Firebase, is it possible to place verifyPhoneNumber outside activity without passing activity reference to it?

Question

I'm trying to implement Firebase phone number authentication. Official docs says that I need to call

PhoneAuthProvider.getInstance().verifyPhoneNumber(
    phoneNumber,        // Phone number to verify
    60,                 // Timeout duration
    TimeUnit.SECONDS,   // Unit of timeout
    this,               // Activity (for callback binding)
    mCallbacks);        // OnVerificationStateChangedCallbacks

And pass my activity reference for callback binding.

There is another overloaded method in docs, which accepts TaskExecutors.MAIN_THREAD (the Executor used to call the OnVerificationStateChangedCallbacks callbacks), instead of activity ref.

That's what I needed. In this case

phoneAuthProvider.verifyPhoneNumber(
        phone,
        1,
        TimeUnit.MINUTES,
        TaskExecutors.MAIN_THREAD,
        callbacks,
        resendingToken
);

The code works perfectly. But the problem is: callbacks continue their work in a background infinitely long. I didn't find any methods in the documentation to stop these callbacks.

So, how can I manually remove these callbacks, when I don't need them anymore?

Answer 1

I think you can use TaskExecutors.MAIN_THREAD instead.

PhoneAuthProvider.getInstance().verifyPhoneNumber(
    phoneNumber, // Phone number to verify
    60, // Timeout duration
    TimeUnit.SECONDS, // Unit of timeout
    TaskExecutors.MAIN_THREAD, // Executor
    verifyNumberCallback
)