title: How to increase icon size in android bottom navigation layout?
body: <p>I am using the bottom layout navigation style in android that was recently introduced by google in design library 25. In all the tutorials and questions i see, the images in their icons are a normal size, but mine are extra small, despite the fact that the image I'm saving to drawable folder is 72x72. Here is a screenshot:</p>
  
  <p><a href="https://i.stack.imgur.com/6HgS5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6HgS5.png" alt="enter image description here"></a></p>
  
  <p>The icons should be at least 2, maybe even 3 times that size. How can I do it? Here is my code in my bottom_layout.xml:</p>
  
  <pre><code>  &lt;?xml version="1.0" encoding="utf-8"?&gt;
  
   &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
  
     xmlns:app="http://schemas.android.com/apk/res-auto"&gt;
    &lt;item
      android:id="@+id/menu_home"
      android:title="test"
      android:icon="@drawable/tabbarglossary"
      app:showAsAction="always|withText"
      /&gt;
    &lt;item
      android:id="@+id/menu_search"
      android:title="test2"
      android:icon="@drawable/mediationtabbar"
      app:showAsAction="always|withText"
      /&gt;
  
    &lt;item
      android:id="@+id/menu_notifications"
      android:title="test3"
      android:icon="@drawable/ic_action_name"
      app:showAsAction="always|withText"
      /&gt;
  
  &lt;/menu&gt;
  </code></pre>
  
  <p>and in my activity_main.xml:</p>
  
  <pre><code> &lt;android.support.design.widget.BottomNavigationView
      android:id="@+id/navigation"
      android:layout_width="match_parent"
      android:layout_height="80dp"
      android:layout_alignParentBottom="true"
      android:layout_gravity="bottom"
      android:layout_marginBottom="0dp"
      android:layout_marginLeft="0dp"
      android:layout_marginRight="0dp"
      android:focusable="false"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toRightOf="parent"
      design:menu="@menu/bottom_layout" /&gt;
  </code></pre>
  
  <p>Thanks</p>