title: Draw line between menu items
body: <p>I am not using a navigation drawer . 
  I only am using a menu.xml and i want to draw a line separating between these items. 
  I am sure that the line is drawn but i think its color is white so i cannot see it , how can i change its color? 
  Thank you </p>
  
  <pre><code>&lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
      tools:context="com.orangelabs.crypto.blindstorage.android.poc.HomeActivity"&gt;
  
  
      &lt;group android:checkableBehavior="none"
          android:id="@+id/group1"&gt;
      &lt;item android:id="@+id/action_disconnect"
          android:title="@string/action_disconnect"
          app:showAsAction="never"/&gt;
      &lt;item android:id="@+id/action_upload"
          android:title="@string/action_upload"
          app:showAsAction="never"&gt;
  
      &lt;menu&gt;
          &lt;item android:id="@+id/action_chiffre"
              android:title="@string/action_chiffre"
              app:showAsAction="never"/&gt;
          &lt;item android:id="@+id/action_non_chiffre"
              android:title="@string/action_non_chiffre"
              app:showAsAction="never"/&gt;
      &lt;/menu&gt;
  &lt;/item&gt;
  
      &lt;item android:id="@+id/action_create_folder"
          android:title="@string/action_create_folder"
          app:showAsAction="never"/&gt;
  &lt;/group&gt;
      &lt;group android:checkableBehavior="none"
          android:id="@+id/group2"&gt;
          &lt;item android:id="@+id/action_logs"
              android:title="@string/a_propos"
              app:showAsAction="never"/&gt;
  
      &lt;/group&gt;
  
  
  &lt;/menu&gt;
  </code></pre>