NotificationExample.java

package com.example.notification;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.*;
import android.widget.*;

public class NotificationExample extends Activity {

	public void onCreate(Bundle b) {
		super.onCreate(b);
		LinearLayout layout = new LinearLayout(this);
		{
			Button button = new Button(this);
			button.setOnClickListener(new View.OnClickListener() {
				public void onClick(View view) {
					showNotification();
				}
			});
			button.setText("Show Notification");
			layout.addView(button);
		}
		setContentView(layout);
	}

	void showNotification() {
		Intent intent = new Intent(this, getClass())
				.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

		PendingIntent pendingIntent = PendingIntent.getActivity(
			this,
			0,
			intent,
			PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_ONE_SHOT);

		Notification notification = new Notification.Builder(this)
				.setContentTitle("Notification Example")
				.setContentText("Notification example content.")
				.setContentIntent(pendingIntent)
				.setSmallIcon(android.R.drawable.sym_def_app_icon)
				.setAutoCancel(true)
				.build();

		((NotificationManager) getSystemService(NOTIFICATION_SERVICE))
			.notify(1, notification);
	}
}