RadioButton控件

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Radio控件

1、XML文件：<RadioButton/> 和 <RadioGroup/>

2、代码：RadioButton 和RadioGroup

3、OnClickListener 与 OnCheckedChangeListener 监听器

设置两组RadioGroup 当选中A时，自动选中C，当选中B时，自动选中D

activity_main.xml 代码如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context=".MainActivity" >    <RadioGroup        android:id="@+id/radioGroupABId"         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal">        <RadioButton             android:id="@+id/aButtonId"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="A"/>         <RadioButton             android:id="@+id/bButtonId"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="B"/>    </RadioGroup>    <RadioGroup        android:id="@+id/radioGroupCDId"         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal">        <RadioButton             android:id="@+id/cButtonId"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="C"/>         <RadioButton             android:id="@+id/dButtonId"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="D"/>    </RadioGroup></LinearLayout>

MainActivity.java 代码如下：

package com.wyb.se01_e10_radio;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;public class MainActivity extends Activity {private RadioGroup radioGroupAB;private RadioGroup radioGroupCD;private RadioButton aButton;private RadioButton bButton;private RadioButton cButton;private RadioButton dButton;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);radioGroupAB = (RadioGroup)findViewById(R.id.radioGroupABId);aButton = (RadioButton)findViewById(R.id.aButtonId);bButton = (RadioButton)findViewById(R.id.bButtonId);cButton = (RadioButton)findViewById(R.id.cButtonId);dButton = (RadioButton)findViewById(R.id.dButtonId);RadioGroupListener listener = new RadioGroupListener();radioGroupAB.setOnCheckedChangeListener(listener);}class RadioGroupListener implements OnCheckedChangeListener{@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {// TODO Auto-generated method stubif (checkedId == aButton.getId()){cButton.setChecked(true);}else if (checkedId == bButton.getId()){dButton.setChecked(true);}}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

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