title: how to measure the time taken by activities in android
body: <blockquote>
  <p>I am working on quiz type application and I want to calculate the time between some activities. for example, my level starts from activity A and ends at activity H. I want to calculate the time taken by all the activities. Can anyone please help me to count the time taken from the first activity to the ending activity?</p>
  </blockquote>