1 package com.demo;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.widget.RadioButton;
 6 import android.widget.RadioGroup;
 7 import android.widget.TextView;
 8 import android.widget.RadioGroup.OnCheckedChangeListener;
 9 
10 public class Demo02 extends Activity {
11     
12     // 定义四个RadioButtom
13     RadioButton optionBenz;
14     RadioButton optionBMW;
15     RadioButton optionAudi;
16     RadioButton optionAlto;
17     
18     // 定义评论的文本
19     TextView tvSummary;
20     
21     /** Called when the activity is first created. */
22     @Override
23     public void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.main);
26         
27         optionBenz = (RadioButton) this.findViewById(R.id.optBenz);
28         optionBMW = (RadioButton) this.findViewById(R.id.optBMW);
29         optionAudi = (RadioButton) this.findViewById(R.id.optAudi);
30         optionAlto = (RadioButton) this.findViewById(R.id.optAlto);
31         tvSummary = (TextView) this.findViewById(R.id.lbSummary);
32         
33         // 为RadioGroup注册OnCheckedChangeListener事件的处理类
34         RadioGroup rgpAnswer = (RadioGroup) this.findViewById(R.id.rgpAnswer);
35         rgpAnswer.setOnCheckedChangeListener(OnRadioButtonClick);
36     }
37     
38     private OnCheckedChangeListener OnRadioButtonClick = new OnCheckedChangeListener()
39     {
40         // 当选择不同的选项时，会给出不同的评语
41         public void onCheckedChanged(RadioGroup group, int checkedId)
42         {            
43             if(checkedId == optionBenz.getId())
44             {
45                 tvSummary.setText("哇，真有钱");
46             }
47             if(checkedId == optionBMW.getId())
48             {
49                 tvSummary.setText("嗯，有品位");
50             }
51             if(checkedId == optionAudi.getId())
52             {
53                 tvSummary.setText("嗯，有深度");
54             }
55             if(checkedId == optionAlto.getId())
56             {
57                 tvSummary.setText("哎，没追求");
58             }
59         }
60     };
61 }