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：
01
<?xml version="1.0" encoding="utf-8"?>
02
<LinearLayout
03
xmlns:android="http://schemas.android.com/apk/res/android"
04
android:orientation="vertical"
05
android:layout_width="fill_parent"
06
android:layout_height="fill_parent">
07
<LinearLayout
08
android:layout_width="fill_parent"
09
android:layout_height="wrap_content"
10
android:orientation="horizontal"
11
android:descendantFocusability="blocksDescendants">
12
<CheckBox
13
android:id="@+id/list.select"
14
android:layout_width="wrap_content"
15
android:layout_height="wrap_content"/>
16
<TextView
17
android:id="@+id/list.name"
18
android:layout_width="fill_parent"
19
android:layout_height="wrap_content"
20
android:layout_weight="1"
21
android:text="Name"
22
android:layout_gravity="center"
23
android:textSize="20dp"
24
android:layout_marginLeft="10dp"/>
25
<TextView
26
android:id="@+id/list.address"
27
android:layout_width="fill_parent"
28
android:layout_height="wrap_content"
29
android:layout_weight="1"
30
android:text="Address"
31
android:layout_gravity="center"
32
android:textSize="20dp"/>
33
</LinearLayout>
34
</LinearLayout>
[3] main.xml布局文件源码如下：
01
<?xml version="1.0" encoding="utf-8"?>
02
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
03
android:orientation="vertical"
04
android:layout_width="fill_parent"
05
android:layout_height="fill_parent">
06
<Button
07
android:id="@+id/show"
08
android:layout_width="fill_parent"
09
android:layout_height="wrap_content"
10
android:text="Show"/>
11
<ListView
12
android:id="@+id/lvperson"
13
android:layout_width="fill_parent"
14
android:layout_height="fill_parent"/>
15
</LinearLayout>
[4] Person.java实体类源码如下：
01
package com.andyidea.bean;
02
03
public class Person {
04
05
private String name;
06
private String address;
07
08
public String getName() {
09
return name;
10
}
11
public void setName(String name) {
12
this.name = name;
13
}
14
public String getAddress() {
15
return address;
16
}
17
public void setAddress(String address) {
18
this.address = address;
19
}
20
21
}
[5] MainActivity.java类源码如下：
001
package com.andyidea.listview;
002
003
import java.util.ArrayList;
004
import java.util.HashMap;
005
import java.util.List;
006
007
import com.andyidea.bean.Person;
008
009
import android.app.Activity;
010
import android.app.AlertDialog;
011
import android.content.Context;
012
import android.os.Bundle;
013
import android.util.Log;
014
import android.view.LayoutInflater;
015
import android.view.View;
016
import android.view.ViewGroup;
017
import android.widget.BaseAdapter;
018
import android.widget.Button;
019
import android.widget.CheckBox;
020
import android.widget.ListView;
021
import android.widget.TextView;
022
023
public class MainActivity extends Activity {
024
025
Button show;
026
ListView lv;
027
List<Person> persons = new ArrayList<Person>();
028
Context mContext;
029
MyListAdapter adapter;
030
List<Integer> listItemID = new ArrayList<Integer>();
031
032
/** Called when the activity is first created. */
033
@Override
034
public void onCreate(Bundle savedInstanceState) {
035
super.onCreate(savedInstanceState);
036
setContentView(R.layout.main);
037
mContext = getApplicationContext();
038
show = (Button)findViewById(R.id.show);
039
lv = (ListView)findViewById(R.id.lvperson);
040
041
initPersonData();
042
adapter = new MyListAdapter(persons);
043
lv.setAdapter(adapter);
044
045
show.setOnClickListener(new View.OnClickListener() {
046
047
@Override
048
public void onClick(View v) {
049
050
listItemID.clear();
051
for(int i=0;i<adapter.mChecked.size();i++){
052
if(adapter.mChecked.get(i)){
053
listItemID.add(i);
054
}
055
}
056
057
if(listItemID.size()==0){
058
AlertDialog.Builder builder1 = newAlertDialog.Builder(MainActivity.this);
059
builder1.setMessage("没有选中任何记录");
060
builder1.show();
061
}else{
062
StringBuilder sb = new StringBuilder();
063
064
for(int i=0;i<listItemID.size();i++){
065
sb.append("ItemID="+listItemID.get(i)+" . ");
066
}
067
AlertDialog.Builder builder2 = newAlertDialog.Builder(MainActivity.this);
068
builder2.setMessage(sb.toString());
069
builder2.show();
070
}
071
}
072
});
073
}
074
075
/**
076
* 模拟数据
077
*/
078
private void initPersonData(){
079
Person mPerson;
080
for(int i=1;i<=12;i++){
081
mPerson = new Person();
082
mPerson.setName("Andy"+i);
083
mPerson.setAddress("GuangZhou"+i);
084
persons.add(mPerson);
085
}
086
}
087
088
//自定义ListView适配器
089
class MyListAdapter extends BaseAdapter{
090
List<Boolean> mChecked;
091
List<Person> listPerson;
092
HashMap<Integer,View> map = new HashMap<Integer,View>();
093
094
public MyListAdapter(List<Person> list){
095
listPerson = new ArrayList<Person>();
096
listPerson = list;
097
098
mChecked = new ArrayList<Boolean>();
099
for(int i=0;i<list.size();i++){
100
mChecked.add(false);
101
}
102
}
103
104
@Override
105
public int getCount() {
106
return listPerson.size();
107
}
108
109
@Override
110
public Object getItem(int position) {
111
return listPerson.get(position);
112
}
113
114
@Override
115
public long getItemId(int position) {
116
return position;
117
}
118
119
@Override
120
public View getView(int position, View convertView, ViewGroup parent) {
121
View view;
122
ViewHolder holder = null;
123
124
if (map.get(position) == null) {
125
Log.e("MainActivity","position1 = "+position);
126
127
LayoutInflater mInflater = (LayoutInflater) mContext
128
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
129
view = mInflater.inflate(R.layout.listitem, null);
130
holder = new ViewHolder();
131
holder.selected = (CheckBox)view.findViewById(R.id.list_select);
132
holder.name = (TextView)view.findViewById(R.id.list_name);
133
holder.address = (TextView)view.findViewById(R.id.list_address);
134
final int p = position;
135
map.put(position, view);
136
holder.selected.setOnClickListener(newView.OnClickListener() {
137
138
@Override
139
public void onClick(View v) {
140
CheckBox cb = (CheckBox)v;
141
mChecked.set(p, cb.isChecked());
142
}
143
});
144
view.setTag(holder);
145
}else{
146
Log.e("MainActivity","position2 = "+position);
147
view = map.get(position);
148
holder = (ViewHolder)view.getTag();
149
}
150
151
holder.selected.setChecked(mChecked.get(position));
152
holder.name.setText(listPerson.get(position).getName());
153
holder.address.setText(listPerson.get(position).getAddress());
154
155
return view;
156
}
157
158
}
159
160
static class ViewHolder{
161
CheckBox selected;
162
TextView name;
163
TextView address;
164
}
165
}
[6] 程序运行后的结果如下：
