1. First, download the android-sdk toolkit, links https://www.androiddevtools.cn/
what is missing what download
after download should pack 
2. environment variable configuration
2.1 New ANDROID_HOME environment variables, you add the value of the variable sdk download the position
I was E: \ android_SDK \ android-sdk -windows.
2.2 path variable value of the newly added tool download directory platform-tools directory and tools are tools sdk directory
3.cmd enter adb see if the environment is configured successfully, as can occur
