Android中ListView结合CheckBox判断选中项

本文主要实现在自定义的ListView布局中加入CheckBox控件，通过判断用户是否选中CheckBox来对ListView的选中项进行相应的操作。通过一个Demo来展示该功能，选中ListView中的某一项，然后点击Button按钮来显示选中了哪些项。

[1] 程序结构图如下：

其中Person.java是实体类，MainActivity.java是Activity组件类。listitem.xml是自定义的列表每项布局文件。

[2] listitem.xml布局文件源码如下：

[html] view plain copy

<?xmlversion="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">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:descendantFocusability="blocksDescendants">
<CheckBox
android:id="@+id/list.select"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/list.name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Name"
android:layout_gravity="center"
android:textSize="20dp"
android:layout_marginLeft="10dp"/>
<TextView
android:id="@+id/list.address"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Address"
android:layout_gravity="center"
android:textSize="20dp"/>
</LinearLayout>
</LinearLayout>

[3] main.xml布局文件源码如下： [html] view plain copy

<?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">
<Button
android:id="@+id/show"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Show"/>
<ListView
android:id="@+id/lvperson"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>

[4] Person.java实体类源码如下： [html] view plain copy

packagecom.andyidea.bean;
publicclassPerson{
privateStringname;
privateStringaddress;
publicStringgetName(){
returnname;
}
publicvoidsetName(Stringname){
this.name=name;
}
publicStringgetAddress(){
returnaddress;
}
publicvoidsetAddress(Stringaddress){
this.address=address;
}
}

[5] MainActivity.java类源码如下： [html] view plain copy

packagecom.andyidea.listview;
importjava.util.ArrayList;
importjava.util.HashMap;
importjava.util.List;
importcom.andyidea.bean.Person;
importandroid.app.Activity;
importandroid.app.AlertDialog;
importandroid.content.Context;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseAdapter;
importandroid.widget.Button;
importandroid.widget.CheckBox;
importandroid.widget.ListView;
importandroid.widget.TextView;
publicclassMainActivityextendsActivity{
Buttonshow;
ListViewlv;
List<Person>persons=newArrayList<Person>();
ContextmContext;
MyListAdapteradapter;
List<Integer>listItemID=newArrayList<Integer>();
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mContext=getApplicationContext();
show=(Button)findViewById(R.id.show);
lv=(ListView)findViewById(R.id.lvperson);
initPersonData();
adapter=newMyListAdapter(persons);
lv.setAdapter(adapter);
show.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
listItemID.clear();
for(inti=0;i<adapter.mChecked.size();i++){
if(adapter.mChecked.get(i)){
listItemID.add(i);
}
}
if(listItemID.size()==0){
AlertDialog.Builderbuilder1=newAlertDialog.Builder(MainActivity.this);
builder1.setMessage("没有选中任何记录");
builder1.show();
}else{
StringBuildersb=newStringBuilder();
for(inti=0;i<listItemID.size();i++){
sb.append("ItemID="+listItemID.get(i)+".");
}
AlertDialog.Builderbuilder2=newAlertDialog.Builder(MainActivity.this);
builder2.setMessage(sb.toString());
builder2.show();
}
}
});
}
/**
*模拟数据
*/
privatevoidinitPersonData(){
PersonmPerson;
for(inti=1;i<=12;i++){
mPerson=newPerson();
mPerson.setName("Andy"+i);
mPerson.setAddress("GuangZhou"+i);
persons.add(mPerson);
}
}
//自定义ListView适配器
classMyListAdapterextendsBaseAdapter{
List<Boolean>mChecked;
List<Person>listPerson;
HashMap<Integer,View>map=newHashMap<Integer,View>();
publicMyListAdapter(List<Person>list){
listPerson=newArrayList<Person>();
listlistPerson=list;
mChecked=newArrayList<Boolean>();
for(inti=0;i<list.size();i++){
mChecked.add(false);
}
}
@Override
publicintgetCount(){
returnlistPerson.size();
}
@Override
publicObjectgetItem(intposition){
returnlistPerson.get(position);
}
@Override
publiclonggetItemId(intposition){
returnposition;
}
@Override
publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
Viewview;
ViewHolderholder=null;
if(map.get(position)==null){
Log.e("MainActivity","position1="+position);
LayoutInflatermInflater=(LayoutInflater)mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view=mInflater.inflate(R.layout.listitem,null);
holder=newViewHolder();
holder.selected=(CheckBox)view.findViewById(R.id.list_select);
holder.name=(TextView)view.findViewById(R.id.list_name);
holder.address=(TextView)view.findViewById(R.id.list_address);
finalintp=position;
map.put(position,view);
holder.selected.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
CheckBoxcb=(CheckBox)v;
mChecked.set(p,cb.isChecked());
}
});
view.setTag(holder);
}else{
Log.e("MainActivity","position2="+position);
view=map.get(position);
holder=(ViewHolder)view.getTag();
}
holder.selected.setChecked(mChecked.get(position));
holder.name.setText(listPerson.get(position).getName());
holder.address.setText(listPerson.get(position).getAddress());
returnview;
}
}
staticclassViewHolder{
CheckBoxselected;
TextViewname;
TextViewaddress;
}
}

[6] 程序运行后的结果如下：

文章出处：http://blog.csdn.net/cjjky/article/details/6967219

Android中ListView结合CheckBox判断选中项

Android中ListView结合CheckBox判断选中项

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