Android GCM get instance id bug

Question

When I try to get InstanceID from the GCM per the doc, Android Studio complains about missing context parameter. The documentation doesn't mention that. How do I resolve this? Do I simply pass context as such:

String iid = InstanceID.getInstance(this).getID();

Answer 1

Yes, as per the InstanceID Javadoc, you must pass a Context to InstanceID.getInstance() - be that your Activity or another context.

Answer 2

Try this

try {
            InstanceID instanceID = InstanceID
                    .getInstance(getApplicationContext());
            token = instanceID.getToken(ApplicationConstants.SENDER_ID,
                    GoogleCloudMessaging.INSTANCE_ID_SCOPE, null);
        } catch (IOException e) {
            e.printStackTrace();
        }