If you mean the APK for debugging on Android, I wouldn't worry. Once you have your project setup, plugging your phone in will make Eclipse automatically upload and run the APK on your phone.
The Android project in your workspace will generate the APK in \bin. In my case, I had a
game-core project and an
android-specific project, and my APK shows up in
Edit: since you mentioned deploying your app to the store, you need to sign it. Detailed instructions here here on their wiki:
- Right click your Android project and select "Export"
- Select "Android -> Export Android Application"
- Make sure the project you want to export is your project, select next
- Select or create your keystore. If you are new to Android development, a keystore is used to sign your applications and is required for putting your application on the market. More information is available at: http://developer.android.com/tools/publishing/app-signing.html
- Select your alias to sign with and enter the password. If you don't have an alias or want to create a new alias, select create new key and select next.
- Now select the destination of where you want your app being exported to. This will export an .apk file in the selected directory capable of being uploaded to Google Play (formerly Android Market) and alternative app stores.
- Select finish and your .apk will be built!