Question

I’m having a problem with GCM on Android. It fails to execute the onRegistered() callback, or ever return a good regId, on one of my test devices (Droid2) – but it works perfectly well on another device (Galaxy Nexus).

I’m following the basic example here. The caller looks like this:

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

final String regId = GCMRegistrar.getRegistrationId(this);

if (regId.equals(""))
    GCMRegistrar.register(this, Constants.SENDER_ID);
else
    Log.v(TAG, "Already registered");

And my manifest has this:

<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />

and

<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.gcl.myapp" />
    </intent-filter>
</receiver>

Why isn’t the onRegistered() callback working? And what could be causing it to work on one device, but fail on another?? Thanks.

Answer 1

If it works on some devices but not others then it is to do with one of the following:

• Pre Android 4.0.4 the device requires a valid google account to work.
• GCM only works on devices with Play Store App and API 8 onwards.
• Your manifest is badly formatted – use Lint to check!
• Device/App is already registered, the Play implementation may not return again.. Try GCMRegistrar.unregister(this); first.

Hope that helps!