title: How can I remove white spaces around an ImageButton?
body: <p>How can I remove the white spaces around these ImageButtons?</p>
  <p><a href="https://i.stack.imgur.com/CxVVa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CxVVa.png" alt="ImageButtons" /></a></p>
  <p>This is sample code for one one of the ImageButton:</p>
  <pre><code>&lt;ImageButton
          android:id=&quot;@+id/imageButton3&quot;
          android:layout_width=&quot;64dp&quot;
          android:layout_height=&quot;56dp&quot;
          android:src=&quot;@drawable/ic_circulo&quot;
          app:layout_constraintBottom_toTopOf=&quot;@+id/imageButton2&quot;
          app:layout_constraintStart_toStartOf=&quot;parent&quot; /&gt;
  </code></pre>
  <p>Thanks in advance.</p>