android listview多种布局 getViewTypeCount和getItemViewType

一般listview都是一种样式，但如果出现多种样式，类似于这一条item是文字下一条是图片在下一条是文字加图片，也许你会说那就在那就在一个xml文件里面写三者样式呗。那如果是一百个呢。。哇。。这维护起来可是个大工程，我可不想加班。

先上图片看看样子：两种样式只为了为了说明问题

那么方法来了，使用getViewTypeCount和getItemViewType

getViewTypeCount 方法返回的是你有几种样式返回时是 int类型

getItemViewType 返回值是你某一种样式的类型是什么。。返回值也是 int类型，意思是代表 A类型的是数字 1.。。就是这意思

两个方法很简单呢直接上代码，基本没什么特别的，就是加了两个方法而已

package com.org.mmp.Play;import java.util.List;import com.org.mmp.R;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;public class PlayAdapter extends BaseAdapter {/** * 标题的item */public static final int ITEM_TITLE = 0;/** * 二级菜单的item */public static final int ITEM_INTRODUCE = 1;private List mList;private Context context;private LayoutInflater inflater;// 两个样式 两个holder。100就写100holder。。当然你何以把他抽离出来这里先只为了说明问题class Holder1 {TextView play_title;Holder1(View view) {play_title = (TextView) view.findViewById(R.id.play_title);}}class Holder2 {TextView play_introduce_title;ImageView play_iv;Holder2(View view) {play_introduce_title = (TextView) view.findViewById(R.id.play_introduce_title);play_iv = (ImageView) view.findViewById(R.id.play_iv);}}public PlayAdapter(Context context, List mList) {this.context = context;this.mList = mList;inflater = LayoutInflater.from(context);}@Overridepublic int getCount() {// TODO Auto-generated method stubSystem.out.println("mList.size()" + mList.size());return mList.size();}@Overridepublic Object getItem(int arg0) {// TODO Auto-generated method stubreturn mList.get(arg0);}//返回 代表某一个样式 的 数值  @Overridepublic int getItemViewType(int position) {// TODO Auto-generated method stubreturn mList.get(position).type;}//两个样式 返回2@Overridepublic int getViewTypeCount() {// TODO Auto-generated method stubreturn 2;}@Overridepublic long getItemId(int arg0) {// TODO Auto-generated method stubreturn arg0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {int type = getItemViewType(position);Holder1 holder1 = null;Holder2 holder2 = null;System.out.println("getView " + position + " " + convertView+ " type = " + type);if (convertView == null) {//选择某一个样式。。switch (type) {case ITEM_TITLE:convertView = inflater.inflate(R.layout.play_item_title, null);holder1 = new Holder1(convertView);holder1.play_title.setText(mList.get(position).name);convertView.setTag(holder1);break;case ITEM_INTRODUCE:convertView = inflater.inflate(R.layout.paly_item_introduce,null);holder2 = new Holder2(convertView);holder2.play_introduce_title.setText(mList.get(position).address);convertView.setTag(holder2);break;default:break;}} else {switch (type) {case ITEM_TITLE:holder1 = (Holder1) convertView.getTag();holder1.play_title.setText(mList.get(position).name);break;case ITEM_INTRODUCE:holder2 = (Holder2) convertView.getTag();holder2.play_introduce_title.setText(mList.get(position).address);break;default:break;}}return convertView;}}

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