Make apk file or build apk file or build in apk file

1. Install android studio version 2.3.2
2. Install jdk "jdk-8u161-windows-x64.exe"
3. Configuration in
     My Computer> Properties>Advance system settings>Advance>Environment Variables>
   System  variables    
   Variable                      Values
   ANDROID_HOME    C:\Users\OMG\AppData\Local\Android\Sdk
   JAVA_HOME             C:\Program Files\Java\jdk1.8.0_161
   Path                             C:\Program Files\Java\jdk1.8.0_161\bin

   User  variables
   User              variables
   PATH            %JAVA_HOME%\bin
                         %ANDROID_HOME%\tools
                         %ANDROID_HOME%\platform-tools



4. Add android Platform in Ionic
    >ionic cordova platform add android

5. Build android apk file or generate apk file
    >ionic cordova build android