ListView自定义

ListView网上资料很多，我所知扩展性最好、最通用的代码做个备忘。

总体上来讲：ListView+BaseAdapter+xml文件实现：

话不多说，先贴个图，预期效果如下：

首先：这样一个ListView的item包含：图片、文字，而且布局也比较复杂。首选自定义这样一个模版的xml文件。

第一步、主方法lin.xml，加一个listveiw布局

<?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:background="#FFFFFF"
    android:orientation="vertical" >
    <ListView
	    android:id="@+id/lst_v"
	    android:layout_width="match_parent"
	    android:layout_height="match_parent"
	    ></ListView>
</LinearLayout>

第二步：自定义item.xml（写Demo有些懒，稍微简化了几个textview）

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff" >

    <ImageView
        android:id="@+id/img_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:background="@drawable/img_1" />

    <TextView
        android:id="@+id/title_1"
        android:layout_width="130dp"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/img_1"
        android:gravity="left"
        android:paddingLeft="10dp"
        android:paddingTop="10dp"
        android:text="豫蜀房河南烩面"
        android:textColor="#000000"
        android:singleLine="true"
        android:textSize="16sp" />

    <ImageView
        android:id="@+id/img_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_toRightOf="@+id/title_1"
        android:background="@drawable/img_2" />

    <ImageView
        android:id="@+id/img_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="4dp"
        android:layout_marginTop="8dp"
        android:layout_toRightOf="@+id/img_2"
        android:background="@drawable/img_3" />

    <ImageView
        android:id="@+id/score"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/title_1"
        android:layout_marginLeft="6dp"
        android:layout_marginTop="6dp"
        android:layout_toRightOf="@+id/img_1"
        android:background="@drawable/score" />

    <TextView
        android:id="@+id/address"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/score"
        android:layout_toRightOf="@+id/img_1"
        android:paddingLeft="12dp"
        android:paddingTop="10dp"
        android:text="快餐 五棵松"
        android:textSize="14sp" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0.2dp"
        android:layout_alignBottom="@+id/img_1"
        android:background="#cccccc" />

</RelativeLayout>

第二步、写一个Databean文件，用来包含所有item的内容集

import java.io.Serializable;

public class DataBean implements Serializable{

	/**
	 *
	 */
	private static final long serialVersionUID = 1L;
	int imgId;
	String title;
	String address;
	public int getImgId() {
		return imgId;
	}
	public void setImgId(int imgId) {
		this.imgId = imgId;
	}
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}

}

第三步、写一个adapter继承自baseAdapter

package com.mylistview.listviewdm;

import java.util.ArrayList;

import com.mylistview.bean.DataBean;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ListViewAdapter extends BaseAdapter {

	Context mContext;
	ArrayList<DataBean> mData;

	public ListViewAdapter(Context mContext, ArrayList<DataBean> mData) {
		super();
		this.mContext = mContext;
		this.mData = mData;
	}

	@Override
	public int getCount() {
		return mData.size();
	}

	@Override
	public Object getItem(int position) {
		return mData.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ViewHolder holder = null;
		if (convertView == null) {
			holder = new ViewHolder();
			convertView = View.inflate(mContext, R.layout.item, null);
			holder.img_1 = (ImageView) convertView.findViewById(R.id.img_1);
			holder.title_1 = (TextView) convertView.findViewById(R.id.title_1);
			holder.address = (TextView) convertView.findViewById(R.id.address);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		holder.img_1.setBackgroundResource(mData.get(position).getImgId());
		holder.title_1.setText(mData.get(position).getTitle());
		holder.address.setText(mData.get(position).getAddress());
		return convertView;
	}

	class ViewHolder {
		ImageView img_1;
		TextView title_1;
		TextView address;
	}

}

第五步、拟数据到主方法,设置listveiw适配器

package com.mylistview.listviewdm;

import java.util.ArrayList;

import com.mylistview.bean.DataBean;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;

public class MainActivity extends Activity {

	private ArrayList<DataBean> mData;
	private ListView list_v;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.lin);
        initView();
        initData();
    }
	private void initView() {
		// TODO Auto-generated method stub
		list_v = (ListView)findViewById(R.id.lst_v);

	}
	private void initData() {
		// TODO Auto-generated method stub
		mData = new ArrayList<DataBean>();
		setData();
		list_v.setAdapter(new ListViewAdapter(this, mData));
	}
	private void setData() {
		// TODO Auto-generated method stub
		for (int i = 0; i < 4; i++) {
			DataBean mBean2 = new DataBean();
			mBean2.setImgId(R.drawable.img_1);
			mBean2.setTitle("豫蜀房河南烩面");
			mBean2.setAddress("快餐 五棵松");
			mData.add(mBean2);

			DataBean mBean = new DataBean();
			mBean.setImgId(R.drawable.img_5);
			mBean.setTitle("三样菜（阜成路店）");
			mBean.setAddress("川菜 四季青");
			mData.add(mBean);

			DataBean mBean3 = new DataBean();
			mBean3.setImgId(R.drawable.img_6);
			mBean3.setTitle("郁陵岛炭火烤肉");
			mBean3.setAddress("韩国菜 航天桥");
			mData.add(mBean3);
		}
	}
}

最后贴一张实现的效果图