Android UI ListView(2)

一个人物对象 List的实现

 

 

 

 

实现步骤：

1.在xml布局文件中添加ListView控件节点并且设置好相关属性

2.在activity里findViewById 找到ListView控件对象

3.创建ListView的适配器adapter (这里采用ArrayAdapter<Person> adapter)

4.给ListView绑定adapter

5.通过adapter往ListView里添加item

6.给ListView注册itemClickListener

7.实现itemClickListener方法，通过getItem(positon)来获取item所对应的对象

8.解析对象属性，Toast打印！

<?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="vertical" >

    <ListView android:id="@+id/lv_person" 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
    </ListView>

</LinearLayout>

package cn.jinyejun.ui_listview;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import cn.jinyejun.information.Person;

public class PersonListView extends Activity implements OnItemClickListener {

	private ListView lv;					//ListView组件
	private ArrayAdapter<Person> adapter;	//ListView组件的适配器

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_personlist);
		
		//创建ListView的适配器adapter用来适配ListView里的布局风格和布局内容
		adapter = new ArrayAdapter<Person>(this,
				android.R.layout.simple_list_item_1);
		
		//通过id索引到ListView的组件
		lv = (ListView) findViewById(R.id.lv_person);
		
		//给ListView添加适配器
		lv.setAdapter(adapter);
		
		//通过adapter往ListView里面添加内容
		adapter.add(new Person(0001, "小明", "男", 18));
		adapter.add(new Person(0002, "小莉", "女", 19));
		adapter.add(new Person(0003, "小强", "男", 18));
		adapter.add(new Person(0004, "小楠", "女", 20));

		//给ListView添加item点击事件
		lv.setOnItemClickListener(this);
	}

	/**
	 * ListView 的item 点击时候触发的事件
	 */
	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		//获取被点击item所包含的对象
		Person data = adapter.getItem(position);
		//Toast打印信息
		String info = String.format("id:%d,name:%s,sex:%s,age:%d",
				data.getId(), data.getName(), data.getSex(), data.getAge());
		Toast.makeText(PersonListView.this, info, Toast.LENGTH_SHORT).show();

	}

}