//---hello.c

#include <stdio.h>

int main(int argc, char **argv)

{  

    printf("Hello world!\n");  

    return 0;  

}  

//---Android.mk

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := optional

LOCAL_SRC_FILES:= \

    hello.c

LOCAL_MODULE := helloworld

include $(BUILD_EXECUTABLE)