I want to create a shortcut in an android app, it lead to another activity which is not launcher of the app.
To create the shortcut itself you need a specially crafted activity which must:
This activity will then show up when you longpress your desktop and select "Shortcuts".
Of course the shortcut by itself is not much use, so you must add an intent filter to whatever activity you want to get triggered by the shortcut. The intent filter should match whatever Intent you chose for your shortcut.
I wrote a small how-to on the subject, it's got more details: http://www.kind-kristiansen.no/2010/android-adding-desktop-shortcut-support-to-your-app/
Do tell me if anything is unclear in that post, I'll try to clear it up.