Android之自定义Adapter的ListView

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"

Android:orientation="vertical"

Android:layout_width="fill_parent"

Android:layout_height="fill_parent">

<!-- 结算 -->

<LinearLayout Android:gravity="center_horizontal"

Android:orientation="horizontal" android:layout_width="fill_parent"

Android:layout_height="wrap_content">

<TextView Android:text="结算： "

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:textColor="#FFFFFFFF"

Android:textSize="20px"/>

<ImageButton Android:id="@+id/imgbt_sum"

Android:layout_width="40px"

Android:layout_height="40px"

Android:background = "@drawable/shopping" />

</LinearLayout>

<TextView Android:text="商品列表： "

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:textColor="#FFFFFFFF" />

<!-- 商品列表 -->

<ListView Android:id="@+id/list_goods"

Android:layout_width="fill_parent"

Android:layout_height="wrap_content" />

</LinearLayout>

列表项布局文件list_item.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"

Android:orientation="horizontal" android:layout_width="fill_parent"

Android:layout_height="fill_parent">

<!-- 商品图片 -->

<ImageView Android:id="@+id/imageItem"

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:layout_margin="5px"/>

<!-- 商品信息 -->

<LinearLayout Android:orientation="vertical"

Android:layout_width="wrap_content"

Android:layout_height="wrap_content">

<TextView Android:id="@+id/titleItem"

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:textColor="#FFFFFFFF"

Android:textSize="13px" />

<TextView Android:id="@+id/infoItem"

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:textColor="#FFFFFFFF"

Android:textSize="22px" />

</LinearLayout>

<!-- 购买和商品详情 -->

<LinearLayout Android:gravity="right"

Android:orientation="horizontal" android:layout_width="fill_parent"

Android:layout_height="wrap_content">

<CheckBox Android:id="@+id/checkItem"

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:layout_margin="5px"/>

<Button Android:id="@+id/detailItem"

Android:layout_width="wrap_content"

Android:layout_height="wrap_content"

Android:layout_margin="5px"/>

</LinearLayout>

</LinearLayout>

2)代码，主代码：



package com.myAndroid.test;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import Android.app.Activity;

import Android.app.AlertDialog;

import Android.content.DialogInterface;

import Android.os.Bundle;

import Android.view.View;

import Android.view.View.OnClickListener;

import Android.widget.ArrayAdapter;

import Android.widget.ImageButton;

import Android.widget.ListView;

public class MyListView extends Activity {

private ListView listView;

private ImageButton imgbt_sum;

private ListViewAdapter listViewAdapter;

private List<Map<String, Object>> listItems;

private Integer[] imgeIDs = {R.drawable.cake,

R.drawable.gift, R.drawable.letter,
R.drawable.love, R.drawable.mouse,
R.drawable.music};
private String[] goodsNames = {"蛋糕", "礼物",

"邮票", "爱心", "鼠标", "音乐CD"};

private String[] goodsDetails = {

"蛋糕：好好吃。",

"礼物：礼轻情重。",

"邮票：环游世界。",

"爱心：世界都有爱。",

"鼠标：反应敏捷。",

"音乐CD：酷我音乐。"};

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

listView = (ListView)findViewById(R.id.list_goods);
imgbt_sum = (ImageButton) findViewById(R.id.imgbt_sum);

imgbt_sum.setOnClickListener(new ClickEvent());

listItems = getListItems();
listViewAdapter = new ListViewAdapter(this, listItems); //创建适配器

listView.setAdapter(listViewAdapter);
}

/**

* 初始化商品信息

*/

private List<Map<String, Object>> getListItems() {

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

for(int i = 0; i < goodsNames.length; i++) {

Map<String, Object> map = new HashMap<String, Object>();

map.put("image", imgeIDs[i]); //图片资源

map.put("title", "物品名称："); //物品标题

map.put("info", goodsNames[i]); //物品名称

map.put("detail", goodsDetails[i]); //物品详情

listItems.add(map);
}
return listItems;

}

class ClickEvent implements OnClickListener{

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

String goodsList = "";

for(int i = 0; i < listItems.size(); i++) {

goodsList += listViewAdapter.hasChecked(i)? goodsNames[i] + " ": "";

}
new AlertDialog.Builder(MyListView.this)

.setTitle("购物清单：")

.setMessage("你好，你选择了如下商品：\n" + goodsList)

.setPositiveButton("确定", null)

.show();
}

}
}

适配器代码：

[align=center][/align]

package com.myAndroid.test;

import java.util.List;

import java.util.Map;

import Android.app.AlertDialog;

import Android.content.Context;

import Android.util.Log;

import Android.view.LayoutInflater;

import Android.view.View;

import Android.view.ViewGroup;

import Android.widget.BaseAdapter;

import Android.widget.Button;

import Android.widget.CheckBox;

import Android.widget.CompoundButton;

import Android.widget.ImageView;

import Android.widget.ListView;

import Android.widget.TextView;

public class ListViewAdapter extends BaseAdapter {

private Context context; //运行上下文

private List<Map<String, Object>> listItems; //商品信息集合

private LayoutInflater listContainer; //视图容器

private boolean[] hasChecked; //记录商品选中状态

public final class ListItemView{ //自定义控件集合

public ImageView image;

public TextView title;

public TextView info;

public CheckBox check;

public Button detail;

}

public ListViewAdapter(Context context, List<Map<String, Object>> listItems) {

this.context = context;

listContainer = LayoutInflater.from(context); //创建视图容器并设置上下文

this.listItems = listItems;

hasChecked = new boolean[getCount()];

}

public int getCount() {

// TODO Auto-generated method stub

return listItems.size();

}

public Object getItem(int arg0) {

// TODO Auto-generated method stub

return null;

}

public long getItemId(int arg0) {

// TODO Auto-generated method stub

return 0;

}

/**

* 记录勾选了哪个物品

* @param checkedID 选中的物品序号

*/

private void checkedChange(int checkedID) {

hasChecked[checkedID] = !hasChecked[checkedID];

}

/**

* 判断物品是否选择

* @param checkedID 物品序号

* @return 返回是否选中状态

*/

public boolean hasChecked(int checkedID) {

return hasChecked[checkedID];

}

/**

* 显示物品详情

* @param clickID

*/

private void showDetailInfo(int clickID) {

new AlertDialog.Builder(context)

.setTitle("物品详情：" + listItems.get(clickID).get("info"))

.setMessage(listItems.get(clickID).get("detail").toString())

.setPositiveButton("确定", null)

.show();
}

/**

* ListView Item设置

*/

public View getView(int position, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

Log.e("method", "getView");

final int selectID = position;

//自定义视图

ListItemView listItemView = null;

if (convertView == null) {

listItemView = new ListItemView();

//获取list_item布局文件的视图

convertView = listContainer.inflate(R.layout.list_item, null);

//获取控件对象

listItemView.image = (ImageView)convertView.findViewById(R.id.imageItem);

listItemView.title = (TextView)convertView.findViewById(R.id.titleItem);

listItemView.info = (TextView)convertView.findViewById(R.id.infoItem);

listItemView.detail= (Button)convertView.findViewById(R.id.detailItem);

listItemView.check = (CheckBox)convertView.findViewById(R.id.checkItem);

//设置控件集到convertView

convertView.setTag(listItemView);
}else {

listItemView = (ListItemView)convertView.getTag();

}
// Log.e("image", (String) listItems.get(position).get("title")); //测试

// Log.e("image", (String) listItems.get(position).get("info"));

//设置文字和图片

listItemView.image.setBackgroundResource((Integer) listItems.get(

position).get("image"));

listItemView.title.setText((String) listItems.get(position)

.get("title"));

listItemView.info.setText((String) listItems.get(position).get("info"));

listItemView.detail.setText("商品详情");

//注册按钮点击时间爱你

listItemView.detail.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

//显示物品详情

showDetailInfo(selectID);
}
});
// 注册多选框状态事件处理

listItemView.check
.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(CompoundButton buttonView,

boolean isChecked) {

//记录物品选中状态

checkedChange(selectID);
}
});

return convertView;

}
}