title: Having application running above other app
body: <p>I want to make an activity that can be opened above ANY app.</p>
  
  <p>Normally, even when the activity is set as dialog, when you switch to my app, you see my app, and in the background you see the launcher:</p>
  
  <p><img src="https://i.stack.imgur.com/etylT.png" alt=""></p>
  
  <p>BUT, I want the app will go above any app like this: (made in photoshop):</p>
  
  <p><img src="https://i.stack.imgur.com/ss9hx.png" alt=""></p>
  
  <p>I did see this question <a href="https://stackoverflow.com/questions/4481226/creating-a-system-overlay-always-on-top-button-in-android">Creating a system overlay window (always on top)</a>, but in ICS there is no functionallity to the layout.
  Furthermore, I want to give a dialog box from my app without minimizing the other app...</p>