在Listview操作栏中选择项目

Question

如何在启动自定义操作栏后选择ListView中的项目。

public class UserListActivityAdapter extends BaseAdapter {

String[] mNameList;
int[] imageID;
Context mContext;
LayoutInflater inflater;
boolean isLongPressed = false;

public UserListActivityAdapter(UserListAcitivty context,
        String[] nameList,
        int[] imageList) {

    this.mContext = context;
    this.imageID = imageList;
    this.mNameList = nameList;
    inflater = LayoutInflater.from(context);

}

@Override
public int getCount() {
    return mNameList.length;
}

@Override
public Object getItem(int position) {
    return position;
}

@Override
public long getItemId(int position) {
    return position;
}

public static class Holder {
    TextView tv;
    TextView desc;
    ImageView img;
}

@Override
public View getView(int position,
        View convertView,
        ViewGroup parent) {

    Holder holder = new Holder();
    View rowView;

    rowView = inflater.inflate(R.layout.row_layout_user, parent,    false);
    holder.tv = (TextView) rowView.findViewById(R.id.desc);
    holder.desc = (TextView) rowView.findViewById(R.id.name);
    holder.img = (ImageView) rowView.findViewById(R.id.icon);
    holder.desc.setText(mNameList[position]);
    holder.tv.setText("Blub");
    holder.img.setImageResource(imageID[position]);
    return rowView;
}

当我点击一个项目时，它会改变背景但当我启动动作栏时它不再改变。

public class UserListAcitivty extends Activity implements
    MultiChoiceModeListener  {
private ListView mListView;
String[] list;
private int count;
UserListActivityAdapter user;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    list = new String[] { "Hans Schmidt", "Felix DieKatze", "Wolfgang  Müller" };
    int[] img = new int[] { R.drawable.ic_launcher,   R.drawable.abs__ab_bottom_solid_dark_holo, R.drawable.icon };
    setContentView(R.layout.userlistactivity_layout);

    mListView = (ListView) findViewById(R.id.userList);
    mListView.setEmptyView(findViewById(R.id.empty_userlist));
    user = new UserListActivityAdapter(this, list, img);
    mListView.setAdapter(user);
    mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    mListView.setMultiChoiceModeListener(this);
}


        @Override
        public boolean onPrepareActionMode(ActionMode mode,
                Menu menu) {

            return false;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {

        }

        @Override
        public boolean onCreateActionMode(ActionMode mode,
                Menu menu) {
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate(R.menu.my_context_menu, menu);
            return true;
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode,
                MenuItem item) {
            return false;
        }

        @Override
        public void onItemCheckedStateChanged(ActionMode mode,
                int position,
                long id,
                boolean checked) {
            count = count + 1;
            mode.setTitle(count + " User selected");
    mListView.setItemChecked(position, checked);

        }
}

这是视图的选择器

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
     <!-- Normal state. -->
<item android:drawable="@color/list_row_default_bg" 
    android:state_pressed="false" 
    android:state_selected="false"/>
<!-- pressed state. -->
<item android:drawable="@color/list_row_pressed_bg" 
    android:state_pressed="true"/>
<!-- Selected state. -->
<item android:drawable="@color/list_row_selected_bg" 
    android:state_selected="true"/>