支持多平台、多语言
appium是跨平台的，可以用在OSX，Windows以及Linux桌面系统上运行。
appium选择了Client/Server的设计模式。只要client能够发送http请求给server，那么的话client用什么语言来实现都是可以的，这就是appium及Selenium(WebDriver)如何做到支持多语言的原因；
appium扩展了WebDriver的协议，没有自己重新去实现一套。
这样的好处是以前的WebDriver API能够直接被继承过来，以前的Selenium（WebDriver）各种语言的binding都可以拿来就用，省去了为每种语言开发一个client的工作量；
方式一 npm install -g appium --registry=https://registry.npm.taobao.org
方式二 安装appium-desktop桌面版（https://github.com/appium/appium-desktop/releases）
2、安装appium-doctor2.1 Android
MacBookPro:redis-4.0.9 zhangxm$ appium-doctor --android
info AppiumDoctor Appium Doctor v.1.15.3
info AppiumDoctor ### Diagnostic for necessary dependencies starting ###
info AppiumDoctor ✔ The Node.js binary was found at: /usr/local/bin/node
info AppiumDoctor ✔ Node version is 12.16.0
info AppiumDoctor ✔ ANDROID_HOME is set to: /Users/zhangxm/Library/Android/sdk
info AppiumDoctor ✔ JAVA_HOME is set to: /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home
info AppiumDoctor Checking adb, android, emulator
info AppiumDoctor 'adb' is in /Users/zhangxm/Library/Android/sdk/platform-tools/adb
info AppiumDoctor 'android' is in /Users/zhangxm/Library/Android/sdk/tools/android
info AppiumDoctor 'emulator' is in /Users/zhangxm/Library/Android/sdk/emulator/emulator
info AppiumDoctor ✔ adb, android, emulator exist: /Users/zhangxm/Library/Android/sdk
info AppiumDoctor ✔ Bin directory of $JAVA_HOME is set
info AppiumDoctor ### Diagnostic for necessary dependencies completed, no fix needed. ###
info AppiumDoctor
info AppiumDoctor ### Diagnostic for optional dependencies starting ###
WARN AppiumDoctor ✖ opencv4nodejs cannot be found.
WARN AppiumDoctor ✖ ffmpeg cannot be found
WARN AppiumDoctor ✖ mjpeg-consumer cannot be found.
WARN AppiumDoctor ✖ bundletool.jar cannot be found
WARN AppiumDoctor ✖ gst-launch-1.0 and/or gst-inspect-1.0 cannot be found
info AppiumDoctor ### Diagnostic for optional dependencies completed, 5 fixes possible. ###
info AppiumDoctor
info AppiumDoctor ### Optional Manual Fixes ###
info AppiumDoctor The configuration can install optionally. Please do the following manually:
WARN AppiumDoctor ➜ Why opencv4nodejs is needed and how to install it: https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/image-comparison.md
WARN AppiumDoctor ➜ ffmpeg is needed to record screen features. Please read https://www.ffmpeg.org/ to install it
WARN AppiumDoctor ➜ mjpeg-consumer module is required to use MJPEG-over-HTTP features. Please install it with 'npm i -g mjpeg-consumer'.
WARN AppiumDoctor ➜ bundletool.jar is used to handle Android App Bundle. Please read http://appium.io/docs/en/writing-running-appium/android/android-appbundle/ to install it
WARN AppiumDoctor ➜ gst-launch-1.0 and gst-inspect-1.0 are used to stream the screen of the device under test. Please read https://appium.io/docs/en/writing-running-appium/android/android-screen-streaming/ to install them and for more details
info AppiumDoctor
info AppiumDoctor ###
info AppiumDoctor
info AppiumDoctor Bye! Run appium-doctor again when all manual fixes have been applied!
info AppiumDoctor
opencv4nodejs
第一步：安装cmake并配置环境变量
1、打开terminal执行：cmake —version，提示未安装
2、安装cmake步骤：
CMake http://www.cmake.org/
我是下载的CMake的dmg文件，图形界面安装，但安装完后在命令行中运行不了cmake命令，需要将cmake命令添加到环境变量中。
（1）打开 .bash_profile 文件配置环境变量，终端输入 open -e .bash_profile
打开的文件加入下面两句，保存修改即可。
# Add Cmake Root to Path
export CMAKE_ROOT=/Applications/CMake.app/Contents/bin/（你自己的安装目录）
export PATH=$CMAKE_ROOT:$PATH
（2）更新刚配置的环境变量：
输入source .bash_profile
（3）再次执行cmake —version，提示安装成功
第二步、执行：npm -g install opencv4nodejs
等待安装完成，则看到已成功安装。
ffmpeg
brew install ffmpeg
mjpeg-consumer
npm install -g mjpeg-consumer
bundletool.jar cannot be found
到https://github.com/google/bundletool/releases下载bundletool.jar的最新版本，下载到的这个jar的文件名可能有带版本号，无论是什么，都改名为bundletool.jar。
在前面创建的sdk目录下，创建一个子目录bundle-tool，把bundletool.jar放在这个子目录下。
给这个子目录和这个jar文件，增加权限。执行下面的脚本：
chmod +x
chmod +x bundletool.jar
在全局变量PATH中，增加bundletool.jar的路径，如下所示：
expert PATH=${PATH}:$ANDROID_HOME/bundle-tool
gst-launch-1.0
brew install gstreamer gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugly gst-libav
2.2 IOS
MacBookPro:bundle-tool zhangxm$ appium-doctor --ios
info AppiumDoctor Appium Doctor v.1.15.3
info AppiumDoctor ### Diagnostic for necessary dependencies starting ###
info AppiumDoctor ✔ The Node.js binary was found at: /usr/local/bin/node
info AppiumDoctor ✔ Node version is 12.16.0
info AppiumDoctor ✔ Xcode is installed at: /Applications/Xcode.app/Contents/Developer
info AppiumDoctor ✔ Xcode Command Line Tools are installed in: /Applications/Xcode.app/Contents/Developer
info AppiumDoctor ✔ DevToolsSecurity is enabled.
info AppiumDoctor ✔ The Authorization DB is set up properly.
info AppiumDoctor ✔ Carthage was found at: /usr/local/bin/carthage. Installed version is: 0.23.0
info AppiumDoctor ✔ HOME is set to: /Users/zhangxm
info AppiumDoctor ### Diagnostic for necessary dependencies completed, no fix needed. ###
info AppiumDoctor
info AppiumDoctor ### Diagnostic for optional dependencies starting ###
WARN AppiumDoctor ✖ opencv4nodejs cannot be found.
info AppiumDoctor ✔ ffmpeg is installed at: /usr/local/bin/ffmpeg. ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
info AppiumDoctor ✔ mjpeg-consumer is installed at: /usr/local/lib. Installed version is: 2.0.0
WARN AppiumDoctor ✖ set-simulator-location is not installed
WARN AppiumDoctor ✖ idb and idb_companion are not installed
WARN AppiumDoctor ✖ applesimutils cannot be found
info AppiumDoctor ✔ ios-deploy is installed at: /usr/local/bin/ios-deploy. Installed version is: 1.9.1
info AppiumDoctor ### Diagnostic for optional dependencies completed, 4 fixes possible. ###
info AppiumDoctor
info AppiumDoctor ### Optional Manual Fixes ###
info AppiumDoctor The configuration can install optionally. Please do the following manually:
WARN AppiumDoctor ➜ Why opencv4nodejs is needed and how to install it: https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/image-comparison.md
WARN AppiumDoctor ➜ set-simulator-location is needed to set location for Simulator. Please read https://github.com/lyft/set-simulator-location to install it
WARN AppiumDoctor ➜ Why idb is needed and how to install it: https://github.com/appium/appium-idb
WARN AppiumDoctor ➜ Why applesimutils is needed and how to install it: http://appium.io/docs/en/drivers/ios-xcuitest/
info AppiumDoctor
info AppiumDoctor ###
info AppiumDoctor
info AppiumDoctor Bye! Run appium-doctor again when all manual fixes have been applied!
info AppiumDoctor
set-simulator-location
brew install lyft/formulae/set-simulator-location
ios-deploy
sudo npm install -g ios-deploy —unsafe-perm=true
applesimutils
brew tap wix/brew
brew install applesimutils
idb
brew tap facebook/fb
brew install idb-companion
pip3.7 install fb-idb
pom文件加载需要的java-client包
https://github.com/appium/java-client
How to install latest java client Beta/Snapshots
Java client project is available to use even before it is officially published to maven central. Refer jitpack.io
Maven
Add the following to pom.xml:
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
Add the dependency:
<dependency>
<groupId>com.github.appium</groupId>
<artifactId>java-client</artifactId>
<version>latest commit ID from master branch</version>
</dependency>
