Sign Android applications for release in Google Play (Android Market)

With the help of eclipse we can easily create sign apk for release.

Check following links for sign apk using eclipse and also with special command.

http://techdroid.kbeanie.com/2010/02/sign-your-android-applications-for.html


http://developer.android.com/tools/publishing/app-signing.html

Simple steps:
1. Export apk from Eclipse.
2. Create new keystore. If you have alredy keystore then reuse that.
3. After created sign apk. we need to check this apk sign or not.
    use following jarsigner command to check details of authour.
  

jarsigner -verify -verbose -certs ranjitApp.apk

4. Next command is zipalign for compress your sign apk.

zipalign -v 4 your_project_name-unaligned.apk ranjitApp.apk