动手吧，希望这能给在入门里做最给里的参考，谢谢。