<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:orientation="vertical"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <RadioGroup

        android:id="@+id/radioGroup1"

        android:layout_width="wrap_content"

        android:orientation="horizontal"

        android:layout_height="wrap_content" >

        <RadioButton

            android:id="@+id/radio0"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:checked="true"

            android:text="男" />

        <RadioButton

            android:id="@+id/radio1"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="女" />

    </RadioGroup>

</LinearLayout>

package com.example.test2;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.RadioGroup;

import android.widget.RadioGroup.OnCheckedChangeListener;

public class MainActivity extends Activity implements OnCheckedChangeListener {

    private Button login_button;

    private Button reset;

    private RadioGroup rg;

    private Button other;

    private CheckBox checkBox1;

    private Button myButton;

    /*

     * @Override protected void onCreate(Bundle savedInstanceState) {

     * super.onCreate(savedInstanceState);

     * setContentView(R.layout.activity_radiobutton);

     *

     * login_button = (Button) this.findViewById(R.id.loginButton); checkBox1 =

     * (CheckBox) findViewById(R.id.checkBox1);

     * checkBox1.setOnCheckedChangeListener(new OnCheckedChangeListener() {

     *

     * @Override public void onCheckedChanged(CompoundButton arg0, boolean arg1)

     * { // arg1代表是否选中 Log.i("tag", arg1 + ""); if (arg1) { Log.i("tag",

     * checkBox1.getText().toString()); }

     *

     * } }); }

     */

    // 单选框

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_radiobutton);

        rg = (RadioGroup) this.findViewById(R.id.radioGroup1);

        rg.setOnCheckedChangeListener(this);

    }

    @Override

    public 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;

    }

    @Override

    public void onCheckedChanged(RadioGroup arg0, int checkId) {

        // TODO Auto-generated method stub

        switch(checkId){

        case R.id.radio0:

            Log.i("tag", "当前选中男");

            break ;

        case R.id.radio1:

            Log.i("tag", "当前选中女");

            break ;

        default:

            break ;

        }

    }

}