ListView多条目加载

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//布局文件

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"    android:layout_height="match_parent" tools:context="com.example.mylistview.MainActivity">  <ListView      android:layout_width="match_parent"      android:layout_height="match_parent"      android:id="@+id/lv"      ></ListView></android.support.constraint.ConstraintLayout>

//布局文件2

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/name"        android:text="商品1"        />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/goods"        /></LinearLayout>

//布局文件3

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/name2"        android:text="商品2"        />    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/img"        android:background="@mipmap/ic_launcher"        /></LinearLayout>

//MainActivity

package com.example.mylistview;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 java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private ListView lv;    List<String> list=new ArrayList<String>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv =(ListView)findViewById(R.id.lv);        indata();        lv.setAdapter(new mydata());    }    private void indata() {        for (int i=0;i<50;i++){            list.add(i+"");        }    }    class mydata extends BaseAdapter{        final int textview1=0;        final int textview2=1;        @Override        public int getCount() {            return list.size();        }        @Override        public Object getItem(int i) {            return list.get(i);        }        @Override        public long getItemId(int i) {            return i;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            ViewHolder vh;            int type = getItemViewType(i);            if(view==null){                vh=new ViewHolder();               switch (type){                   case 0:                       view=View.inflate(MainActivity.this,R.layout.textview1,null);                       vh.name=view.findViewById(R.id.name);                       vh.goods=view.findViewById(R.id.goods);                       break;                   case 1:                       view=View.inflate(MainActivity.this,R.layout.texteview2,null);                       vh.name2=view.findViewById(R.id.name2);                       vh.img=view.findViewById(R.id.img);                       break;                   default:break;               }                  view.setTag(vh);            }else{                vh=(ViewHolder)view.getTag();            }            switch (type){                case textview1:                    vh.name.setText("商品1"+list.get(i).toString());                    vh.goods.setText("香蕉"+list.get(i).toString());                    break;                case textview2:                    vh.name2.setText("商品2"+list.get(i).toString());                    vh.img.setBackgroundResource(R.mipmap.ic_launcher);                    break;            }            return view;        }        @Override        public int getViewTypeCount() {            return 2;        }        @Override        public int getItemViewType(int position) {           int p=position%6;            if(p==0){                return textview1;            }else if(p<3){                return textview2;            }else{                return textview1;            }        }        class ViewHolder{            TextView name,name2,goods;            ImageView img;        }    }}

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