Android之自定义Adapter的ListView

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:Android="http://schemas.android.com/apk/res/android"
Android:orientation="vertical"
Android:layout_width="fill_parent"
Android:layout_height="fill_parent">
<LinearLayoutAndroid:gravity="center_horizontal"
Android:orientation="horizontal"android:layout_width="fill_parent"
Android:layout_height="wrap_content">
<TextViewAndroid:text="结算："
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:textColor="#FFFFFFFF"
Android:textSize="20px"/>
<ImageButtonAndroid:id="@+id/imgbt_sum"
Android:layout_width="40px"
Android:layout_height="40px"
Android:background="@drawable/shopping"/>
</LinearLayout>
<TextViewAndroid:text="商品列表："
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:textColor="#FFFFFFFF"/>
<ListViewAndroid: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

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:Android="http://schemas.android.com/apk/res/android"
Android:orientation="horizontal"android:layout_width="fill_parent"
Android:layout_height="fill_parent">
<ImageViewAndroid:id="@+id/imageItem"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:layout_margin="5px"/>
<LinearLayoutAndroid:orientation="vertical"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content">
<TextViewAndroid:id="@+id/titleItem"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:textColor="#FFFFFFFF"
Android:textSize="13px"/>
<TextViewAndroid:id="@+id/infoItem"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:textColor="#FFFFFFFF"
Android:textSize="22px"/>
</LinearLayout>
<LinearLayoutAndroid:gravity="right"
Android:orientation="horizontal"android:layout_width="fill_parent"
Android:layout_height="wrap_content">
<CheckBoxAndroid:id="@+id/checkItem"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:layout_margin="5px"/>
<ButtonAndroid: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：

packagecom.myAndroid.test;
importjava.util.ArrayList;
importjava.util.HashMap;
importjava.util.List;
importjava.util.Map;
importAndroid.app.Activity;
importAndroid.app.AlertDialog;
importAndroid.content.DialogInterface;
importAndroid.os.Bundle;
importAndroid.view.View;
importAndroid.view.View.OnClickListener;
importAndroid.widget.ArrayAdapter;
importAndroid.widget.ImageButton;
importAndroid.widget.ListView;
publicclassMyListViewextendsActivity{
privateListViewlistView;
privateImageButtonimgbt_sum;
privateListViewAdapterlistViewAdapter;
privateList<Map<String,Object>>listItems;
privateInteger[]imgeIDs={R.drawable.cake,
R.drawable.gift,R.drawable.letter,
R.drawable.love,R.drawable.mouse,
R.drawable.music};
privateString[]goodsNames={"蛋糕","礼物",
"邮票","爱心","鼠标","音乐CD"};
privateString[]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。"};
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
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(newClickEvent());
listItems=getListItems();
listViewAdapter=newListViewAdapter(this,listItems);//创建适配器
listView.setAdapter(listViewAdapter);
}
/**
*初始化商品信息
*/
privateList<Map<String,Object>>getListItems(){
List<Map<String,Object>>listItems=newArrayList<Map<String,Object>>();
for(inti=0;i<goodsNames.length;i++){
Map<String,Object>map=newHashMap<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);
}
returnlistItems;
}
classClickEventimplementsOnClickListener{
@Override
publicvoidonClick(Viewv){
//TODOAuto-generatedmethodstub
StringgoodsList="";
for(inti=0;i<listItems.size();i++){
goodsList+=listViewAdapter.hasChecked(i)?goodsNames[i]+"":"";
}
newAlertDialog.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：

packagecom.myAndroid.test;
importjava.util.List;
importjava.util.Map;
importAndroid.app.AlertDialog;
importAndroid.content.Context;
importAndroid.util.Log;
importAndroid.view.LayoutInflater;
importAndroid.view.View;
importAndroid.view.ViewGroup;
importAndroid.widget.BaseAdapter;
importAndroid.widget.Button;
importAndroid.widget.CheckBox;
importAndroid.widget.CompoundButton;
importAndroid.widget.ImageView;
importAndroid.widget.ListView;
importAndroid.widget.TextView;
publicclassListViewAdapterextendsBaseAdapter{
privateContextcontext;//运行上下文
privateList<Map<String,Object>>listItems;//商品信息集合
privateLayoutInflaterlistContainer;//视图容器
privateboolean[]hasChecked;//记录商品选中状态
publicfinalclassListItemView{//自定义控件集合
publicImageViewimage;
publicTextViewtitle;
publicTextViewinfo;
publicCheckBoxcheck;
publicButtondetail;
}
publicListViewAdapter(Contextcontext,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=newboolean[getCount()];
}
publicintgetCount(){
//TODOAuto-generatedmethodstub
returnlistItems.size();
}
publicObjectgetItem(intarg0){
//TODOAuto-generatedmethodstub
returnnull;
}
publiclonggetItemId(intarg0){
//TODOAuto-generatedmethodstub
return0;
}
/**
*记录勾选了哪个物品
*@paramcheckedID选中的物品序号
*/
privatevoidcheckedChange(intcheckedID){
hasChecked[checkedID]=!hasChecked[checkedID];
}
/**
*判断物品是否选择
*@paramcheckedID物品序号
*@return返回是否选中状态
*/
publicbooleanhasChecked(intcheckedID){
returnhasChecked[checkedID];
}
/**
*显示物品详情
*@paramclickID
*/
privatevoidshowDetailInfo(intclickID){
newAlertDialog.Builder(context)
.setTitle("物品详情："+listItems.get(clickID).get("info"))
.setMessage(listItems.get(clickID).get("detail").toString())
.setPositiveButton("确定",null)
.show();
}
/**
*ListViewItem设置
*/
publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
//TODOAuto-generatedmethodstub
Log.e("method","getView");
finalintselectID=position;
//自定义视图
ListItemViewlistItemView=null;
if(convertView==null){
listItemView=newListItemView();
//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(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
//显示物品详情
showDetailInfo(selectID);
}
});
//注册多选框状态事件处理
listItemView.check
.setOnCheckedChangeListener(newCheckBox.OnCheckedChangeListener(){
@Override
publicvoidonCheckedChanged(CompoundButtonbuttonView,
booleanisChecked){
//记录物品选中状态
checkedChange(selectID);
}
});
returnconvertView;
}
}

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