title: How to have toolbar icon the way whatsapp has in android
body: <p>I am trying put image exactly with the back button of toolbar. But i don't know how to achieve it. The closest i got was this :</p>
  
  <p><a href="https://i.stack.imgur.com/bwBef.png" rel="noreferrer"><img src="https://i.stack.imgur.com/bwBef.png" alt="enter image description here"></a>
  but this is not nearly what i want. I want it exactly with the back button meaning that the back button and the image combined should be equal to the back button. So how do i achieve this??</p>
  
  <p><a href="https://i.stack.imgur.com/LoB3J.png" rel="noreferrer"><img src="https://i.stack.imgur.com/LoB3J.png" alt="enter image description here"></a></p>
  
  <p>my code was pretty simple :</p>
  
  <pre><code>getSupportActionBar().setDisplayHomeAsUpEnabled(true);
  setSupportActionBar(toolbar);
  toolbar.setLogo(ContextCompat.getDrawable(mContext, R.drawable.group_image));
  </code></pre>
  
  <p>So can someone please help me.</p>