ListView的适配（使用自定义ArrayAdapter）

ListView在平时开发中使用的最广泛，应用也是最多的，而使用系统的适配器并不能满足我们多样化的要求，因此本文就自定义适配器展开，下面直接附上我已经测试通过的代码：
MainActivity.java:

package com.example.listviewpushtorefresh;import java.util.ArrayList;import java.util.List;import bean.Person;import android.app.Activity;import android.os.Bundle;import android.widget.ListView;public class MainActivity extends Activity {    private ListView listview;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listview = (ListView) findViewById(R.id.listview);        MyAdapter adapter = new MyAdapter(MainActivity.this,0,getData());        listview.setAdapter(adapter);    }    private List<Person> getData() {        // TODO Auto-generated method stub        List<Person> list= new ArrayList<Person>();        for(int i=0;i<20;i++)        {            Person p = new Person(R.drawable.ic_launcher,i+"","我是第"+i+"项");            list.add(p);        }        return list;    }}

自定义数据类型：Person.java

package bean;public class Person { private int mPicture; private String mTitle; private String mContent; public  Person(int picture,String title,String content){     this.mPicture = picture;     this.mTitle = title;     this.mContent = content; }public int getPicture() {    return mPicture;}public void setmPicture(int mPicture) {    this.mPicture = mPicture;}public String getTitle() {    return mTitle;}public void setTitle(String mTitle) {    this.mTitle = mTitle;}public String getContent() {    return mContent;}public void setContent(String mContent) {    this.mContent = mContent;}}

自定义适配器：MyAdapter.java

package com.example.listviewpushtorefresh;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.ImageView;import android.widget.TextView;import bean.Person;public class MyAdapter extends ArrayAdapter<Person> {    private int resoureId;    private List<Person> objects;    private Context context;    public MyAdapter(Context context, int resourceId, List<Person> objects) {        super(context, resourceId, objects);        // TODO Auto-generated constructor stub        this.objects=objects;        this.context=context;    }    private static class ViewHolder    {        ImageView imageView;        TextView title;        TextView content;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return objects.size();    }    @Override    public Person getItem(int position) {        // TODO Auto-generated method stub        return objects.get(position);    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub        ViewHolder viewHolder = null;        if(convertView==null)        {            viewHolder=new ViewHolder();            LayoutInflater mInflater=LayoutInflater.from(context);            convertView = mInflater.inflate(R.layout.item, null);            viewHolder.imageView = (ImageView) convertView.findViewById(R.id.imageview);            viewHolder.title = (TextView) convertView.findViewById(R.id.title);            viewHolder.content = (TextView) convertView.findViewById(R.id.content);            convertView.setTag(viewHolder);        }        else        {            viewHolder = (ViewHolder) convertView.getTag();        }        Person person = objects.get(position);        if(null!=person)        {            viewHolder.imageView.setBackgroundResource(person.getPicture());            viewHolder.title.setText(person.getTitle());            viewHolder.content.setText(person.getContent());        }        return convertView;    }}

主布局文件：main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent" >  <ListView       android:layout_width="match_parent"      android:layout_height="wrap_content"      android:id="@+id/listview"      android:layout_margin="2dp"      >  </ListView></RelativeLayout>

item.xml:

<?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"    android:orientation="horizontal"     android:background="#a4d3ee">    <ImageView         android:id="@+id/imageview"        android:layout_width="50dp"        android:layout_weight="0"        android:layout_height="wrap_content"        android:background="@drawable/ic_launcher"        />    <LinearLayout         android:layout_width="wrap_content"        android:layout_weight="1"        android:layout_height="wrap_content"        android:orientation="vertical"        android:layout_marginLeft="10dp"        android:layout_marginTop="10dp"         android:layout_marginBottom="10dp">         <TextView         android:id="@+id/title"        android:layout_width="150dp"        android:layout_height="wrap_content"        android:text="title"        android:textSize="20sp"/>    <TextView         android:id="@+id/content"        android:layout_width="150dp"        android:layout_height="wrap_content"        android:text="content"/>    </LinearLayout></LinearLayout>