Changing overflow icon in the action bar

No matter what I tried to do in styles.xml, none of the solutions worked for me. In the end, if you have AppCompat 23+, which you should, this is the easiest way that actually works:

toolbar.setOverflowIcon(drawable);

1. Change your custom overflow icon of Actionbar in styles.xml.

    <resources>
       <!-- Base application theme. -->
       <style name=“MyTheme" parent="@android:style/Theme.Holo">
          <!-- Pointer to Overflow style DONT forget! -->
          <item name="android:actionOverflowButtonStyle">@style/MyOverFlow</item>
       </style>
   
       <!-- Styles -->
       <style name="MyOverFlow" parent="@android:style/Widget.Holo.ActionButton.Overflow">
           <item name="android:src">@drawable/ic_your_action_overflow</item>
       </style>
    </resources>
   

2. Put custom theme "MyTheme" in application tag of AndroidManifest.xml

   <application
       android:name="com.example.android.MainApp"
       android:theme="@style/AppTheme">
   </application>
   

Have fun.@.@

For those who can't get it to work try this WITHOUT the "android:" namespace.

<item name="actionOverflowButtonStyle">@style/OverFlow</item>

You can with a style, but you have to add it to the main Theme declaration.

<resources>
    <!-- Base application theme. -->
    <style name="Your.Theme" parent="@android:style/Theme.Holo">
        <!-- Pointer to Overflow style ***MUST*** go here or it will not work -->
        <item name="android:actionOverflowButtonStyle">@style/OverFlow</item>
    </style>

    <!-- Styles -->
    <style name="OverFlow" parent="@android:style/Widget.Holo.ActionButton.Overflow">
        <item name="android:src">@drawable/ic_action_overflow</item>
    </style>

</resources>

You also can change it dynamically, which I go into detail about here:

Changing the Android Overflow menu icon programmatically