android RadioGroup checkBox button application

The first step is to create an android project.

The second step is to modify the generated res/layout/main.xml

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< ;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

> height="wrap_content"

android:text="checkbox 1 "/& gt; & & lt; checkbox

Android: ID ="@+ID/Checkbox1 "

Android: layout_width =" wrap_content "

Android: layout_height =" wrap_ Content "d Android: text =" check Box 2" />

android:id="@+id/radioGroup"

android:orientation="vertical"

android:layout_width="fill _parent"

android:layout_height="fill_parent ">

                                                                                                                                                                         < ="Beijing" />

                                ; Radiobutton android: ID = "@+ID/randion2"

Android: layout_width = "wrap_content" android: layout_heigh_Content "

Android: Text = "Tianjin"/& GT;

& LT; Radiobutton android: ID = "@+ID/randion3"

Android: layout_width = "wrap_content" android: layout_heigh = "wrap_content"

Android: text = "Shanghai"/& & lti; obutton android: ID = "@+ID/randion4 "

Android: layout_width =" wrap_content "android: layout_height =" wrap_content "

Android: text =" Chongqing "/& LT;/Radiogroup & GT; /& Lt;/linearlayout & gt;

third step , add the main code

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import android.app.Activity;

import android.os.Bundle;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.CompoundButton.OnCheckedChangeListener; ity implements OnCheckedChangeListener {

 /** Called when the activity is first created.  */

    RadioButton  r1 = null;  

    RadioButton  r2 = null;  

    RadioButton  r3 = null;  

    RadioButton  r4 = null;  

    @Override  

    public void onCreate(Bundle savedInstanceState) {  

        super.onCreate(savedInstanceState);  

        setContentView(R.layout.main);  

        CheckBox checkBox = (CheckBox) findViewById(R.id.checkBox);   

        CheckBox checkBox1 = (CheckBox) findViewById(R.id.checkBox1);  

        //获得单选按钮组  

        RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radioGroup);  

        //获得单选按钮  

        r1 = (RadioButton )findViewById(R.id.radion1);  

        r2 = (RadioButton )findViewById(R.id.radion2);  

        r3 = (RadioButton )findViewById(R.id.radion3);  

        r4 = (RadioButton )findViewById(R.id.radion4);  

        checkBox.setChecked(true);   

        r1.setClickable(true);  

        //监听多选按钮  

        checkBox.setOnCheckedChangeListener(this);  

        checkBox1.setOnCheckedChangeListener(this);  

        //监听单选按钮  

        radioGroup.setOnCheckedChangeListener(mChangeRadio);  

    }