title: Android Button background color not changing
body: <p>In this android project im creating a default button style.
  my styles.xml</p>
  
  <pre><code>&lt;!-- Base application theme. --&gt;
  &lt;style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"&gt;
      &lt;item name="android:buttonStyle"&gt;@style/ButtonStlye123&lt;/item&gt;
  &lt;/style&gt;
  
  &lt;style name="ButtonStlye123" parent="android:style/Widget.Button"&gt;
      &lt;item name="android:textSize"&gt;19dp&lt;/item&gt;
      &lt;item name="android:layout_margin"&gt;8dp&lt;/item&gt;
      &lt;item name="android:padding"&gt;8dp&lt;/item&gt;
      &lt;item name="android:textColor"&gt;@color/ColorDivider&lt;/item&gt;
  
      &lt;item name="android:background"&gt;@color/ColorAccent&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>my button in a fragment.</p>
  
  <pre><code>&lt;Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/btnLogin"
      android:id="@+id/btn_login"
      android:layout_alignParentBottom="true"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"
      android:layout_alignParentRight="true"
      android:layout_alignParentEnd="true"
      android:theme="@style/ButtonStlye123"
      android:onClick="login" /&gt;
  </code></pre>
  
  <p>In the preview in android studio it looks exactly like I want, but when I run the app on my device the background color is gray ("default button color"). If i change the text color in my styles.xml like:</p>
  
  <pre><code>&lt;item name="android:textColor"&gt;@color/ColorPrimary&lt;/item&gt;
  </code></pre>
  
  <p>it changes (also on my device) so the custom style is loading, i tryd different colors (that worked for the text) for the button but it wont change. </p>
  
  <p>Why isnt my background color loading? </p>