RadioGroup ,CheckBox ,Toast

<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<RadioGroup android:id="@+id/radioGroup"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    > 

<RadioButton android:id="@+id/radio1" 
     android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="male"/>

<RadioButton android:id="@+id/radio2" 
     android:layout_width="wrap_content" 
    android:layout_height="wrap_content"
    android:text="female" />

</RadioGroup>

<CheckBox android:id="@+id/apple"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="apple"
    />
    
<CheckBox android:id="@+id/pear"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="pear"
    />

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

package com.demo;

import android.app.Activity;
import android.os.Bundle;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;

public class Activoty1 extends Activity {
	
	private RadioGroup radioGroup = null;
	private RadioButton radio1;
	private RadioButton radio2;
	private CheckBox apple;
	private CheckBox pear;
	private CheckBox banana;
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
        radio1 = (RadioButton) findViewById(R.id.radio1);
        radio2 = (RadioButton) findViewById(R.id.radio2);
        apple = (CheckBox) findViewById(R.id.apple);
        pear = (CheckBox) findViewById(R.id.pear);
        banana = (CheckBox) findViewById(R.id.banana);
        
        //监听
        radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {			
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				if(radio1.getId() == checkedId){
					//弹出显示
					Toast.makeText(Activoty1.this, "male", Toast.LENGTH_SHORT).show();
					System.out.println("male");
				}else if(radio2.getId() == checkedId){
					System.out.println("female");
				}				
			}
		});
        
        apple.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {			
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				// TODO Auto-generated method stub
				if(isChecked){
					System.out.println("apple checked");
				}else{
					System.out.println("apple unchecked");
				}				
			}
		});
        
        pear.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {			
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				// TODO Auto-generated method stub
				if(isChecked){
					System.out.println("pear checked");
				}else{
					System.out.println("pear unchecked");
				}				
			}
		});
        
        
        banana.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {			
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				// TODO Auto-generated method stub
				if(isChecked){
					System.out.println("banana checked");
				}else{
					System.out.println("banana unchecked");
				}				
			}
		});
        
    }
}