$ ionic info

cli packages: (C:\Users\Jane\AppData\Roaming\npm\node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 8.0.0

local packages:

    @ionic/app-scripts : 3.1.9
    Cordova Platforms  : android 7.0.0
    Ionic Framework    : ionic-angular 3.9.2

System:

    Android SDK Tools : 26.1.1
    Node              : v6.11.3
    npm               : 2.15.12
    OS                : Windows 10

Environment Variables:

    ANDROID_HOME : C:\Users\Jane\AppData\Local\Android\Sdk

Misc:

    backend : pro