Android学习笔记——CheckBox

该工程的功能实现在一个activity中显示一个单选框和一个多选框

以下代码是MainActivity.java文件中的代码

package com.example.checkbox;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends Activity {
//对控件对象进行声明
private RadioGroup gendergroup = null;
private RadioButton femaleButton = null;
private RadioButton maleButton = null;
private CheckBox swimBox = null;
private CheckBox runBox = null;
private CheckBox readBox = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//通过控件的ID来得到代表控件的对象
gendergroup = (RadioGroup)findViewById(R.id.genderGroup);
femaleButton = (RadioButton)findViewById(R.id.femaleButton);
maleButton = (RadioButton)findViewById(R.id.maleButton);
swimBox = (CheckBox)findViewById(R.id.swim);
runBox = (CheckBox)findViewById(R.id.run);
readBox = (CheckBox)findViewById(R.id.read);
//设置监听器
gendergroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
if(femaleButton.getId() == checkedId){
System.out.println("female");
Toast.makeText(MainActivity.this, "female", Toast.LENGTH_SHORT).show();
}
else if(maleButton.getId() == checkedId)
{
System.out.println("male");
Toast.makeText(MainActivity.this, "male", Toast.LENGTH_SHORT).show();
}
}
});
//为多选按钮添加监听器
swimBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked)
{
System.out.println("swim is checked");
}
else
{
System.out.println("swim is unchecked");
}
}
});
runBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked)
{
System.out.println("run is checked");
}
else
{
System.out.println("run is unchecked");
}
}
});
readBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked)
{
System.out.println("read is checked");
}
else
{
System.out.println("read is unchecked");
}
}
});
}
}

以下代码是activity_main.xml文件中的代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >

<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello_world" />

<RadioGroup
android:id="@+id/genderGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
>

<RadioButton
android:id="@+id/femaleButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/female"
/>

<RadioButton
android:id="@+id/maleButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/male"
/>
</RadioGroup>

<CheckBox
android:id="@+id/swim"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/swim"
/>
<CheckBox
android:id="@+id/run"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/run"
/>
<CheckBox
android:id="@+id/read"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/read"
/>

</LinearLayout>

以下代码是string.xml文件中的代码

<?xml version="1.0" encoding="utf-8"?>
<resources>

<string name="app_name">CheckBox</string>
<string name="hello_world">Hello world!</string>
<string name="female">女</string>
<string name="male">男</string>
<string name="swim">游泳</string>
<string name="run">跑步</string>
<string name="read">读书</string>
</resources>