* In ADT, right click on project
Android tools ->Export signed Application Package->Project checks->select project to be exported by clicking on browse->click Next->create new keystore->enter the location for your apk for example test.apk(create a new folder for storing your signed apk )->enter password and confirm->click next and type all the details in key creations dialog. validity should be minimum 25 years->save
Signed apk will be created. Retain the keystore file for further updates of the application. Playstore will not accept any other keystore file.
Using developer account, after entering all the details and snapshots of the application, it could be published.
