Android 单选按钮Radio的使用

布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <RadioGroup        android:id="@+id/radio_group_id"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <RadioButton            android:id="@+id/male_id"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="男" />        <RadioButton            android:id="@+id/female_id"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="女" />    </RadioGroup></LinearLayout>

控制文件

package com.geoffrey.practice_radio;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;public class MainActivity extends ActionBarActivity {private RadioGroup radioGroup;private RadioButton maleRadioButton;private RadioButton femaleRadioButton;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_radio);radioGroup = (RadioGroup) findViewById(R.id.radio_group_id);maleRadioButton = (RadioButton) findViewById(R.id.male_id);femaleRadioButton = (RadioButton) findViewById(R.id.female_id);RadioGroupListener listener = new RadioGroupListener();radioGroup.setOnCheckedChangeListener(listener);}class RadioGroupListener implements OnCheckedChangeListener {@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {if (checkedId == maleRadioButton.getId()) {System.out.println("选择男");} else if (checkedId == femaleRadioButton.getId()) {System.out.println("选择女");}}}}

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