1. 下载安装 Android NDK，不必赘述。假定我们安装到了 /Developer/android-ndk-r4b/.
2. 在工作目录下建立一个 jni 目录。如果要使用 NDK 自带的 Android.mk，必须叫做这个名字，否则 make 的时候会找不到文件，错误提示可能类似下面:
Android NDK: Could not find application project directory ! Android NDK: Please define the NDK_PROJECT_PATH variable to point to it. /Developer/android-ndk-r4b/build/core/build-local.mk:85: *** Android NDK: Aborting . Stop.
把程序源码放到这个目录。假定程序的名字是 hello.c，那么目录结构为
<Project>/jni/hello.c
3. 从 NDK 的 sample 里复制一份 Android.mk 到 jni 目录。因为我们编译的是 Native App 可执行程序而不是 JNI lib，所以需要修改 Android.mk，把 include $(BUILD_SHARED_LIBRARY ) 改成 include $(BUILD_EXECUTABLE ).
这里给出示例的 Android.mk 文件内容：
# 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 # # # # 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. # LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := hello LOCAL_SRC_FILES := hello.c #include $(BUILD_SHARED_LIBRARY) include $(BUILD_EXECUTABLE)
4. 在 <Project> 目录中运行 /Developer/android-ndk-r4b/ndk-build. 如果编译没有错误，那么输出为：
Compile thumb : hello <= <Project>/jni/hello.c Executable : hello Install : hello => <Project>/libs/armeabi
那么，我们需要的可执行文件就在 libs/armeabi 目录下了。可以用 adb push 上传到手机或者模拟器中运行测试。