CheckBox的使用(二):获取选择的文本内容

package com.example.androidtest;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Button;
import android.widget.CheckBox;
import android.view.View;
import android.util.Log;

public class MainActivity extends Activity {
	
	CheckBox plain_cb;
	CheckBox serif_cb;
	CheckBox italic_cb;
	CheckBox bold_cb;
	
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		find_and_modify_text_view();
	}	
	
	private void find_and_modify_text_view() 
	{
		plain_cb = (CheckBox)findViewById(R.id.plain_cb);
		serif_cb = (CheckBox)findViewById(R.id.serif_cb);
		italic_cb = (CheckBox)findViewById(R.id.italic_cb);
		bold_cb = (CheckBox)findViewById(R.id.bold_cb);
		Button get_view_button = (Button)findViewById(R.id.get_view_button);
		get_view_button.setOnClickListener(get_view_button_listener);
	}
	
	private Button.OnClickListener get_view_button_listener = new Button.OnClickListener() {
		public void onClick(View v) 
		{
			String r = "";
			if (plain_cb.isChecked()) {
				r = r + "," + plain_cb.getText();
			} 
			if (serif_cb.isChecked()) {
				r = r + "," + serif_cb.getText();
			}
			
			if (italic_cb.isChecked()) {
				r = r + "," + italic_cb.getText();
			}
			
			if (bold_cb.isChecked()) {
				r = r + "," + bold_cb.getText();
			}
			
			setTitle("Checked:" + r);
		}
	};
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    
<CheckBox android:id="@+id/plain_cb"
     android:text="Plain"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
/>
 
<CheckBox android:id="@+id/serif_cb"
     android:text="Serif"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:typeface="serif"
/>
 
<CheckBox android:id="@+id/bold_cb"
     android:text="Bold"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:textStyle="bold"
/>
 
<CheckBox android:id ="@+id/italic_cb"
     android:text="Italic"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:textStyle="italic"
/>


  <Button android:id="@+id/get_view_button" 
      android:layout_width="wrap_content"
    android:layout_height="wrap_content" 
    android:text="Get CheckBox" />
    
</LinearLayout>