title: Android: Create bigger Floating Action Button with bigger icon
body: <p>I want to create a bigger Floating Action Button (FAB), more than the usual 56 dp, with a bigger icon inside.
  (For my purpose an icon will never be self-explanatory so I will create a png-file containing a short text and use this png as icon.)</p>
  
  <p>Increasing the size of the FAB works fine:<br>
  as i don't use the mini-FloatingActionButton, i redefined the mini-button-size.<br>
  in my <strong>layout-xml</strong> i specify: </p>
  
  <pre><code>&lt;android.support.design.widget.FloatingActionButton
      ...
      app:fabSize="mini"
      ....
  </code></pre>
  
  <p>and in the <strong>dimensions.xml</strong> i redefine the size for the mini-fab: </p>
  
  <pre><code>&lt;dimen name="fab_size_mini"&gt;80dp&lt;/dimen&gt;
  </code></pre>
  
  <p>However, I didn't manage to get a bigger icon on the FAB.
  I tried icons with different dp's from the material icons library - no success. Also setting a padding on the FAB-layout did not work.</p>
  
  <p>Any suggestions? Thanks!</p>