title: How to display and set click event on Back Arrow on Toolbar?
body: <p><a href="https://i.stack.imgur.com/iJ5BW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/iJ5BW.png" alt="Back button on toolbar"></a></p>
  
  <p>How can I set back arrow in Android toolbar and also apply click listener?</p>