android 单选（RadioGroup ）复选（CheckBox）按钮的应用

第一步，还是创建android项目。

第二步，修改已经生成的res/layout/main.xml

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

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

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<CheckBox

android:id="@+id/checkBox"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="复选框1" />

<CheckBox

android:id="@+id/checkBox1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="复选框2" />

<RadioGroup

android:id="@+id/radioGroup"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<RadioButton android:id="@+id/radion1"

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

android:text="北京" />

<RadioButton android:id="@+id/radion2"

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

android:text="天津" />

<RadioButton android:id="@+id/radion3"

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

android:text="上海" />

<RadioButton android:id="@+id/radion4"

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

android:text="重庆" />

</RadioGroup>

</LinearLayout>

第三步，添加主要代码

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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;

public class checkBox extends Activity 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);

}