你需要下载NDK。
The NDK release used in this tutorial is r4b.
本教程使用的NDK版本是r4b。
Learn how to install the Android NDK and begin using it.
学习如何安装AndroidNDK并开始使用它。
Download the NDK for your operating system from the Android site.
从Android网站下载适合你的操作系统的NDK。
The Release Notes detail all the improvements and bug fixes coming in NDK r7.
发布声明详述了所有改进和由ndkr7引入的Bug修复。
Selected system libraries will gradually be added to the set of stable NDK APIs.
所选择的系统库将逐渐添加到稳定NDKAPI集合中。
This has an interesting implication: an NDK solution will not work on all devices.
这其中有很有意思的潜在状况：NDK解决方案无法适用于所有的设备。
The tutorial begins with a high-level look at the NDK and its common usage scenarios.
本教程以NDK及其常用场景的概述开始。
You will also learn how to extend the Eclipse build environment to integrate an NDK project into an Android SDK project file.
您还将学习如何扩展Eclipse构建环境以将NDK项目集成到AndroidSDK项目文件中。
One of the motivations for exploring the NDK in the first place is the opportunity to leverage open source projects, many of which are written in C.
首先，了解 Android 原生开发工具包（NDK）的动机之一是得以利用开源项目，大多数项目都是用C 语言编写的。
However, we'd like to take a moment to talk about why the NDK is important, when it should be used, and-just as importantly, when it should not be used.
不过，我们想要花点时间讨论一下NDK为什么那么重要、何时该使用它，以及——同等重要的，何时不该使用它。
However, we'd like to take a moment to talk about why the NDK is important, when it should be used, and-just as importantly, when it should not be used.
不过，我们想要花点时间讨论一下NDK为什么那么重要、何时该使用它，以及——同等重要的，何时不该使用它。
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