Android基本组件05（RadioGroup）

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//ActivityRadioGroup.javapackage android.ActivityUI;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.RadioGroup;public class ActivityRadioGroup extends Activity implements View.OnClickListener{RadioGroup mRadioGroup;public void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.radiogroup);mRadioGroup = (RadioGroup)findViewById(R.id.radio_group);Button radiogroup_clear = (Button)findViewById(R.id.radiogroup_clear);radiogroup_clear.setOnClickListener(this);}public void onClick(View v){mRadioGroup.clearCheck();}}//radiogroup.xml<?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">  <RadioGroupandroid:orientation="vertical"android:id="@+id/radio_group"android:layout_width="wrap_content"android:layout_height="wrap_content"android:checkedButton="@+id/lunch"><RadioButtonandroid:id="@+id/breakfast"android:text="breakdfast"/><RadioButtonandroid:id="@+id/lunch"android:text="lunch"/><RadioButtonandroid:id="@+id/dinner"android:text="dinner"/><RadioButtonandroid:id="@+id/all"android:text="all"/></RadioGroup><Buttonandroid:id="@+id/radiogroup_clear"android:text="clear"android:layout_width="wrap_content"android:layout_height="wrap_content"/></LinearLayout>
点击clear按钮：