ListView中item的不同布局

package com.example.test1;


import java.util.List;


import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;


import android.content.Context;
import android.graphics.Bitmap;
import android.text.TextUtils;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;


public class MyAdapter extends BaseAdapter {
Context context;
List<Data> list;


public MyAdapter(Context context, List<Data> list) {
this.context = 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 null;
}


@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}


@Override
public View getView(int position, View convertView, ViewGroup parent) {
// 获取当前条目显示的类型
int itemViewType = getItemViewType(position);
// /////////////////////////优化//////////////////////////////////////////////
ViewHolder1 holder1 = null;
ViewHolder2 holder2 = null;
if (convertView == null) {
switch (itemViewType) {


case 0:
// 根据数据类型,加载有图片的布局文件
convertView = View.inflate(context, R.layout.item1, null);
holder1 = new ViewHolder1();


ImageLoader instance = ImageLoader.getInstance();

holder1.imageView = (ImageView) convertView
.findViewById(R.id.imageView);
holder1.tv_title = (TextView) convertView
.findViewById(R.id.tv_title);
holder1.tv_date = (TextView) convertView
.findViewById(R.id.tv_date);
holder1.tv_copyright = (TextView) convertView
.findViewById(R.id.tv_copyright);


convertView.setTag(holder1);
break;
case 1:
// 根据数据类型,加载没有图片的布局文件
convertView = View.inflate(context, R.layout.item2, null);
holder2 = new ViewHolder2();
holder2.tv_title = (TextView) convertView
.findViewById(R.id.tv_title);
holder2.tv_date = (TextView) convertView
.findViewById(R.id.tv_date);
holder2.tv_copyright = (TextView) convertView
.findViewById(R.id.tv_copyright);
convertView.setTag(holder2);
break;


}


} else {


switch (itemViewType) {
case 0:
holder1 = (ViewHolder1) convertView.getTag();
break;
case 1:
holder2 = (ViewHolder2) convertView.getTag();
break;


}


}


// ////////////////////////给控件赋值////////////////////////////////////////////
Data data = list.get(position);
switch (itemViewType) {
case 0:
// holder1.imageView.setImageResource(R.drawable.ic_launcher);
ImageLoader instance = ImageLoader.getInstance();
instance.displayImage(data.getImgs(), holder1.imageView);
holder1.tv_copyright.setText(data.getCopyright());
holder1.tv_date.setText(data.getPubDate());
holder1.tv_title.setText(data.getTitle());
break;


case 1:
holder2.tv_copyright.setText(data.getCopyright());
holder2.tv_date.setText(data.getPubDate());
holder2.tv_title.setText(data.getTitle());
break;
}


return convertView;


}


@Override
// 获得当前条目的种类
public int getItemViewType(int position) {


Data data = list.get(position);
// 如果包含图片地址,返回0;
if (data.getImgs().contains("jpg")) {


return 0;
} else {
// 如果不包含图片地址,返回1;
return 1;
}
}


@Override
// 设置listVIew条目布局的类型总数
public int getViewTypeCount() {


return 2;
}


// 有图片的id持有类
class ViewHolder1 {
ImageView imageView;
TextView tv_title;
TextView tv_date;
TextView tv_copyright;


}


// 没有图片的id持有类
class ViewHolder2 {
TextView tv_title;
TextView tv_date;
TextView tv_copyright;


}


}