Question

I have some server side code with which I am trying to create a push notification. And the result looks like this:

{"multicast_id":8714083978034301091,"success":1,"failure":0,"canonical_ids":0,"r‌​esults":[{"message_id":"0:1350807053347963%9aab4bd8f9fd7ecd"}]}

and here is the PHP code I used to send that push notification. By the way the push didn’t happen so I am trying to figure out why:

$url = 'https://android.googleapis.com/gcm/send';

$device_ids = array( $device_id );

$t_data = array();
$t_data['message'] = 'Someone commented on your business.';

$t_json = array( 'registration_ids' => $device_ids , 'data' => $t_data );

// Open connection
$ch = curl_init();

curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Authorization: key=my_key', 'Content-Type: application/json' ) );
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode( $t_json ) );

curl_setopt($ch, CURLOPT_URL, $url);

// Execute post
$result = curl_exec($ch);    

if ($result === FALSE)
{   
   die('Curl failed: ' . curl_error($ch));
}

// Close connection
curl_close($ch);

Here is the part of the manifest which deals with Google cloud messaging:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.problemio"
    android:versionCode="82"
    android:versionName="2.2.82" >

    <supports-screens  android:largeScreens="true"   android:normalScreens="true"  android:smallScreens="true"/> 

    <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16"/>
    <!-- <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="xx"/>  -->

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

    <!-- Required permission to use in-app billing. -->
    <uses-permission android:name="com.android.vending.BILLING" />



    <permission android:name="com.problemio.permission.C2D_MESSAGE" 
        android:protectionLevel="signature" />
    <uses-permission android:name="com.problemio.permission.C2D_MESSAGE" />


    <!-- App receives GCM messages. -->
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /> 
    <!-- GCM requires a Google account. -->
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <!-- Keeps the processor from sleeping when a message is received. -->
    <uses-permission android:name="android.permission.WAKE_LOCK" /> 







    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" 
        android:theme="@style/CustomTheme" 
        android:name="MyApplication"
        android:debuggable="true"
                >

        <!--  For Google Cloud Messaging -->
        <receiver android:name="com.google.android.gcm.GCMBroadcastReceiver" android:permission="com.google.android.c2dm.permission.SEND" >
          <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
                <category android:name="com.problemio" />
          </intent-filter>
        </receiver>   

        <service android:name=".GCMIntentService" />
        <!--  End of Google Cloud Messaging -->

EDIT:

Here is my whole GCMIntentService class:

package com.problemio;

import static com.google.android.gcm.GCMConstants.ERROR_SERVICE_NOT_AVAILABLE;
import static com.google.android.gcm.GCMConstants.EXTRA_ERROR;
import static com.google.android.gcm.GCMConstants.EXTRA_REGISTRATION_ID;
import static com.google.android.gcm.GCMConstants.EXTRA_SPECIAL_MESSAGE;
import static com.google.android.gcm.GCMConstants.EXTRA_TOTAL_DELETED;
import static com.google.android.gcm.GCMConstants.EXTRA_UNREGISTERED;
import static com.google.android.gcm.GCMConstants.INTENT_FROM_GCM_LIBRARY_RETRY;
import static com.google.android.gcm.GCMConstants.INTENT_FROM_GCM_MESSAGE;
import static com.google.android.gcm.GCMConstants.INTENT_FROM_GCM_REGISTRATION_CALLBACK;
import static com.google.android.gcm.GCMConstants.VALUE_DELETED_MESSAGES;

import java.util.Random;
import java.util.concurrent.TimeUnit;

import com.google.android.gcm.GCMBaseIntentService;

import android.app.AlarmManager;
import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.PowerManager;
import android.os.SystemClock;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.Toast;

import utils.GCMConstants;

public class GCMIntentService extends GCMBaseIntentService 
{

public GCMIntentService() 
{
        super(ProblemioActivity.SENDER_ID);
}

@Override
  protected void onRegistered(Context ctxt, String regId) {
    Log.d(getClass().getSimpleName(), "onRegistered: " + regId);
    Toast.makeText(this, regId, Toast.LENGTH_LONG).show();
  }

  @Override
  protected void onUnregistered(Context ctxt, String regId) {
    Log.d(getClass().getSimpleName(), "onUnregistered: " + regId);
  }

  @Override
  protected void onMessage(Context ctxt, Intent message) {
    Bundle extras=message.getExtras();

    for (String key : extras.keySet()) {
      Log.d(getClass().getSimpleName(),
            String.format("onMessage: %s=%s", key,
                          extras.getString(key)));
    }
  }

  @Override
  protected void onError(Context ctxt, String errorMsg) {
    Log.d(getClass().getSimpleName(), "onError: " + errorMsg);
  }

  @Override
  protected boolean onRecoverableError(Context ctxt, String errorMsg) {
    Log.d(getClass().getSimpleName(), "onRecoverableError: " + errorMsg);

    return(true);
  } 

  private static void generateNotification(Context context, String message, String title ) 
  {
        int icon = R.drawable.ic_launcher;
        long when = System.currentTimeMillis(); // can change this to a future time if desired

        NotificationManager notificationManager = 
                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

        Intent notificationIntent = new Intent(context, ProblemioActivity.class);

        // set intent so it does not start a new activity
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0);        
        Uri defaultSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);            

         Notification notification = new NotificationCompat.Builder(context)
         .setContentTitle(title)
         .setContentText(message)
         .setContentIntent(intent)
         .setSmallIcon(icon)
         .setLights(Color.YELLOW, 1, 2)
         .setAutoCancel(true)
         .setSound(defaultSound)
         .build();

        notificationManager.notify(0, notification);
}     

}

But not matter what I try the push notification does not appear on the physical device. Any ideas why not and how I can make it appear on the device?

Answer 1

You only need to add to onMessage() the call to the notification function, like this:

@Override
protected void onMessage(Context ctxt, Intent message) {
    Bundle extras=message.getExtras();

    for (String key : extras.keySet()) {
      Log.d(getClass().getSimpleName(),
            String.format("onMessage: %s=%s", key,
                      extras.getString(key)));
    }
    generateNotification(ctxt, extras.getString("message"), "test title");

}