ListView+CheckBox实现全选 单击效果
在网上也找了一些案例,但都是用Map来实现的.我的是把对象绑定到当前控件上.代码稍微简洁.
main布局文件:main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/tv"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical" />
<LinearLayout
android:id="@+id/line"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:layout_below="@+id/tv"
android:orientation="horizontal" >
<Button
android:id="@+id/bt_selectall"
android:layout_width="80dp"
android:layout_height="fill_parent"
android:text="全选" />
<Button
android:id="@+id/bt_deselectall"
android:layout_width="80dp"
android:layout_height="fill_parent"
android:text="取消选择" />
</LinearLayout>
<ListView
android:id="@+id/lv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/line" />
</RelativeLayout>ListItem布局文件:listviewitem.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/item_tv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1" />
<CheckBox
android:id="@+id/item_cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="center_vertical" />
</LinearLayout>实体类:Person.java
package com.example.listview_checkbox;
public class Person {
private int id;
private String name;
private boolean selected;
public Person(int id, String name, boolean selected) {
super();
this.id = id;
this.name = name;
this.selected = selected;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}MainActivity.java
package com.example.listview_checkbox;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity{
private List<Person> listPerson;
private List<Person> selectPerson=new ArrayList<Person>();
private MyAdapter mAdapter;
private TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView listView=(ListView) findViewById(R.id.lv);
listPerson = new ArrayList<Person>();
initDate();
listView.setAdapter(mAdapter=new MyAdapter());
Button btSelectall=(Button) findViewById(R.id.bt_selectall);
btSelectall.setOnClickListener(clickListener);
Button btDeselectall=(Button) findViewById(R.id.bt_deselectall);
btDeselectall.setOnClickListener(clickListener);
tv=(TextView) findViewById(R.id.tv);
}
// 初始化数据
private void initDate() {
for (int i = 0; i < 15; i++) {
Person person=new Person(i, "复选框"+i, false);
listPerson.add(person);
}
}
private class MyAdapter extends BaseAdapter{
@Override
public int getCount() {
return listPerson.size();
}
@Override
public Object getItem(int position) {
return listPerson.get(position);
}
@Override
public long getItemId(int position) {
return listPerson.get(position).getId();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
// 获得ViewHolder对象
holder = new ViewHolder();
// 导入布局并赋值给convertview
convertView=View.inflate(MainActivity.this, R.layout.listviewitem, null);
holder.tv = (TextView) convertView.findViewById(R.id.item_tv);
holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);
// 为view设置标签
convertView.setTag(holder);
} else {
// 取出holder
holder = (ViewHolder) convertView.getTag();
}
Person person=listPerson.get(position);
// 设置list中TextView的显示
holder.tv.setText(person.getName());
// 根据isSelected来设置checkbox的选中状况
holder.cb.setChecked(person.isSelected());
holder.cb.setTag(person);
holder.cb.setOnClickListener(clickListener);
return convertView;
}
public class ViewHolder {
TextView tv;
CheckBox cb;
}
}
private OnClickListener clickListener=new OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.item_cb:
Person person = (Person) v.getTag();
person.setSelected(!person.isSelected());
if (person.isSelected()) {
selectPerson.add(person);
}else {
selectPerson.remove(person);
}
tv.setText("您选中了"+selectPerson.size()+"条数据!!");
break;
case R.id.bt_selectall:
selected(true);
break;
case R.id.bt_deselectall:
selected(false);
break;
default:
break;
}
}
};
private void selected(boolean selected){//选择或者取消选中
selectPerson.clear();
for(int i=0;i<listPerson.size();i++){
Person person=listPerson.get(i);
person.setSelected(selected);
if(selected==true){
selectPerson.add(person);
}
}
mAdapter.notifyDataSetChanged();
tv.setText("您选中了"+selectPerson.size()+"条数据!!");
}
}
效果图如下:
