You can use something like this
<style name="MyTheme" parent="android:style/Theme.Holo.Light">
<item name="android:actionOverflowButtonStyle">@style/MyActionButtonOverflow</item>
</style>
<style name="MyActionButtonOverflow" parent="android:style/Widget.Holo.ActionButton.Overflow">
<item name="android:src">@drawable/my_action_bTutton_overflow</item>
</style>
in your AndroidManifest.xml
<application
android:theme="@style/MyTheme" >
If you want to change actionBar color
@style/MyActionBar
<!-- Support library compatibility -->
<item name="actionBarStyle">@style/MyActionBar</item>
</style>
<!-- ActionBar styles -->
<style name="MyActionBar" parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
<item name="android:background">@color/app_theme_color</item>
<!-- Support library compatibility -->
<item name="background">@color/app_theme_color</item>
<item name="android:alwaysDrawnWithCache">true</item>
<item name="android:displayOptions">showTitle|showHome|homeAsUp</item>
<item name="android:icon">@android:color/transparent</item>
</style>
Then in your AndroidManifest.xml
you need to refer this one inside your application
tag.
android:theme="@style/CustomActionBarTheme"
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