notification.java

[source code] Android Development Tutorial - 61 & 62 Notifications
/* API23 WARNING
 * This activity was created with API21 when ActioinBarActivity was not depreciated.
 * IF you are using API23 or later then you will need to extend AppCompatActivity 
*/


package your.package.name
****** activity_main.xml

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Click for Notification"
        android:id="@+id/buckysButton"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:onClick="buckysButtonClicked" />
</RelativeLayout>

***** MainActivity.java

package com.thenewboston.notification;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends ActionBarActivity {

    NotificationCompat.Builder notification;
    private static final int uniqueID = 45612;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        notification = new NotificationCompat.Builder(this);
        notification.setAutoCancel(true);
    }

    public void buckysButtonClicked(View view){
        //Build the notification
        notification.setSmallIcon(R.drawable.ic_launcher);
        notification.setTicker("This is the ticker");
        notification.setWhen(System.currentTimeMillis());
        notification.setContentTitle("Here is the title");
        notification.setContentText("I am the body text of your notification");

        Intent intent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        notification.setContentIntent(pendingIntent);

        //Builds notification and issues it
        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        nm.notify(uniqueID, notification.build());

    }

}