ActionBar的定制

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/action_search"
        android:actionViewClass="android.widget.SearchView"
        android:icon="@drawable/actionbar_search_icon"
        android:showAsAction="ifRoom|collapseActionView"
        android:title="@string/action_search"/>
 
    <item
        android:id="@+id/action_group_chat"
        android:icon="@drawable/menu_group_chat_icon"
        android:title="@string/menu_group_chat"/>
    <item
        android:id="@+id/action_add_friend"
        android:icon="@drawable/menu_add_icon"
        android:title="@string/menu_addfriend"/>
    <item
        android:id="@+id/action_scan"
        android:icon="@drawable/men_scan_icon"
        android:title="@string/menu_scan"/>
    <item
        android:id="@+id/action_feedback"
        android:icon="@drawable/menu_feedback_icon"
        android:title="@string/menu_feedback"/>
</menu>

getActionBar().setDisplayShowHomeEnabled(false);

private void setOverflowButtonAlways(){
	try{
		ViewConfiguration config = ViewConfiguration.get(this);
		Field menuKey = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
		menuKey.setAccessible(true);
		menuKey.setBoolean(config, false);
	} catch (Exception e){
		e.printStackTrace();
	}
}

@Override
public boolean onMenuOpened(int featureId, Menu menu){
	if (featureId == Window.FEATURE_ACTION_BAR && menu != null){
		if (menu.getClass().getSimpleName().equals("MenuBuilder")){
			try{
				Method m = menu.getClass().getDeclaredMethod("setOptionalIconsVisible", Boolean.TYPE);
				m.setAccessible(true);
				m.invoke(menu, true);
			} catch (Exception e){
				e.printStackTrace();
			}
		}
	}
	return super.onMenuOpened(featureId, menu);
}

<resources xmlns:android="http://schemas.android.com/apk/res/android">
    <style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
        <item name="android:actionOverflowButtonStyle">@style/weixinActionOverflowButtonStyle</item>
    </style>
    <style name="weixinActionOverflowButtonStyle">
        <item name="android:src">@drawable/actionbar_add_icon</item>
    </style>
</resources>