为什么我打电话给.setOnClickListener

Question

当我第一次按下signUpBinding.finishSignUp.setOnClickListener（）时，它不会导航到仪表板片段，但是当我第二次尝试输入有效的用户名时，它将立即执行导航，从而跳过电子邮件和其他验证的其余部分。密码。

@Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        navController = Navigation.findNavController(view);
        signUpBinding.setAuthViewModelBinder(authViewModel);

        signUpBinding.finishSignUp.setOnClickListener(v -> {
            username=signUpBinding.username.getText().toString();
            email=signUpBinding.username.getText().toString();
            password=signUpBinding.username.getText().toString();
            phonenumber=signUpBinding.username.getText().toString();

            if(username.length()<5)
            {
                Toast.makeText(getActivity(), "Username need to be longer", Toast.LENGTH_SHORT).show();
                return;

            }
            if(email.length()<5)
            {
                Toast.makeText(getActivity(),"Email need to be longer",Toast.LENGTH_LONG).show();
                return;
//
            }
            if(password.length()<5)
            {
                Toast.makeText(getActivity(), "Password need to be longer", Toast.LENGTH_SHORT).show();
                return;
            }

                User user=new User();
                user.setEmail(email);
                user.setPassword(password);
                user.setUsername(username);
                user.setPhone(phonenumber);
                authViewModel.CreateUserWithEmailAndPassword(user).observe(getViewLifecycleOwner(), s -> {
                    Toast.makeText(getActivity(), s, Toast.LENGTH_SHORT).show();
                    navController.navigate(SignUpFragmentDirections.actionSignUpFragmentToDashboardFragment());
                });








        });


    }