在项目的根目录创建jni文件夹，包含三个文件 hello-jni.c   Android.mk  Application.mk

hello-jni.c

include #include jstring JavacomstudyAndroidProMain_getNum( JNIEnv* env, jobject thiz ){ return (*env)->NewStringUTF(env, "Hello JNI!"); }

Android.mk

Copyright (C) 2009 The Android Open Source Project # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # LOCALPATH := $(call my-dir) include $(CLEARVARS) LOCALMODULE := hello-jni LOCALSRCFILES := hello-jni.c include $(BUILDSHARED_LIBRARY)

Application.mk

APP_ABI := all

进入到项目的根目录，运行dos命令 ndk-build

再执行Android就Ok了