使用自定义适配器实现ListView中的每一个list的不同显示风格

package com.kaiqi.apps_center.utils;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.appscenter.R;

/**
* 使用适配器实现一个ListView多个不同风格的list显示。
* 最上面显示应用简介
* 中间显示应用相关图片
* 最下面显示应用详细介绍
* @author ssrrxx
*
*/
public class AppDetailListViewBaseAdapter extends BaseAdapter {
private List<Map<String, Object>> list;
private LayoutInflater inflater;
//这里type不能用123，否则会越界
private static final int TYPE_1 = 0;
private static final int TYPE_2 = 1;
private static final int TYPE_3 = 2;
private Context context;

public AppDetailListViewBaseAdapter(
List<Map<String, Object>> list, Context context) {
this.list = list;
this.context = context;
inflater = LayoutInflater.from(context);
}

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

@Override
public Object getItem(int arg0) {
return null;
}

@Override
public long getItemId(int arg0) {
return 0;
}

/**
* 返回布局类型种数，布局会根据种数与下面的方法配合具体怎样实现布局
*/
@Override
public int getViewTypeCount() {
return list.size();
}

/**
* 根据item所在位置返回布局类型
* 该方法的作用是，根据上中下的位置，可能有超过4中的布局类型。分别调用不同的布局类型，在getView方法中根据TYPE进行相应的布局
*/
@Override
public int getItemViewType(int position) {
if (position  == 0) {
return TYPE_1;
} else if (position  == 1) {
return TYPE_2;
} else {
return TYPE_3;
}
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder1 holder1 = null;
ViewHolder2 holder2 = null;
ViewHolder3 holder3 = null;

int type = this.getItemViewType(position);

switch (type) {
case TYPE_1:
convertView = inflater.inflate(R.layout.app_detail_1, null);
holder1 = new ViewHolder1();
holder1.ico = (ImageView) convertView.findViewById(R.id.app_ico);
System.out.println(holder1.ico);
holder1.appName = (TextView) convertView
.findViewById(R.id.app_name);
holder1.appSize = (TextView) convertView
.findViewById(R.id.app_size);
holder1.appUpdateDate = (TextView) convertView
.findViewById(R.id.app_update_date);
holder1.appVersion = (TextView) convertView
.findViewById(R.id.app_version);
holder1.appClass = (TextView) convertView
.findViewById(R.id.app_class);
convertView.setTag(holder1);
holder1.ico.setImageResource(Integer.parseInt((String)list.get(position).get(
"appIco")));
holder1.appName.setText((String) list.get(position).get("appName"));
holder1.appSize.setText("大小："
+ (String) list.get(position).get("appSize"));
holder1.appUpdateDate.setText("更新："
+ (String) list.get(position).get("updateDate"));
holder1.appVersion.setText("版本："
+ (String) list.get(position).get("version"));
holder1.appClass.setText("分类："
+ (String) list.get(position).get("appClass"));
break;
case TYPE_2:
convertView = inflater.inflate(R.layout.app_detail_2, null);
holder2 = new ViewHolder2();
holder2.gallery = (Gallery) convertView.findViewById(R.id.app_pics);
int[] imageIds = (int[]) list.get(position).get("imageIds");
MyGalleryBaseAdapter adapter = new MyGalleryBaseAdapter(imageIds,
context);
holder2.gallery.setAdapter(adapter);
Log.v("type", "type2");
break;
case TYPE_3:
convertView = inflater.inflate(R.layout.app_detail_3, null);
holder3 = new ViewHolder3();
holder3.appIntroduction = (TextView) convertView
.findViewById(R.id.app_introduction);
Log.v("type", "type3");
holder3.appIntroduction.setText((String) list.get(position).get(
"appIntroduction"));
}

return convertView;
}

static class ViewHolder1 {
ImageView ico;
TextView appName;
TextView appSize;
TextView appUpdateDate;
TextView appVersion;
TextView appClass;
}

static class ViewHolder2 {
Gallery gallery;
}

static class ViewHolder3 {
TextView appIntroduction;
}
}