Android 基本控件使用六（ListView+SimpleAdapter）

项目技术：利用 ListView + SimpleAdapter 将 name 和 number 显示出来，

通过给 item 设置监听（setOnItemClickListener）土司“ name 和 number ”

项目描述：通过 ListView+SimpleAdapter 将 name+ number 显示出来，并且 还需要在点击每一项时 土司“name 和 number ”

在每项显示多种数据的时候 我们可以使用 HashMap 来存放数据

实现如下图：

activity_main.xml

<RelativeLayoutxmlns: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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

<ListView
android:id="@+id/lv_contacts"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>

</RelativeLayout>

contact_item.xml

<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:padding="10dp"
android:layout_height="match_parent">

<TextView
android:id="@+id/tv_contact_item_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:layout_marginBottom="5dp"
android:textColor="#000000"
android:text="yyl"/>

<TextView
android:id="@+id/tv_contact_item_number"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tv_contact_item_name"
android:textSize="14sp"
android:textColor="#555555"
android:text="100000000"/>
</RelativeLayout>

实体类，用于描述数据的属性
Contact.java

package cn.sophia.android_listview_simpleadapter;

public class Contact {
private String
name;
private String
number;

public Contact(String name, String number) {
super();
this.name = name;
this.number = number;
}
public String getName() {
returnname;
}
public void setName(String name) {
this.name = name;
}
public String getNumber() {
returnnumber;
}
public void setNumber(String number) {
this.number = number;
}

}

MainActivity.java

package cn.sophia.android_listview_simpleadapter;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

// 声明控件

private ListView listView;

// 数据源

List<Map<String, Object>>data = new ArrayList<Map<String,Object>>();

// 适配器

private SimpleAdapter adater;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// 初始化控件

listView = (ListView) findViewById(R.id.lv_contacts);

// 创建数据源

Map<String, Object> item = null;

item = new HashMap<String, Object>();

item.put("name", "sophia");

item.put("number","11112222334");

data.add(item);

item = new HashMap<String, Object>();

item.put("name", "sophia0");

item.put("number","11112222335");

data.add(item);

item = new HashMap<String, Object>();

item.put("name", "sophia1");

item.put("number","11112222336");

data.add(item);

item = new HashMap<String, Object>();

item.put("name", "sophia2");

item.put("number","11112222337");

data.add(item);

item = new HashMap<String, Object>();

item.put("name", "sophia3");

item.put("number","111122223338");

data.add(item);

// 创建适配器

// 根据Map的哪个Key把数据取出来

String[] from = {"name","number"};

// 取出来的数据显示到哪个控件上

int[] to = {R.id.tv_contact_item_name,R.id.tv_contact_item_number};

adater = new SimpleAdapter(this, data, R.layout.contact_item, from , to);

// 设置适配器

listView.setAdapter(adater);

// 为控件设置监听
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
publicvoid onItemClick(AdapterView<?> parent, View view,
int position,
long id) {
Map<String, Object> item =data.get(position);
String name = item.get("name").toString();
String number = item.get("number").toString();
Toast.makeText(MainActivity.this,"name:"+name+"&"+"number:"+number, Toast.LENGTH_SHORT).show();
}

});

}

}