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>