熟悉AndroidAPI系列2——CheckBox和OnCheckedChangeListener

<LinearLayout 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"
    android:orientation="vertical" >

   <CheckBox 
       android:id="@+id/eatId"
       android:layout_width = "wrap_content"
       android:layout_height = "wrap_content"
       android:text = "吃饭"/>
   
   <CheckBox 
       android:id="@+id/sleepId"
       android:layout_width = "wrap_content"
       android:layout_height = "wrap_content"
       android:text = "睡觉"/>
     
   <CheckBox 
       android:id = "@+id/dotaId"
       android:layout_width = "wrap_content"
       android:layout_height = "wrap_content"
       android:text = "dota"/>
   
    <CheckBox 
       android:id = "@+id/allId"
       android:layout_width = "wrap_content"
       android:layout_height = "wrap_content"
       android:text = "全选"/>
</LinearLayout>

package com.njulya.checkbox;

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

public class MainActivity extends Activity {
    private CheckBox eatBox;
    private CheckBox sleepBox;
    private CheckBox dotaBox;
    private CheckBox allBox;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        eatBox = (CheckBox)findViewById(R.id.eatId);
        sleepBox = (CheckBox)findViewById(R.id.sleepId);
        dotaBox = (CheckBox)findViewById(R.id.dotaId);
        allBox = (CheckBox)findViewById(R.id.allId);
        
        AllBoxListener allListener = new AllBoxListener();
        CheckBoxListener boxListener = new CheckBoxListener();
        
        eatBox.setOnCheckedChangeListener(boxListener);
        sleepBox.setOnCheckedChangeListener(boxListener);
        dotaBox.setOnCheckedChangeListener(boxListener);
        allBox.setOnCheckedChangeListener(allListener);
    }
    
    private class AllBoxListener implements OnCheckedChangeListener{
        @Override
        public void onCheckedChanged(CompoundButton arg0, boolean isChecked) {
            if(isChecked){
                eatBox.setChecked(true);
                sleepBox.setChecked(true);
                dotaBox.setChecked(true);
            }else{
                eatBox.setChecked(false);
                sleepBox.setChecked(false);
                dotaBox.setChecked(false);
            }
        }
        
    }
    private class CheckBoxListener implements OnCheckedChangeListener{
        @Override
        public void onCheckedChanged(CompoundButton checkbox, boolean isChecked) {
            if(checkbox.getId() == R.id.eatId){
                System.out.println("eat");
            }
            else if(checkbox.getId() == R.id.sleepId){
                System.out.println("sleep");
            }
            else if(checkbox.getId() == R.id.dotaId){
                System.out.println("dota");
            }
            
            if(isChecked){
                System.out.println("Checked");
            }
            else{
                System.out.println("unChecked");
            }
        }
        
    }
    
    @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;
    }

}