FA GOOGLE LoginWithPhoneAuth-ProfileActivity.java

package com.arslan6015.firebaseauthusingphoneno;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import com.google.firebase.auth.FirebaseAuth;

public class ProfileActivity extends AppCompatActivity {

    FirebaseAuth firebaseAuth;
    Button button;

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

        firebaseAuth = FirebaseAuth.getInstance();
        button = findViewById(R.id.SignOut);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                firebaseAuth.signOut();
                Intent intent = new Intent(ProfileActivity.this,MainActivity.class);
                startActivity(intent);
            }
        });
    }
}