Checkbox - Android Widgets Example

package com.myapp;

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

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        final AlertDialog.Builder adb = new AlertDialog.Builder(this);
        
        // checkBox1
        final CheckBox chkBox1 = (CheckBox)findViewById(R.id.checkBox1);
        
        final Button btn1 = (Button)findViewById(R.id.button1); 
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                AlertDialog ad = adb.create();
                if(chkBox1.isChecked() == true)
                {
                	ad.setMessage("Current is Checked");
                    ad.show();
                }
                else
                {
                 	ad.setMessage("Current is Un Checked");
                    ad.show();
                }
   
            }
        });
             
    }
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}