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

<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:padding="10dp"

    android:orientation="vertical"

    tools:context="com.hanqi.application3.UIActivity1"

    android:weightSum="1">

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="请选择Android的开发语言是什么"/>

    <RadioGroup

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal"

        android:id="@+id/rb"

        >

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="C++"

            android:id="@+id/rb1"

            android:layout_marginRight="30dp"

            android:checked="true"

            />

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="C"

            android:id="@+id/rb2"

            android:layout_marginRight="30dp"

            />

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="JAVA"

            android:id="@+id/rb3"

            android:layout_marginRight="30dp"

            />

        <RadioButton

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="C#"

            android:id="@+id/rb4"

            android:layout_marginRight="30dp"

            />

    </RadioGroup>

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="请选择字体效果"/>

    <CheckBox

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="宋体"

        android:id="@+id/cb_st"

        android:checked="true"

        />

    <CheckBox

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="加粗"

        android:id="@+id/cb_jc"

        />

    <CheckBox

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="斜体"

        android:id="@+id/cb_xt"

        />

    <CheckBox

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="下划线"

        android:id="@+id/cb_xhx"

        />

</LinearLayout>

package com.hanqi.application3;

import android.app.Activity;

import android.os.Bundle;

import android.support.annotation.IdRes;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.Toast;

import static android.widget.CompoundButton.*;

public class UIActivity1 extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_ui1);

        RadioGroup radioGroup = (RadioGroup)findViewById(R.id.rb);

        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {

                if (checkedId == R.id.rb3) {

                    Toast.makeText(UIActivity1.this, "选对了", Toast.LENGTH_SHORT).show();

                }

                RadioButton rb = (RadioButton) findViewById(checkedId);

                Toast.makeText(UIActivity1.this, rb.getText(), Toast.LENGTH_SHORT).show();

            }

        });

        CheckBox cb_st= (CheckBox)findViewById(R.id.cb_st);

        cb_st.setOnCheckedChangeListener(new CBOnCheckChangeListenter());

        CheckBox cb_xt= (CheckBox)findViewById(R.id.cb_xt);

        cb_xt.setOnCheckedChangeListener(new CBOnCheckChangeListenter());

        CheckBox cb_jc= (CheckBox)findViewById(R.id.cb_jc);

        cb_jc.setOnCheckedChangeListener(new CBOnCheckChangeListenter());

        CheckBox cb_xhx= (CheckBox)findViewById(R.id.cb_xhx);

        cb_xhx.setOnCheckedChangeListener(new CBOnCheckChangeListenter());

    }

    private class CBOnCheckChangeListenter implements OnCheckedChangeListener

    {

        @Override

        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            CheckBox cb = (CheckBox)buttonView;

            if (isChecked) {

                Toast.makeText(UIActivity1.this, "选中了", Toast.LENGTH_SHORT).show();

            }

            else

            {

                Toast.makeText(UIActivity1.this, "取消了", Toast.LENGTH_SHORT).show();

            }

        }

    }

}