android 多选按钮CheckBox的使用

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.sadhu.s01_e09_checkbox.MainActivity$PlaceholderFragment" >

<CheckBox
android:id="@+id/eatId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="吃饭" />
<CheckBox
android:id="@+id/sleepId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="睡觉" />
<CheckBox
android:id="@+id/dotaId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dota" />
<CheckBox
android:id="@+id/allCheckedBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="全选"></CheckBox>

</LinearLayout>

package com.sadhu.s01_e09_checkbox;

import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.view.View.OnClickListener;

public class MainActivity extends Activity {
//定义三个变量
private CheckBox eatBox;
private CheckBox sleepBox;
private CheckBox dotaBox;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);

//找到三个对象并赋值到相应的变量
eatBox = (CheckBox)findViewById(R.id.eatId);
sleepBox =  (CheckBox)findViewById(R.id.sleepId);
dotaBox = (CheckBox)findViewById(R.id.dotaId);

//选中状态发生改变后执行此监听器，两个参数，一个是对象，一个是是否选中。CompoundButton是CheckBox的超类
CheckBoxListener cbListener = new C
7fe0
heckBoxListener();
eatBox.setOnCheckedChangeListener(cbListener);
sleepBox.setOnCheckedChangeListener(cbListener);
dotaBox.setOnCheckedChangeListener(cbListener);

//为全选按钮定义一个改变状态触发的监听器
((CheckBox)findViewById(R.id.allCheckedBox)).setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton checkBox, boolean isChecked) {
eatBox.setChecked(isChecked);
sleepBox.setChecked(isChecked);
dotaBox.setChecked(isChecked);
}
});;

/*
//实例化点击事件监听类
OnBoxClickListener onBoxClick = new OnBoxClickListener();
//为三个对象设置点击事件
eatBox.setOnClickListener(onBoxClick);
sleepBox.setOnClickListener(onBoxClick);
dotaBox.setOnClickListener(onBoxClick);*/

}
//定义一个选中状态发生改变就会执行此类
class CheckBoxListener implements OnCheckedChangeListener
{

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(buttonView.getId()==R.id.eatId){
System.out.println("eatBox");
}
else if(buttonView.getId()==R.id.sleepId){
System.out.println("sleepBox");
}
else if(buttonView.getId()==R.id.dotaId)
{
System.out.println("dotaBox");
}
if(isChecked)
{
System.out.println("checked");
}
else
{
System.out.println("unchecked");
}
}

}

//定义一个单击事件监听类
/*
class OnBoxClickListener implements OnClickListener {

@Override
public void onClick(View view)
{
CheckBox box = (CheckBox)view;
if(box.getId()==R.id.eatId)
{
System.out.println("eatBox");
}
else if(box.getId()==R.id.sleepId)
{
System.out.println("sleepBox");
}
else if(box.getId()==R.id.dotaId)
{
System.out.println("dotaBox");
}
if(box.isChecked())
{
System.out.println("checked");
}
else
{
System.out.println("unchecked");
}
}
}*/

@Override
public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {

public PlaceholderFragment() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}

}

多选按钮CheckBox很简单，就是为用户提供多选功能，他有两个监听器，一个是单击（OnClickListener）控件触发的监听器，一个是按钮选中状态发生改变后执行的监听器（OnCheckedChangeListener）。