慕課網--checkbox

<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="com.example.test_checkbox.MainActivity" >

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="籃球" />

    <CheckBox
        android:id="@+id/checkBox2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/checkBox1"
        android:layout_below="@+id/checkBox1"
        android:layout_marginTop="21dp"
        android:text="足球" />

    <CheckBox
        android:id="@+id/checkBox3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/checkBox2"
        android:layout_below="@+id/checkBox2"
        android:layout_marginTop="39dp"
        android:checked="true"
        android:text="羽毛球" />

</RelativeLayout>

package com.example.test_checkbox;

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

public class MainActivity extends Activity implements OnCheckedChangeListener{


	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		final CheckBox cb_1;
		final CheckBox cb_2;
		final CheckBox cb_3;
		
		cb_1 = (CheckBox) findViewById(R.id.checkBox1);
		cb_2 = (CheckBox) findViewById(R.id.checkBox2);
		cb_3 = (CheckBox) findViewById(R.id.checkBox3);
		
		cb_1.setOnCheckedChangeListener(this);
		cb_2.setOnCheckedChangeListener(this);
		cb_3.setOnCheckedChangeListener(this);

	}

	@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;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	@Override
	public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
		String mText = buttonView.getText().toString();
		if(isChecked){
			Log.i("log", "已選中"+mText);	
		}else{
			Log.i("log", "已取消選中"+mText);	
		}
		
	}
}