listview多条目

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<pre name="code" class="java"></pre><pre name="code" class="java">关键点提示</pre><pre name="code" class="java">1-->Adapter需要重写getViewTyptCount,getItemViewTypt</pre><pre name="code" class="java"></pre><pre name="code" class="java">getView 方法中要写两个Holder进行优化;</pre><pre name="code" class="java"></pre><pre name="code" class="java"></pre><pre name="code" class="java">一 javabean对象
package com.wzq.moreitemlistviewdemo;
public class Goods {
private String name;
private String price;
private int resId;
private int typeId;
public Goods(String name, String price, Integer typeId) {
super();
this.name = name;
this.price = price;
this.typeId = typeId;
}
public Goods(String name, String price, int resId, Integer typeId) {
super();
this.name = name;
this.price = price;
this.resId = resId;
this.typeId = typeId;
}
public int getTypeId() {
return typeId;
}
public void setTypeId(int typeId) {
this.typeId = typeId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public int getResId() {
return resId;
}
public void setResId(int resId) {
this.resId = resId;
}
@Override
public String toString() {
return "Goods [name=" + name + ", price=" + price + ", resId=" + resId
+ "]";
}
}
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<pre name="code" class="java"><pre name="code" class="java">第二listview和adapter的写法
package com.wzq.moreitemlistviewdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
import butterknife.BindView;
import butterknife.ButterKnife;
/**
* listview多条目加载,使用项目使用imageloader,butterknife;
*/
public class MainActivity extends AppCompatActivity {
@BindView(R.id.lv)
ListView lv;
private ArrayList<Goods> goodsList;
String imgUrl = "http://image.tianjimedia.com/uploadImages/2012/067/N80N0GUA36N0.jpg";
private ImageView img;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//使用butterKnife来注解控件;
ButterKnife.bind(this);
initData();
}
private void initData() {
goodsList = new ArrayList<Goods>();
goodsList.add(new Goods("商品1", "21", 0));
goodsList.add(new Goods("商品3", "23", 0));
goodsList.add(new Goods("商品4", "24", R.drawable.hu, 1));
goodsList.add(new Goods("商品2", "22", R.drawable.hu, 1));
goodsList.add(new Goods("商品5", "25", 0));
goodsList.add(new Goods("商品6", "26", R.drawable.hu, 1));
goodsList.add(new Goods("商品21", "21", 0));
goodsList.add(new Goods("商品5", "25", 0));
goodsList.add(new Goods("商品22", "22", R.drawable.hu, 1));
goodsList.add(new Goods("商品23", "23", 0));
goodsList.add(new Goods("商品24", "24", R.drawable.hu, 1));
goodsList.add(new Goods("商品25", "25", 0));
goodsList.add(new Goods("商品26", "26", R.drawable.hu, 1));
goodsList.add(new Goods("商品31", "21", 0));
goodsList.add(new Goods("商品32", "22", R.drawable.hu, 1));
goodsList.add(new Goods("商品34", "24", R.drawable.hu, 1));
goodsList.add(new Goods("商品36", "26", R.drawable.hu, 1));
goodsList.add(new Goods("商品33", "23", 0));
goodsList.add(new Goods("商品35", "25", 0));
//把数据配置给listview
lv.setAdapter(new MBaseAdapter());
}
class MBaseAdapter extends BaseAdapter {
private final int type1 = 0;
private final int type2 = 1;
@Override
public int getCount() {
return goodsList.size();
}
@Override
public Object getItem(int i) {
return goodsList.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View convertView, ViewGroup viewGroup) {
int typeId = goodsList.get(i).getTypeId();
switch (typeId) {
case type1:
Holder1 holder1 = null;
if (convertView == null) {
holder1 = new Holder1();
convertView = View.inflate(MainActivity.this, R.layout.lv_item_1, null);
holder1.textView1 = convertView.findViewById(R.id.textView1);
holder1.textView2 = convertView.findViewById(R.id.textView2);
convertView.setTag(holder1);
} else {
holder1 = (Holder1) convertView.getTag();
}
holder1.textView1.setText(goodsList.get(i).getName());
holder1.textView2.setText(goodsList.get(i).getPrice());
break;
case type2:
Holder2 holder2 = null;
if (convertView == null) {
holder2 = new Holder2();
convertView = View.inflate(MainActivity.this, R.layout.lv_item_2, null);
holder2.textView1 = convertView.findViewById(R.id.textView1);
holder2.textView2 = convertView.findViewById(R.id.textView2);
holder2.imageView1 = convertView.findViewById(R.id.imageView1);
convertView.setTag(holder2);
} else {
holder2 = (Holder2) convertView.getTag();
}
holder2.textView1.setText(goodsList.get(i).getName());
holder2.textView2.setText(goodsList.get(i).getPrice());
// holder2.imageView1.setImageResource(R.drawable.hu);
ImageLoader.getInstance().displayImage(imgUrl, holder2.imageView1);
break;
}
return convertView;
}
//返回条目有多少种类型
@Override
public int getViewTypeCount() {
return 2;
}
//返回条目的类型
@Override
public int getItemViewType(int position) {
return goodsList.get(position).getTypeId();
}
}
class Holder1 {
TextView textView1, textView2;
}
class Holder2 {
TextView textView1, textView2;
ImageView imageView1;
}
}
</pre>
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