anroid的checkbox

1.layout代码

<RelativeLayout 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: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" >

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="17dp"
        android:text="篮球" />

    <CheckBox
        android:id="@+id/checkBox2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/checkBox1"
        android:layout_below="@+id/checkBox1"
        android:text="足球" />

    <CheckBox
        android:id="@+id/checkBox3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/checkBox2"
        android:layout_below="@+id/checkBox2"
        android:text="乒乓球" />

</RelativeLayout>

2.源代码

package com.example.text2;

import android.os.Bundle;
import android.util.Log;
import android.accounts.Account;
import android.accounts.OnAccountsUpdateListener;
import android.app.Activity;
import android.view.Menu;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends Activity {
    private CheckBox CheckBox1;
    private CheckBox CheckBox2;
    private CheckBox CheckBox3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        CheckBox1 =(CheckBox) findViewById(R.id.checkBox1);
        CheckBox2 =(CheckBox) findViewById(R.id.checkBox2);
        CheckBox3 =(CheckBox) findViewById(R.id.checkBox3);
        
        CheckBox1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            
            @Override
            public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
                // TODO Auto-generated method stub
                if(arg1){
                    String text = CheckBox1.getText().toString();
                    Log.i("tag", text);
                }
            }
        });
        
        CheckBox2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            
            @Override
            public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
                // TODO Auto-generated method stub
                if (arg1) {
                    String text = CheckBox2.getText().toString();
                    Log.i("tag",text);
                }
                
            }
        });
        
        CheckBox3.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            
            @Override
            public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
                // TODO Auto-generated method stub
                if(arg1){
                    String text = CheckBox3.getText().toString();
                    Log.i("tag", text);
                }
            }
        });
    }

    @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;
    }

}

3.点击足球选项之后，logcat的效果

04-18 22:37:19.921: I/tag(1694): 足球