Push Notification di Android Menggunakan Google Cloud Messaging + PHP

GCMRegistrar.checkDevice(this);
GCMRegistrar.checkManifest(this);

GCMRegistrar.register(MainActivity.this,GCMIntentService.SENDER_ID);

import java.util.Timer;
import java.util.TimerTask;
 
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.util.Log;
 
import com.google.android.gcm.GCMBaseIntentService;
 
public class GCMIntentService extends GCMBaseIntentService {
 
	private static final String TAG = "GCM Tutorial::Service";
 
	// Use your PROJECT ID from Google API into SENDER_ID
	public static final String SENDER_ID = "394127269050";
 
	public GCMIntentService() {
		super(SENDER_ID);
	}
 
	@Override
	protected void onRegistered(Context context, String registrationId) {
 
		Log.i(TAG, "onRegistered: registrationId=" + registrationId);
	}
 
	@Override
	protected void onUnregistered(Context context, String registrationId) {
 
		Log.i(TAG, "onUnregistered: registrationId=" + registrationId);
	}
 
	@Override
	protected void onMessage(Context context, Intent data) {
		String message;
		// Message from PHP server
		message = data.getStringExtra("message");
		// Open a new activity called GCMMessageView
		Intent intent = new Intent(this, GCMMessageView.class);
		// Pass data to the new activity
		intent.putExtra("message", message);
		// Starts the activity on notification click
		PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent,
				PendingIntent.FLAG_UPDATE_CURRENT);
		// Create the notification with a notification builder
		Notification notification = new Notification.Builder(this)
				.setSmallIcon(R.drawable.ic_launcher)
				.setWhen(System.currentTimeMillis())
				.setContentTitle("Title Notifikasi")
				.setContentText(message).setContentIntent(pIntent)
				.getNotification();
		// Remove the notification on click
		notification.flags |= Notification.FLAG_AUTO_CANCEL;
 
		NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		manager.notify(R.string.app_name, notification);
 
		{
			// Wake Android Device when notification received
			PowerManager pm = (PowerManager) context
					.getSystemService(Context.POWER_SERVICE);
			final PowerManager.WakeLock mWakelock = pm.newWakeLock(
					PowerManager.FULL_WAKE_LOCK
							| PowerManager.ACQUIRE_CAUSES_WAKEUP, "GCM_PUSH");
			mWakelock.acquire();
 
			// Timer before putting Android Device to sleep mode.
			Timer timer = new Timer();
			TimerTask task = new TimerTask() {
				public void run() {
					mWakelock.release();
				}
			};
			timer.schedule(task, 5000);
		}
 
	}
 
	@Override
	protected void onError(Context arg0, String errorId) {
 
		Log.e(TAG, "onError: errorId=" + errorId);
	}
}

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
 
public class GCMMessageView extends Activity {
	String message;
	TextView txtmsg;
 
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.messageview);
 
		// Retrive the data from GCMIntentService.java
		Intent i = getIntent();
 
		message = i.getStringExtra("message");
 
		// Locate the TextView
		txtmsg = (TextView) findViewById(R.id.message);
 
		// Set the data into TextView
		txtmsg.setText(message);
	}
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 	 	 xmlns:tools="http://schemas.android.com/tools"
 	 	 android:layout_width="fill_parent"
 	 	 android:layout_height="fill_parent" >
 	 	 <TextView
 	 	 android:id="@+id/msglbl"
 	 	 android:layout_width="wrap_content"
 	 	 android:layout_height="wrap_content"
 	 	 android:text="@string/msglbl" />
 	 	 <TextView
 	 	 android:id="@+id/message"
 	 	 android:layout_width="wrap_content"
 	 	 android:layout_height="wrap_content"
 	 	 android:layout_toRightOf="@+id/msglbl" />
 	 	</RelativeLayout>

<permission android:name="com.alfach.gcmtutorial.permission.C2D_MESSAGE" android:protectionLevel="signature" />
 	 	<uses-permission android:name="com.alfach.gcmtutorial.permission.C2D_MESSAGE" />
 	 	<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
 	 	<uses-permission android:name="android.permission.WAKE_LOCK" />

<activity android:name=".GCMMessageView" >
 	 	 </activity>
 	 	 
 	 	 <service android:name=".GCMIntentService" />
 	 	 
 	 	 <receiver
 	 	 android:name="com.google.android.gcm.GCMBroadcastReceiver"
 	 	 android:permission="com.google.android.c2dm.permission.SEND" >
 	 	 <intent-filter>

$message = $_POST['message'];
 
// Set POST variables
$url = 'https://android.googleapis.com/gcm/send';
 
$fields = array(
                'registration_ids'  => array($_POST['registrationIDs']),
                'data'              => array( "message" => $message ),
                );
 
$headers = array( 
                    'Authorization: key=' . $_POST['apiKey'],
                    'Content-Type: application/json'
                );
 
// Open connection
$ch = curl_init();
 
// Set the url, number of POST vars, POST data
curl_setopt( $ch, CURLOPT_URL, $url );
 
curl_setopt( $ch, CURLOPT_POST, true );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
 
curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );
 
// Execute post
$result = curl_exec($ch);
 
// Close connection
curl_close($ch);
 
echo $result;