VerifyActivity.java

package com.android.project.futsalkuy;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.tasks.TaskExecutors;
import com.google.firebase.FirebaseException;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.PhoneAuthCredential;
import com.google.firebase.auth.PhoneAuthProvider;

import java.util.concurrent.TimeUnit;

public class VerifyActivity extends AppCompatActivity {
    private FirebaseAuth mAuth;
    private String verificationId;
    private ProgressBar progressBar;
    private EditText editText;
    private TextView textView, kirim_ulang;

    int counter;
    int status_kirim_ulang;
    CountDownTimer countDownTimer;
    @SuppressLint("RestrictedApi")

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_verify);
        //
        status_kirim_ulang=0;
        kirim_ulang=findViewById(R.id.tv_resending_VerifyScreen);

        counter=30;
        time();
        //

        mAuth = FirebaseAuth.getInstance();
        progressBar = findViewById(R.id.progressBar_VerifyScreen);
        editText = findViewById(R.id.edt_enterCode_VerifyScreen);
        textView = findViewById(R.id.tv_received_VerifyScreen);

        textView.setText(getIntent().getStringExtra("phonenumber"));

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

        findViewById(R.id.btn_verification_VerifyScreen).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 your code..");
                    editText.requestFocus();
                    return;
                }
                verfyCode(code);
            }
        });
    }

    private void verfyCode(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 signUpActivity = new Intent(VerifyActivity.this, SignUpActivity.class);
                            signUpActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                            startActivity(signUpActivity);
                        } else {
                            Toast.makeText(VerifyActivity.this, task.getException().getMessage(), Toast.LENGTH_LONG).show();
                        }
                    }
                });
    }

    private void sendVerificationCode (String number) {
        progressBar.setVisibility(View.VISIBLE);
        PhoneAuthProvider.getInstance().verifyPhoneNumber(number, 60, 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);
                verfyCode(code);
            }
        }

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

    //
    void time()
    {
        countDownTimer = new CountDownTimer(30000, 1000){
            public void onTick(long millisUntilFinished){
                kirim_ulang.setTextColor(getResources().getColor(R.color.red));
                kirim_ulang.setText("Resending("+String.valueOf(counter)+")");
                if(counter <= 1 )
                {
                    stop_time();
                    status_kirim_ulang=1;
                    kirim_ulang.setTextColor(getResources().getColor(R.color.colorPrimary));
                }
                counter--;
            }
            public  void onFinish(){

            }
        }.start();
    }

    void stop_time()
    {
        countDownTimer.cancel();
        kirim_ulang.setText("Resending");
    }


    @Override
    public void onBackPressed() {
        finish();
        super.onBackPressed();
    }

    @Override
    public boolean onSupportNavigateUp() {
        onBackPressed();
        return super.onSupportNavigateUp();
    }
    //
}