A. Replace api-Key and secret-Key that you have received in step 32 or 33 at line number 51.
B. Replace your user-id by which you want to register your application for PushNotification at line number 34.
C. Replace your user-id by which you want to register your application for PushNotification at line number 19.

A. After registering for PushNotification go to AppHQ console and click on PushNotification and select
  application after selecting User tab.
B. Select desired user from registered User-list and click on Send Message Button.
C. Send appropriate message to user by clicking Send Button.

	function intializeApp42API() {
			App42.initialize('<YOUR API KEY>', '<YOUR SECRET KEY>');
			App42.setLoggedInUser('<Your User Id>');
		}

	public static boolean isPlayServiceAvailable(Activity activity) {
		int resultCode = GooglePlayServicesUtil
				.isGooglePlayServicesAvailable(activity);
		if (resultCode != ConnectionResult.SUCCESS) {
			if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
				GooglePlayServicesUtil.getErrorDialog(resultCode, activity,
						PlayServiceResolutionRequest).show();
			} else {
				Log.i(Tag, "This device is not supported.");
			}
			return false;
		}
		return true;
	}

	public static void getRegistrationId(Context context,
			String googleProjectNo, App42GCMListener callBack) {
		GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(context);
		String regid = App42GCMController.getRegistrationId(context);
		if (regid.isEmpty()) {
			registeronGCM(context, googleProjectNo, gcm, callBack);
		} else
			callBack.onGCMRegistrationId(regid);
	}

		public static void registeronGCM(final Context context,
			final String googleProjectNo, final GoogleCloudMessaging gcm,
			final App42GCMListener callback) {
		final Handler callingThreadHandler = new Handler();
		new Thread() {
			@Override
			public void run() {
				try {
					final String regid = gcm.register(googleProjectNo);
					callingThreadHandler.post(new Runnable() {
						@Override
						public void run() {
							if (callback != null) {
								callback.onGCMRegistrationId(regid);
							}
						}
					});
				} catch (final Exception ex) {
					callingThreadHandler.post(new Runnable() {
						@Override
						public void run() {
							if (callback != null) {
								callback.onError(ex.getMessage());
							}
						}
					});
				}
			}
		}.start();
	}

public static void registerOnApp42(String userName,String deviceToen,final App42GCMListener callBack){
		App42API.buildPushNotificationService().storeDeviceToken(userName, deviceToen, new App42CallBack() {
			@Override
			public void onSuccess(Object arg0) {
				App42Response response=(App42Response) arg0;
				callBack.onRegisterApp42(response.getStrResponse());
			}
			
			@Override
			public void onException(Exception arg0) {
				// TODO Auto-generated method stub
				callBack.onApp42Response(arg0.getMessage());
			}
		});
	}

public static void sendPushToUser(String userName,String message,final App42GCMListener callBack){
		App42API.buildPushNotificationService().sendPushMessageToUser(userName, message, new App42CallBack() {
			
			@Override
			public void onSuccess(Object arg0) {
				// TODO Auto-generated method stub
				App42Response response=(App42Response) arg0;
				callBack.onApp42Response(response.getStrResponse());
			}
			
			@Override
			public void onException(Exception arg0) {
				// TODO Auto-generated method stub
				callBack.onApp42Response(arg0.getMessage());
			}
		});
	}

     notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
				| Intent.FLAG_ACTIVITY_SINGLE_TOP);
		PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
				notificationIntent, 0);
		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
				this).setSmallIcon(R.drawable.ic_stat_gcm)
				.setContentTitle(title)
				.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
				.setContentText(msg).setWhen(when).setNumber(++msgCount)
				.setLights(Color.YELLOW, 1, 2).setAutoCancel(true)
				.setDefaults(Notification.DEFAULT_SOUND)
				.setDefaults(Notification.DEFAULT_VIBRATE);

   <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.VIBRATE" />

  
    <uses-permission android:name="android.permission.WAKE_LOCK" />
	  <!-- Required for Location based Push Notification. -->
	 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!--
     Creates a custom permission so only this app can receive its messages.

     NOTE: the permission *must* be called PACKAGE.permission.C2D_MESSAGE,
           where PACKAGE is the application's package name.
    -->
    <permission
        android:name="com.example.app42sample.permission.C2D_MESSAGE"
        android:protectionLevel="signature" />

    <uses-permission android:name="com.example.app42sample.permission.C2D_MESSAGE" />

    <!-- This app has permission to register and receive data message. -->
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

     <receiver
            android:name="com.shephertz.app42.push.plugin.App42GCMReceiver"
            android:permission="com.google.android.c2dm.permission.SEND" >
            <intent-filter>
                <!-- Receives the actual messages. -->
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <!-- Receives the registration id. -->
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
                <!-- Your package name here -->
                <category android:name="com.example.app42sample" />
            </intent-filter>
        </receiver>

 <service android:name="com.shephertz.app42.push.plugin.App42GCMService" >
        </service>

  <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="onMessageOpen"
            android:value="com.example.app42sample.MainActivity" />