Question

I am begginer in Android App and using Java as when I add this code :

GCMRegistrar.checkDevice(this);
        GCMRegistrar.checkManifest(this);
        final String regId = GCMRegistrar.getRegistrationId(this);
        if (regId.equals("")) {
          GCMRegistrar.register(this, SENDER_ID);
        } else {
          Log.v(TAG, "Already registered");
        }

I had error on :
SENDER_ID
Log
TAG

the error “cannot be resolved to available “

Answer 1

As I commented if you’re a beginner you shouldn’t start with GCM, but seems that you’re a beginner not only on Android but also in Java (this is not bad, everybody was a beginner, and I’m not that advanced).

I suggest you to start following some basic tutorials on Java, then start with some basic tutorial for Android and so on.

GCM requires also a server side, so this is going to be quite advanced.

Anyway, the error is simple. SENDER_ID is a field that you haven’t defined anywhere.

You have to declare it somewhere, like:

String SENDER_ID = "mySenderId";

or at the top of your class:

public class MyClass {
    private static final SENDER_ID = "mySenderID";
}