Persistence navigation bar on top of all activities
<p>I'm about to start on an Android project. This app needs to have a (navigation) bar that will be always on top and always visible, also when you switch between activities. The bar must be 10 dp from the bottom and the active activity in the background must be visible above and below to the bar. Is there any component to do this with? </p>

<p><em>its lifecycle must remain while switching between activities so it won't slide out of the screen, like the activities do</em></p>

<p>Already tried:
Fragments: Only available for > 3.0
Widgets: View is removed when switching between activities
ActivityGroup: Seems to be a bad way</p>

<p><a href="http://stackoverflow.com/questions/6788198/how-to-create-fixed-navigation-bar-for-all-activities-in-an-android-application">How To Create Fixed Navigation Bar For All Activities In An Android Application</a>
This seems to be the same question, but no correct answer given.</p>
