PowenKo > Android > AlertDialog

package com.powenko.Tutorial_UI_AlertDialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Tutorial_UI_AlertDialogActivity extends Activity {
    /** Called when the activity is first created. */
	final Context context = this;
	private Button button;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

		button = (Button) findViewById(R.id.button1);

         // add button listener
    		button.setOnClickListener(new OnClickListener() {
     
    		@Override
    		public void onClick(View arg0) {
     
    			AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
    				context);
     
    			// set title
    			alertDialogBuilder.setTitle("www.powenko.com");
     
    			// set dialog message
    			alertDialogBuilder
    				.setMessage("Close this APP.")
    				.setCancelable(false)
    				.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
    					public void onClick(DialogInterface dialog,int id) {
    						Tutorial_UI_AlertDialogActivity.this.finish();
    					}
    				  })
    				.setNegativeButton("No",new DialogInterface.OnClickListener() {
    					public void onClick(DialogInterface dialog,int id) {
    						dialog.cancel();
    					}
    				});
     
    				// create alert dialog
    				AlertDialog alertDialog = alertDialogBuilder.create();
     
    				// show it
    				alertDialog.show();
    			}
    		});    
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

</LinearLayout>