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 getData() {
        // TODO Auto-generated method stub
        List list= new ArrayList();
        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 {

    private int resoureId;
    private List objects;
    private Context context;


    public MyAdapter(Context context, int resourceId, List 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:

<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>