title: How to reduce time in switching from one activity to another?
body: <p>Our team has made this app which sends SOS with coordinates (latitudes,longitudes) to the family members. Basically what we are doing is accessing the contacts list, adding some into list to send the sms to.
  What we need is a technique to reduce the time spent is switching from one activity to another, thus making UI smooth.
  Thanks</p>