a.安装JDK环境
centos linux JAVA(openjdk)软件包名
1.java-1.7.0-openjdk （OpenJDK Runtime Environment）
2.java-1.7.0-openjdk-devel （OpenJDK Development Environment）
yum install java-1.7.0-openjdk java-1.7.0-openjdk-devel
坑1： 之前因为没有装”java-1.7.0-openjdk-devel”，所以系统里只有jre而没有jdk。后续在执行gradle命令时一直报错
Could not find tools.jar. Please check that /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.111-0.b15.el6_8.x86_64/jre contains a valid JDK installation.
后再重新安装了 java-1.7.0-openjdk java-1.7.0-openjdk-devel之后，问题解决。
b.下载androidSdk
cd /opt mkdir androidSdk wget https://dl.google.com/android/repository/sdk-tools-linux-3859397.zip unzip sdk-tools-linux-3859397.zip
b-1. 配置环境变量
#vim /etc/profile
export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL
export PATH=$PATH:/opt/androidSdk/tools/bin
#source /etc/profile
b-2. 查看已安装信息
sdkmanager --list ...... system-images;a...pis;armeabi-v7a | 6 | Google APIs ARM EABI v7a Syste... system-images;a...google_apis;x86 | 6 | Google APIs Intel x86 Atom Sys... system-images;a...gle_apis;x86_64 | 6 | Google APIs Intel x86 Atom_64 ... system-images;a...;android-tv;x86 | 3 | Android TV Intel x86 Atom Syst... system-images;a...ndroid-wear;x86 | 1 | Android Wear Intel x86 Atom Sy... system-images;a...google_apis;x86 | 4 | Google APIs Intel x86 Atom Sys... system-images;a...s_playstore;x86 | 4 | Google Play Intel x86 Atom Sys... tools | 26.0.2 | Android SDK Tools Available Updates: ID | Installed | Available ------- | ------- | ------- tools | 26.0.1 | 26.0.2
安装需要的包，如：
sdkmanager "build-tools;26.0.2"
坑2：通过这种方法默认安装的platform-tools 下载的是26，在使用adb命令时一直报如下的错：
升级lib库无效后，想到可以下载低版本的platform-tools，此问题解决。
platform tools下载地址 http://downloads.puresoftware.org/files/android/platform-tools/
c.配置环境变量 vim /etc/profile
... export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL export PATH=$PATH:/opt/androidSdk/tools/bin export PATH=$PATH:/opt/androidSdk/platform-tools ...
然后执行更新生效
#source /etc/profile
d.执行adb命令
-bash: /opt/androidSdk/platform-tools/adb: /lib/ld-linux.so.2: bad ELF interpreter: 没有那个文件或目录 原来是因为系统的问题，因为我的系统是64位的，那adb这个程序是32位的 解决方案： yum install glibc.i686 yum install libstdc* yum install libstdc++.so.6
坑3： install的过程中一直报错：
错误： Multilib version problems found. This often means that the root cause is something else and multilib version checking is just pointing out that there is a problem. Eg.: 1. You have an upgrade for nss-softokn-freebl which is missing some dependency that another package requires. Yum is trying to solve this by installing an older version of nss-softokn-freebl of the different architecture. If you exclude the bad architecture yum will tell you what the root cause is (which package requires what). You can try redoing the upgrade with --exclude nss-softokn-freebl.otherarch ... this should give you an error message showing the root cause of the problem. 2. You have multiple architectures of nss-softokn-freebl installed, but yum can only see an upgrade for one of those arcitectures. If you don't want/need both architectures anymore then you can remove the one with the missing update and everything will work. 3. You have duplicate versions of nss-softokn-freebl installed already. You can use "yum check" to get yum show these errors. ...you can also use --setopt=protected_multilib=false to remove this checking, however this is almost never the correct thing to do as something else is very likely to go wrong (often causing much more problems). Protected multilib versions: nss-softokn-freebl-3.14.3-900.23.3.el6.x86_64 != nss-softokn-freebl-3.14.3-22.el6_6.i686
试过想删除这个冲突库，然后再重新install “nss-softokn-freebl-3.14.3-900.23.3.el6.x86_64”
但是删除掉之后引发了很多系统问题，如yum，ssh，vim等命令均不支持。 强烈建议大家不要乱删库啊，血和泪的教训啊 ~~~
系统恢复后，发现其实错误信息里已经给出了很直接的忽略检查的参数，直接用就好了。。
yum install glibc.i686 --setopt=protected_multilib=false
安装成功~~ 问题解决。
再次运行adb命令 ~~ 成功~