title: How to switch between 2 view (map and some activity) and both work together?
body: <p>My app is running recording. If i wanna make 2 page views; </p>
  
  <p>1) record running, when swipe to right it show </p>
  
  <p>2nd page which is map (map also work accompany with recording activity) in addition, when we are at map view, recording activity still work in background.</p>
  
  <p>Which method or function i should look at? now, I have study some about PageAdapter, but, i still have no idea how to make 2 different page which works together.. Do i have to use Fragment? Any suggestion?</p>