change action bar widget theme

        <item name="android:icon">@android:color/transparent</item>

    </style>

    <style name="actionBarWidgetTheme" parent="@android:style/Theme.Holo.Light.DarkActionBar">

    <style name="actionBarWidgetTheme" parent="@android:style/Theme.Holo">

        <item name="android:textColorHint">#80ffffff</item>

        <item name="android:textColor">#ffffffff</item>

        </style>

    <style name="task_progressbar" parent="android:Widget.Holo.ProgressBar.Horizontal"></style>