How to change default Android navigation icon

Question

When I used the following code in AndroidManifest.xml, I was able to get image 2 as shown in the image. I want to replace the arrow with an arrow, as shown in Figure 2,

    <activity
        android:name="lk.gamma.pizzakraft.slidingmenu.Cart"
        android:label="@string/app_name"
        android:parentActivityName="lk.gamma.pizzakraft.slidingmenu.ActivityHome" >
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="lk.gamma.pizzakraft.slidingmenu.ActivityHome" />
    </activity>

Answer 1

 <style name="Theme.MyFancyTheme" parent="android:Theme.Holo">
     <item name="android:homeAsUpIndicator">@drawable/your_icon</item>
 </style>