在Windows下使用Eclipse及Sequoyah开发Android JNI项目工程

一、搭建 Android 开发环境

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二、搭建 JNI 开发环境

1、工具准备

a、CDT 插件（c/c++编辑器及工具）

b、Sequoyah 插件（Android 项目增加 c/c++ nature）

2、工程配置

a、增加 native 支持

What is JNI? !JNI is a set of specifications/framework that allows Java code to call C/C++ native code. !In Android world, JNI is

supported through the!Android NDK . You still need to use Java to call the Native Interfaces, but you can code most of you app

in C. !

Why use JNI? !I can think of two obvious answers:

1. Execution speed (Java is almost always slower than C and it is easier to optimize C code than Java code). !

2. Porting from a large C/C++ code-base (for code reusability and to save time).

Most NDI techniques requires the use of command-line and some sort of Linux shell. !Luckily as Android matures, there are

several plug-ins that simplifies this. !The one thing that I really!dreaded was using command-lines every time I have to recompile

the C code, so I had stayed away from the NDK for a while. !But if you are brave enough here’s a link to the

documentation:!http://developer. android .com/sdk/ndk/overview.html .

I recommend starting out with a fresh Eclipse install to avoid additional headache altogether.

Setting Up The Development Environment

1. Install Eclipse

I am using Eclipse!Indigo!for this guide. !I’m running Windows 7. Here’s the Eclipse About box in case you need it for reference:

Eclipse SDK

Version: 3.7.0

Build id: I20110613-1736

(c) Copyright Eclipse contributors and others 2000, 2011. !All rights reserved.

Visit http://www.eclipse.org/platform

This product includes software developed by the

Apache Software Foundation http://www.apache.org/

This is one plug-in that you need in order to avoid the Command Line stuff. !The!Sequoyah Android!plug ins is awesome, so

download it from the update site (I used !http://download.eclipse.org/sequoyah/updates/2.0/). !You must uncheck!Group Items

By Category!checkbox (can be seen in the bottom half of the picture below) to see the available components and then just

select them all (I am not sure which one is really needed, but I didn’t want really care since there’s no harm installing all).

Once you have Sequoyah installed, I recommend checking out the Sequoyah User Guide section in the Eclipse Help menu at

some point because it contains some useful information, some which helped me throughout the way of getting the process