Publishing Your Android App

To publish your apps on Android Market/Google Play, you need to sign your app with your digital certificate. (During development, you app is signed using a debug certificate by the Eclipse ADT.)

Signing Android Apps

1. From Eclipse, right-click on the project ⇒ Export... ⇒ Android ⇒ Export Android Application.
2. In "Project Checks" dialog ⇒ Next.
3. In "Keystore selection" ⇒ Create new keystore ⇒ In "Location", enter the filename for the keystore (e.g., keystore.db) ⇒ set your password for the keystore.
4. In "Key creation", enter the data ⇒ Finish.

References:

1. Signing Your Applications @ http://developer.android.com/tools/publishing/app-signing.html.
2. For keystore management, read JDK documentation on "keytool - Key and Certificate Management Tool".

Publish the android app in play store have some limitation:

1. Need to change the package name for every Corporate because in Google play store have assign the unique key for application package.

http://stackoverflow.com/questions/17807784/is-it-possible-to-publish-multiple-applications-in-play-store-with-same-api-key

2. Play store don't allow content that harms, interferes with the operation of, or accesses in an unauthorized manner, networks, servers, or other infrastructure

Google Play Developer Program Policies