在android baseadapter中，当部分中没有项目时如何隐藏部分标题

Question

我使用组件android-section-list在我的listView中创建部分，它使用baseadapter。

listView显示艺术家，每个部分按字母表对艺术家进行分组。目前在我的代码中，这些部分的范围从a-z和0-9。但在某些情况下，某些部分没有项目，因此无需显示没有艺术家的部分。

import java.util.LinkedHashMap;
import java.util.Map;

import android.content.Context;
import android.graphics.Typeface;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;

public class SeparatedListAdapter extends BaseAdapter {  

    public final Map<String,Adapter> sections = new LinkedHashMap<String,Adapter>();  
    public final ArrayAdapter<String> headers;  
    public final static int TYPE_SECTION_HEADER = 0;  
    Typeface arialFont, folksFont;
    String activity;

    public SeparatedListAdapter(Context context) {  
        headers = new ArrayAdapter<String>(context, R.layout.list_header);

    }  

    public void addSection(String section, Adapter adapter) {  
        this.headers.add(section);  
        this.sections.put(section, adapter);  
    }  

    public Object getItem(int position) {  
        for(Object section : this.sections.keySet()) {  
            Adapter adapter = sections.get(section);  
            int size = adapter.getCount() + 1;  

            // check if position inside this section  
            if(position == 0) return section;  
            if(position < size) return adapter.getItem(position - 1);  

            // otherwise jump into next section  
            position -= size;  
        }  
        return null;  
    }  

    public int getCount() {  
        // total together all sections, plus one for each section header  
        int total = 0;  
        for(Adapter adapter : this.sections.values())  
            total += adapter.getCount() + 1;  
        return total;  
    }  

    public int getViewTypeCount() {  
        // assume that headers count as one, then total all sections  
        int total = 1;  
        for(Adapter adapter : this.sections.values())  
            total += adapter.getViewTypeCount();  
        return total;  
    }  

    public int getItemViewType(int position) {  
        int type = 1;  
        for(Object section : this.sections.keySet()) {  
            Adapter adapter = sections.get(section);  
            int size = adapter.getCount() + 1;  

            // check if position inside this section  
            if(position == 0) return TYPE_SECTION_HEADER;  
            if(position < size) return type + adapter.getItemViewType(position - 1);  

            // otherwise jump into next section  
            position -= size;  
            type += adapter.getViewTypeCount();  
        }  
        return -1;  
    }  

    public boolean areAllItemsSelectable() {  
        return false;  
    }  

    public boolean isEnabled(int position) {  
        return (getItemViewType(position) != TYPE_SECTION_HEADER);  
    }

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


        int sectionnum = 0;
        for(Object section : this.sections.keySet()) {  
            Adapter adapter = sections.get(section);  
            int size = adapter.getCount() + 1;  

            // check if position inside this section  
            if(position == 0) return headers.getView(sectionnum, convertView, parent);  
            if(position < size) return adapter.getView(position - 1, convertView, parent);  

            // otherwise jump into next section  
            position -= size;  
            sectionnum++;  
        }  
        return null;  
    }  

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

}  

所以我的问题是当部分没有要显示的项目时，如何隐藏部分标题，更改是在getView（）方法或其他地方