模拟QQ分组

 package com.lixu.fenzu;

 import java.util.ArrayList;
 import java.util.HashMap;

 import android.app.ListActivity;
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.LayoutInflater;

 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.TextView;

 public class MainActivity extends ListActivity {
     private static final String TYPE = "type";
     private static final String DATE = "date";
     private static final int GROUP = -1;
     private static final int ITEM = -2;

     private ArrayList<HashMap<String, Object>> item = null;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         ListView lv = this.getListView();
         ArrayAdapter adapter = new MyAdaper(this, 1);

         item = new ArrayList<HashMap<String, Object>>();

         String[] groups = { "家人", "朋友", "同学", "同事" };
         String[] date = { "张三", "李四", "王五", "狗儿" };
         for (String str:groups) {
             HashMap<String, Object> group_map = new HashMap<String, Object>();

             group_map.put(TYPE, GROUP);
             group_map.put(DATE, str);
             item.add(group_map);
             for (String n : date) {

                 HashMap<String, Object> date_map = new HashMap<String, Object>();

                 date_map.put(TYPE, ITEM);
                 date_map.put(DATE, n);
                 item.add(date_map);

             }

         }
         lv.setAdapter(adapter);

     }

     public class MyAdaper extends ArrayAdapter {
         private LayoutInflater flater = null;

         public MyAdaper(Context context, int resource) {
             super(context, resource);
             flater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         }

         @Override
         public int getCount() {
             return item.size();
         }

         @Override
         public int getItemViewType(int position) {
             HashMap<String, Object> map = item.get(position);
             return (Integer) map.get(TYPE);
         }

         @Override
         public int getViewTypeCount() {

             return 2;
         }

         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
             int type = getItemViewType(position);
             // 根据不同的view type加载不同的布局文件。
             switch (type) {
             case GROUP:

                 convertView = flater.inflate(R.layout.activity_main, null);
                 TextView tv1 = (TextView) convertView.findViewById(R.id.tv1);
                 tv1.setText(item.get(position).get(DATE) + "");
                 tv1.setBackgroundColor(Color.RED);
                 tv1.setTextSize(20);

                 break;
             case ITEM:
                 convertView = flater.inflate(R.layout.activity_main, null);
                 TextView tv2 = (TextView) convertView.findViewById(R.id.tv1);
                 tv2.setText(item.get(position).get(DATE) + "");

                 break;

             default:
                 break;
             }

             return convertView;
         }

     }
 }

运行效果：