android学习日记03--常用控件checkbox/radiobutton

常用控件
3、checkbox

　　复选框，确定是否勾选,点击一下勾选，点击第二下取消，当有一系列备选项时适合用checkbox控件，方便用户提交数据。

贴上例子Activity的java代码

 1 package com.example.checkbox;
 2 
 3 import android.os.Bundle;
 4 import android.app.Activity;
 5 import android.view.Menu;
 6 import android.widget.CheckBox;
 7 import android.widget.CompoundButton;
 8 import android.widget.Toast;
 9 import android.widget.CompoundButton.OnCheckedChangeListener;
10 import android.widget.TextView;
11 
12 public class MainActivity extends Activity implements OnCheckedChangeListener{
13 
14     private CheckBox cb1,cb2,cb3;
15     private TextView tv;
16     
17     @Override
18     protected void onCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20         setContentView(R.layout.activity_main);
21         
22         cb1 = (CheckBox)findViewById(R.id.cb1);
23         cb2 = (CheckBox)findViewById(R.id.cb2);
24         cb3 = (CheckBox)findViewById(R.id.cb3);
25         
26         cb1.setOnCheckedChangeListener(this);
27         cb2.setOnCheckedChangeListener(this);
28         cb3.setOnCheckedChangeListener(this);
29         
30         tv = (TextView)findViewById(R.id.tv);
31     }
32 
33 
34     @Override
35     public boolean onCreateOptionsMenu(Menu menu) {
36         // Inflate the menu; this adds items to the action bar if it is present.
37         getMenuInflater().inflate(R.menu.main, menu);
38         return true;
39     }
40 
41 
42     @Override
43     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
44         // TODO Auto-generated method stub
45         if(cb1 == buttonView||cb2 == buttonView||cb3 == buttonView) {
46             if(isChecked) {
47                 showToast(buttonView.getText()+"选中");
48             } else {
49                 showToast(buttonView.getText()+"取消");
50             }
51         }
52             
53     }
54     
55     public void showToast(String str) {
56         Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
57     }
58     
59 }

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