Android app crashes on firebase phone authentication

Question

I am using firebase for phone number authentication.When I used my phone number, it automatically verifies it.But when I use another phone number I get classCastExceptio

Answer 1

In case you don't need a reference to an Activity then replace (Executor) this with the following code:

new Executor() {
    @Override
    public void execute(Runnable command) {}
}