Upgrade Guide to FCM: Cocos2d-x

As announced by google, the support for GCM will end at 2019/4/11. Therefore in case you are still using GCM, it is recommended to follow the FCM transition procedure described below soon.

Transition procedure

Transition of a Google Cloud Platform project to the Firebase Console

From your Firebase Console create a new project and select your former GCM project:

• Please confirm that your Google Cloud Platform project number and your Cloud Messaging sender ID are Identical. You can find your Project number under Google Cloud Platform > IAM & admin > Settings

  

• The sender ID can be found in your Firebase Console under Settings(icon) > Cloud Messaging:

  

Setup FCM

1. Refer the steps in Register the App to download the google-services.json .

2. Refer the steps in Retrieve Server Key and Register Server Key on Repro to register your Server Key.

Updating of the Repro Cocos2d-x SDK

Perform a SDK update to at least version 3.1.0 of the Repro Cocos2d-x SDK according to Cocos2d-x SDK Upgrade Guide.

Installation of the Firebase SDK

Delete dependencies related to GCM

 dependencies {
-     implementation "com.google.android.gms:play-services-gcm:15.0.1"
 }

Install the Firebase C++ SDK

Refer to the official Firebase documentation and install libfirebase_app.a as well as libfirebase_messaging.a.

Also modify your AndroidManifest.xml as instructed below

Change io.repro.android.GCMReceiver to io.repro.ReproReceiver like this:

 <receiver
-    android:name="io.repro.android.GCMReceiver"
+    android:name="io.repro.android.ReproReceiver"
     android:exported="true"
     android:permission="com.google.android.c2dm.permission.SEND">
     <intent-filter>
         <action android:name="com.google.android.c2dm.intent.RECEIVE" />
         <category android:name="YOUR_PACKAGE_NAME" />
     </intent-filter>
 </receiver>

Registration ID acquisition method related changes

Remove the argument from Repro.enablePushNotification as shown below:

 // AppActivity.java
 package org.cocos2dx.cpp;

 import android.os.Bundle;
 import org.cocos2dx.lib.Cocos2dxActivity;
 import io.repro.android.Repro;

 public class AppActivity extends Cocos2dxActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        Repro.enablePushNotification();
-        Repro.enablePushNotification("SENDER_ID");
     }
 }

Then in your class that implements the firebase::messaging::Listener interface, the OnTokenReceived method should call ReproCpp::setPushRegistrationID.

#include "ReproCpp.h"

...

class MyFirebaseMessagingListener : public firebase::messaging::Listener {
...
public:
    void OnTokenReceived(const char* token) override {
        ReproCpp::setPushRegistrationID(token);
    }

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