在Windows系统中使用NDK编译Android二进制文件并运行

参考：

1、Android 使用NDK编译二进制文件并运行

https://blog.csdn.net/u014088294/article/details/49924967

2、ndk 命令编译C或c++代码生成android 动态so库和可执行程序

https://blog.csdn.net/qq_29333911/article/details/81911897

1，添加Windows ndk环境变量到path中，如下：

C:\Users\zeng\AppData\Local\Android\Sdk\ndk-bundle

2，参考如下步骤

首先新建一个HelloWorld文件夹，在其内部建立一个子文件夹jni，

jni包含3个文件夹，hello.c，Android.mk，Application.mk

1. hello.c 代码如下

======

#include

int main(void){

printf("Hello World!\n");

return 0;

}

代码很简单，就是输出一句话

Android.mk文件

======

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := hello

LOCAL_SRC_FILES := hello.c

include $(BUILD_EXECUTABLE)

Application.mk文件

======

APP_ABI := all

如下为我在Windows本地编译的spi测试程序

======

C:\zeng\workspace\Code\MSM8937_code_change\spitestrw>ndk-build

Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.

[arm64-v8a] Compile : spi_read_write <= spi_read_write.c

[arm64-v8a] Executable : spi_read_write

[arm64-v8a] Install : spi_read_write => libs/arm64-v8a/spi_read_write

[x86_64] Compile : spi_read_write <= spi_read_write.c

[x86_64] Executable : spi_read_write

[x86_64] Install : spi_read_write => libs/x86_64/spi_read_write

[armeabi-v7a] Compile thumb : spi_read_write <= spi_read_write.c

[armeabi-v7a] Executable : spi_read_write

[armeabi-v7a] Install : spi_read_write => libs/armeabi-v7a/spi_read_write

[x86] Compile : spi_read_write <= spi_read_write.c

[x86] Executable : spi_read_write

[x86] Install : spi_read_write => libs/x86/spi_read_write

ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk NDK_APPLICATION_MK=./Application.mk

C:\zeng\workspace\Code\MSM8937_code_change\spitest>ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk NDK_APPLICATION_MK=./Application.mk

Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.

[arm64-v8a] Compile : spidev_test <= spidev_test.c

[arm64-v8a] Executable : spidev_test

[arm64-v8a] Install : spidev_test => libs/arm64-v8a/spidev_test

[x86_64] Compile : spidev_test <= spidev_test.c

[x86_64] Executable : spidev_test

[x86_64] Install : spidev_test => libs/x86_64/spidev_test

[armeabi-v7a] Compile thumb : spidev_test <= spidev_test.c

[armeabi-v7a] Executable : spidev_test

[armeabi-v7a] Install : spidev_test => libs/armeabi-v7a/spidev_test

[x86] Compile : spidev_test <= spidev_test.c

[x86] Executable : spidev_test

[x86] Install : spidev_test => libs/x86/spidev_test

ZB 2/25: 使用NDK时遇到如下错误：

Please define the NDK_PROJECT_PATH variable to point to it

解决方法参考：

https://blog.csdn.net/yuanjingjiang/article/details/34857623

在用ndk-buld 编译c/c++工程的时候，会遇到上面提示的错误原因是你的当前目录不是一个名为“jni”的目录，

所以NDK_PROJECT_PATH， APP_BUILD_SCRIPT， NDK_APPLICATION_MK 是一个空的值，

ndk-build就没法只知道怎么编译而终止。

想要解决有两种办法：

a. 一个就是制定上面三个变量的值，如：我要编译我当前目录的源文件，当然包含Android.mk 和Application.mk 文件，可以使用这样的命令编译：

ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk NDK_APPLICATION_MK=./Application.mk

b. 就是把这些文件放在一个jni目录下，进入jni目录然后在编译。

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