title: How can I show two activities at a time in android
body: <p>I have 2 activities, In first activity I have a button and I want when user clicks or move up that button the second activity come from bottom and stop when it goes to the half of the screen. I don't understand how can I achieve this. I also searched google but they show some type of dialog boxes :(. 
  <a href="https://i.stack.imgur.com/8xYOA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8xYOA.png" alt="enter image description here"></a></p>
  
  <p>This is what I want. When app start 1st activity is shown on the screen but when user click <strong>^</strong> this button both 2 activities show 50% on the screen. 
  Can anybody tell me how can I achieve this. Is it possible???</p>