Android下openssl编译和使用（二）

接下来我们看看如何使用

1、新建一个测试工程，并勾选include C++ support

2、把openssl-1.1.1b/include下的openssl目录，整个复制到项目src下的cpp子目录

3、把lib下的libcryto.a和libssl.a复制到src/cpp/libs子目录

4、修改CMakeList.txt文件，在cmake_minimum_required(VERSION 3.4.1)后面添加：

#表示把src/main/cpp加入到include目录，这样在代码中使用：#include <...>就能访问到头文件

include_directories(src/main/cpp)

#添加两个预编译库

add_library(# Sets the name of the library.

        openssl-crypto

        # Sets the library as a static library.

        STATIC

        IMPORTED)

set_target_properties(

        # Specifies the target library.

        openssl-crypto

        # Specifies the parameter you want to define.

        PROPERTIES IMPORTED_LOCATION

        # Provides the path to the library you want to import.

        ${CMAKE_SOURCE_DIR}/src/main/cpp/libs/${ANDROID_ABI}/libcrypto.a)

add_library(# Sets the name of the library.

        openssl-ssl

        # Sets the library as a static library.

        STATIC

        IMPORTED)

set_target_properties(

        # Specifies the target library.

        openssl-ssl

        # Specifies the parameter you want to define.

        PROPERTIES IMPORTED_LOCATION

        # Provides the path to the library you want to import.

        ${CMAKE_SOURCE_DIR}/src/main/cpp/libs/${ANDROID_ABI}/libssl.a)

5、修改CMakeList.txt文件最后的target_link_libraries如下：

target_link_libraries( # Specifies the target library.

        native-lib

        # Links the target library to the log library

        # included in the NDK.

        ${log-lib} openssl-ssl openssl-crypto)

6、修改native-lib.cpp返回openssl版本信息

7、启动app可以看到如下显示结果：