How to increase icon size in android bottom navigation layout? : <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>
