Android Studio 2.2 NDK开发环境搭建

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本文主要讲解如何在Android Studio 2.2下如何一步步搭建NDK开发环境。

本文出自:【HansChen的博客 http://blog.csdn.net/shensky711】

下载NDK和工具

Android Studio2.2开始推荐开发者使用CMake去构建本地代码，在构建之前，我们需先安装下面三个依赖：

NDK: a set of tools that allows you to use C and C++ code with Android.
CMake: an external build tool that works alongside Gradle to build your native library. You do not need this component if you only plan to use ndk-build.
LLDB: the debugger Android Studio uses to debug native code.

这里写图片描述

我们可以使用SDK Manager进行下载，菜单位置：Tools > Android > SDK Manager，勾选后安装即可

创建或者导入native项目

创建工程

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在这里要注意勾选这个Include C++ Support

接下来一路next最后finish，工程就创建好了。创建好之后系统默认生成了个demo。在Android Studio2.2下，目录结构发生了变化

这里写图片描述
所有c/c++文件都应放置在src/main/cpp/目录（以前是在jni目录）

配置build.gradle

<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">android {    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span>    defaultConfig {        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span>        externalNativeBuild {            cmake {                //设置编译工具链                arguments <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"-DANDROID_TOOLCHAIN=clang"</span>                //需编译生成的ABI类型                abiFilters <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'x86'</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'x86_64'</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'armeabi'</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'armeabi-v7a'</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'arm64-v8a'</span>            }        }        ndk {            //打包进APK的ABI类型            abiFilters <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"armeabi"</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"armeabi-v7a"</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"x86"</span>        }    }    externalNativeBuild {        cmake {            //配置CMakeLists.txt的路径            path <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'CMakeLists.txt'</span>        }    }    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span>}</code><ul class="pre-numbering" style="box-sizing: border-box; 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padding: 0px 5px;">30</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; 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padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li></ul>

这里写图片描述
配置之后，我们就会发现工程终于变成这种结构了，其中cpp里面的是源文件，External Build Files是CMakeLists文件。

当然，想要正常编译，我们还需要学习CMake文件，这里推荐一篇文章：CMake 入门实战

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