title: android image button tooltip
body: <p>I'm trying to build an app with image buttons that work like the action bar but i can't get them to show a tooltip on long press.</p>
  
  <pre><code>   &lt;ImageButton
          android:id="@+id/editUrgent"
          style="?android:attr/borderlessButtonStyle"
          android:layout_width="48dp"
          android:layout_height="wrap_content"
          android:layout_centerVertical="true"
          android:layout_toLeftOf="@+id/editImportant"
          android:hint="@string/hint_urgent"
          android:contentDescription="@string/hint_urgent"
          android:text="@string/hint_urgent"
          android:src="@drawable/clock_light" /&gt;
  </code></pre>
  
  <p>android:contentDescription works for hovering(s-pen) but long press still does nothing.</p>