Android upgrading app

I have released version 1 of my app. Now I changed my code and added some more functionality. My question is ho开发者_JAVA技巧w to update my app in market. Can anyone just outline the steps to follow because i'm confused about update.zip.

Moreover I'm using eclipse for my project. Is there any straight forward way in eclipse (like export)? Please guide me!

• In your manifest:
  • Change android:versionName to the new visible name
  • increase (important to go up!) android:versionCode
• Build the same .apk as you built when you uploaded app for the first time. Use the same certificate you did the first time
• Upload your .apk using "Upgrade" functionality in market.
• Publish the upgrade

That's it.