好友列表功能实现代码：

import java.util.List;import com.lolo.my361.activity.slyday.R;import com.lolo.my361.entity.Friend;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;//好友列表功能public class MyFriendsAdapter extends BaseAdapter {	LayoutInflater inflater;	List
     
       list;	public MyFriendsAdapter(Context context, List
      
        list) {		inflater = LayoutInflater.from(context);		this.list = list;	}	@Override	public int getCount() {		// TODO Auto-generated method stub		return list.size();	}	@Override	public Object getItem(int position) {		// TODO Auto-generated method stub		return list.get(position);	}	@Override	public long getItemId(int position) {		// TODO Auto-generated method stub		return position;	}//好友信息，好友姓名，头像，信息	@SuppressWarnings("null")	@Override	public View getView(int position, View convertView, ViewGroup parent) {		// TODO Auto-generated method stub		viewHolder holder;		if (convertView == null) {			convertView = inflater.inflate(					R.layout.vip_myactivity_myfriend_item, null);			holder = new viewHolder();			holder.vip_friend_letter = (TextView) convertView					.findViewById(R.id.vip_friend_letter);			holder.vip_friend_name = (TextView) convertView					.findViewById(R.id.vip_friend_item_name);			convertView.setTag(holder);		} else {			holder = (viewHolder) convertView.getTag();		}		holder.vip_friend_name.setText(list.get(position).getName());		char letter = list.get(position).getName().substring(0, 1).charAt(0);		String currentLetter = (letter + "").toUpperCase();				String lastLetter = (position - 1) > 0 ? (list.get(position - 1)				.getName().substring(0, 1).charAt(0) + "") : "";		if (!lastLetter.equals(currentLetter)) {			holder.vip_friend_letter.setText(currentLetter);			holder.vip_friend_letter.setVisibility(View.VISIBLE);		} else {			holder.vip_friend_letter.setVisibility(View.GONE);		}		return convertView;	}	public class viewHolder {		TextView vip_friend_letter;		ImageView vip_friend_logo;		TextView vip_friend_name;	}}