1 package com.demo;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.view.Gravity;
 6 import android.view.View;
 7 import android.view.View.OnClickListener;
 8 import android.widget.CheckBox;
 9 import android.widget.ImageButton;
10 import android.widget.Toast;
11 
12 public class Demo04 extends Activity {
13     /** Called when the activity is first created. */
14     @Override
15     public void onCreate(Bundle savedInstanceState) {
16         super.onCreate(savedInstanceState);
17         setContentView(R.layout.main);
18         
19         // 获取按钮
20         ImageButton btnOK = (ImageButton) this.findViewById(R.id.btnOK);
21         // 为按钮的单击定义响应事件的类
22         btnOK.setOnClickListener(OnBtnOKClick);   
23     }
24     
25     // 定义一个处理按钮单击事件的类
26     private OnClickListener OnBtnOKClick = new OnClickListener()
27     {
28         // 在类中定义单击事件的处理函数
29         public void onClick(View v)
30         {           
31             String str = "";
32             CheckBox cbxGroup = (CheckBox) Demo04.this.findViewById(R.id.cbxGroup);
33             CheckBox cbxSingle = (CheckBox) Demo04.this.findViewById(R.id.cbxSingle);
34             
35             if(!cbxGroup.isChecked() && !cbxSingle.isChecked())
36                 str = "您至少要选择一个答案！";
37             
38             if(cbxGroup.isChecked())
39                 str = "您喜欢的旅游方式为：【随团旅游】";
40             if(cbxSingle.isChecked())
41             {
42                 if(str.length()>0)
43                     str += "和【自助游】";
44                 else
45                     str = "您喜欢的旅游方式为：【自助游】";
46             }
47             
48             Toast toast = Toast.makeText(Demo04.this, str, Toast.LENGTH_SHORT);
49             toast.setGravity(Gravity.CENTER, 0, 0); 
50             toast.show();
51         }
52     };
53 }