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

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

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/sex" />

    <RadioGroup

        android:id="@+id/sex"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" >

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="@string/boy" />

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="@string/girl" />

    </RadioGroup>

    <Button

        android:id="@+id/btn"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/btnSel" />

</LinearLayout>

package com.skycc.radio;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.Toast;

/**

 * 

 * @Description: 单选按钮练习

 * @author:skycc

 * @time:2014-4-10 下午3:53:15

 */

public class MainActivity extends Activity {

    private Button button;

    private RadioGroup group;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main_layout);

        button = (Button) this.findViewById(R.id.btn);

        group = (RadioGroup) this.findViewById(R.id.sex);

        button.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                int len = group.getChildCount();//获取这个group中的radio数

                String msgString = "";

                for (int i = 0; i < len; i++) {

                    RadioButton radioButton = (RadioButton) group.getChildAt(i);//将每个group中的radio进行遍历，并判断是否被选中

                    if (radioButton.isChecked()) {

                        msgString = "选中了性别" + radioButton.getText().toString();

                        break;

                    }

                }

                Toast.makeText(MainActivity.this, msgString, 1).show();

            }

        });

    }

}