In my application you can navigate through several Activities until the Activity stack is quite deep.
We\'d like a button on every Activity that will take you straig
You could declare that first activity android:launchMode="singleTask" (more) and then just start it with an Intent.
android:launchMode="singleTask"
EDIT: My suggestion is based on the assumption that you want to have a single instance of the Activity to return to. Otherwise it's incorrect.