كيفية تعيين زر اعادة ارسال رمز OTP من firebase

السلام عليكم ورحمة الله وبركاته

استخدم خاصية OTP من firebase لتحقق من ارقام المشتركين في تطبيقي وقد واجهتني مشكلة في حالة المستخدم تاخر فس ادخال رمز OTP قمت باضافة زر للقيام باعادة ارسال الرمز للمستخدم ولكن لم اعلم كيف يمكنني كتابة كود الاستعاده

انا استخدم هذا الكود الان كامل

public class VerifyPhoneActivity extends AppCompatActivity {


    private String verificationId;
    private FirebaseAuth mAuth;
    private ProgressBar progressBar;
    private EditText editText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_verify_phone);

        mAuth = FirebaseAuth.getInstance();

        progressBar = findViewById(R.id.progressbar);
        editText = findViewById(R.id.editTextCode);
        findViewById(R.id.tt).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

//=======here I want add it==============///////////

            }
        });

        String phonenumber = getIntent().getStringExtra("phonenumber");
        sendVerificationCode(phonenumber);

        findViewById(R.id.buttonSignIn).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String code = editText.getText().toString().trim();

                if (code.isEmpty() || code.length() < 6) {

                    editText.setError("Enter code...");
                    editText.requestFocus();
                    return;
                }
                verifyCode(code);
            }
        });

    }

    private void verifyCode(String code) {
        PhoneAuthCredential credential = PhoneAuthProvider.getCredential(verificationId, code);
        signInWithCredential(credential);
    }

    private void signInWithCredential(PhoneAuthCredential credential) {
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {

                            Intent intent = new Intent(VerifyPhoneActivity.this, ProfileActivitytt.class);
                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);

                            startActivity(intent);

                        } else {
                            Toast.makeText(VerifyPhoneActivity.this, task.getException().getMessage(), Toast.LENGTH_LONG).show();
                        }
                    }
                });
    }

    private void sendVerificationCode(String number) {
        progressBar.setVisibility(View.VISIBLE);
        PhoneAuthProvider.getInstance().verifyPhoneNumber(
                number,
                20,
                TimeUnit.SECONDS,
                TaskExecutors.MAIN_THREAD,
                mCallBack
        );

    }

    private PhoneAuthProvider.OnVerificationStateChangedCallbacks
            mCallBack = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {

        @Override
        public void onCodeSent(String s, PhoneAuthProvider.ForceResendingToken forceResendingToken) {
            super.onCodeSent(s, forceResendingToken);
            verificationId = s;
        }

        @Override
        public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
            String code = phoneAuthCredential.getSmsCode();
            if (code != null) {
                editText.setText(code);
                verifyCode(code);
            }
        }

        @Override
        public void onVerificationFailed(FirebaseException e) {
            Toast.makeText(VerifyPhoneActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
        }
    };


}