title: How to make launch activity always as home activity
body: <p>I have 3 activities in my app. A is the launcher activity, when I press on a button Activity B will be started, then I have a button to start Activity A or I can press back button and I can go to A. On back press previous values retained in and on button click new values will be set on A. </p>
  
  <p>When I click a button in B , A will be started, I am using <strong>REORDER TO FRONT</strong> flag and singletop as launch mode. New activity is not getting created . When I press back button on A it will transit to B and again I press back button app exits. I want to have activity A on back press on B. I cannot do  anything in <code>onBackpressed()</code> in B as B is used in several scenarios apart from the above mentioned scenario. How to manage it.</p>