ActionBarSherlock getCustomView（）在ICS之前的android版本上返回null

我正在使用ABS库开发一个应用程序。在两个片段活动中，我需要使用Actionbar中的自定义视图。我的代码在ICS和JB中工作得很好。但我在姜饼里测试，结果崩溃了

我的代码是下一个：

public class SearchContactActivity extends SherlockFragmentActivity {

    private EditText searchField;
    private ImageButton searchButton;


    @Override
    protected void onCreate(Bundle arg0) {
        super.onCreate(arg0);
        setContentView(R.layout.search_contacts);
        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
        View view = actionBar.getCustomView();//ICS & JB return the View OK, lower versions returns null
        searchField = (EditText) view.findViewById(R.id.editText_search);//here the app crash because view is null
        searchButton = (ImageButton) view.findViewById(R.id.button_search);

    }
}

我的主题XML：

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
    <style name="Theme.Styled.Search" parent="Theme.Sherlock.Light">
       <item name="actionBarStyle">@style/Widget.Styled.ActionBar.Search</item>
        <item name="android:actionBarStyle">@style/Widget.Styled.ActionBar.Search</item>
    </style>
    <style name="Widget.Styled.ActionBar.Search" parent="Widget.Sherlock.Light.ActionBar">
        <item name="background">@drawable/bg_actionbar</item>
        <item name="android:background">@drawable/bg_actionbar</item>
        <item name="backgroundSplit">@drawable/bg_actionbar</item>
        <item name="android:backgroundSplit">@drawable/bg_actionbar</item>
        <item name="android:titleTextStyle">@style/NoTitleText</item>
        <item name="android:subtitleTextStyle">@style/NoTitleText</item>
        <item name="android:displayOptions">showHome|useLogo|showCustom</item>
        <item name="android:customNavigationLayout">@layout/custom_action</item>
    </style>
</resources>

尝试添加：

<item name="customNavigationLayout">@layout/custom_action</item>

@layout/custom\u操作

配合：

<item name="android:customNavigationLayout">@layout/custom_action</item>

@layout/custom\u操作

尝试添加：

<item name="customNavigationLayout">@layout/custom_action</item>

@layout/custom\u操作

配合：

<item name="android:customNavigationLayout">@layout/custom_action</item>

@layout/custom\u操作