title: Opening the activity on top of another like Popup with some part visible of first activity
body: <p>I have an application in which my requirement is to show Home screen and then if any button is clicked open another activity in Popup(Which means remaining part of first activity will be visible but not click-able) and if any button is clicked in the second activity launch the third activity same as second.</p>
  
  <p>Also I am not looking for setting in manifest: <strong>@android:style/Theme.Dialog</strong><img src="https://i.stack.imgur.com/uKB4T.png" alt="enter image description here"></p>
  
  <p>In the image you can see a pop up and a parent screen behind that popup.Please help me to solve this. I have to open an activity on top of another activity with some part of previous visible.
  Thanks in advance.</p>