以gradle环境变量配置为例：
Android Studio 自带的gradle路径为：
/Applications/Android Studio.app/Contents/gradle/gradle-2.8/bin
1.打开终端
2.输入：vim ~/.bash_profile
3.进入编辑模式
4.在文本末尾添加如下信息
export GRADLE_HOME=/Applications/Android Studio.app/Contents/gradle/gradle-2.8
export PATH=${PATH}:${GRADLE_HOME}/bin
5.退出编辑模式，输入:wq退出
6.输入：gradle -v显示如下信息，表明环境变量配置成功
------------------------------------------------------------
Gradle 2.10
------------------------------------------------------------
Build time: 2015-12-21 21:15:04 UTC
Build number: none
Revision: 276bdcded730f53aa8c11b479986aafa58e124a6
Groovy: 2.4.4
Ant: Apache Ant(TM) version 1.9.3 compiled on December 23 2013
JVM: 1.8.0_65 (Oracle Corporation 25.65-b01)
OS: Mac OS X 10.11.1 x86_64