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>