java
|_ com.myapplication.businessapplication
   |_ employeetool
      |_ EmployeeNavigationActivity
   |_ managertool
      |_ ManagerNavigationActivity
|_ MainActivity

package com.example.shoponlinenicheteck

import android.os.Bundle
import android.view.View
import android.widget.Button
import android.widget.EditText
import android.widget.Toast
import androidx.annotation.NonNull
import androidx.appcompat.app.AppCompatActivity
import com.google.android.gms.tasks.OnCompleteListener
import com.google.android.material.textfield.TextInputLayout
import com.google.firebase.auth.AuthResult
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseUser
import com.google.firebase.database.FirebaseDatabase
import org.w3c.dom.Text

class RegisterActivity : AppCompatActivity() {
    var ufirstname: EditText? = null
    var ulastname: EditText? = null
    var uemail: EditText? = null
    var upassword: EditText? = null
    var uconfpassword: EditText? = null
    var ucontactno: EditText? = null
    var btnRegister: Button? = null
    var userFirstNameWrapper: TextInputLayout? = null
    var userLastNameWrapper: TextInputLayout? = null
    var userEmailWrapper: TextInputLayout? = null
    var userPasswordWrapper: TextInputLayout? = null
    var userConfPasswordWrapper: TextInputLayout? = null
    var userContactNoWrapper: TextInputLayout? = null
    private var uAuth: FirebaseAuth? = null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_register)

        val ufirstname = findViewById<View>(R.id.userFirstName)
        val ulastname = findViewById<View>(R.id.userLastName)
        val uemail = findViewById<View>(R.id.userEmailAddress)
        val upassword = findViewById<View>(R.id.userPassword)
        val uconfpassword = findViewById<View>(R.id.userConfPassword)
        val ucontactno = findViewById<View>(R.id.userContactNumber)

        val userFirstNameWrapper = findViewById<TextInputLayout>(R.id.userFirstNameWrapper)
        val userLastNameWrapper = findViewById<TextInputLayout>(R.id.userlastNameWrapper)
        val userEmailWrapper = findViewById<TextInputLayout>(R.id.userEmailWrapper)
        val userPasswordWrapper = findViewById<TextInputLayout>(R.id.userPasswordWrapper)
        val userConfPasswordWrapper = findViewById<TextInputLayout>(R.id.userConfPasswordWrapper)
        val userContactNoWrapper = findViewById<TextInputLayout>(R.id.userContactNoWrapper)

        val btnRegister=findViewById<Button>(R.id.btnRegister)

    }

    init {
        var onClick: Unit


            run {
                if (uAuth!!.currentUser != null) {
                    //User is Logged in and can redirect to another activity.

                    val firstname = ufirstname!!.text.toString().trim { it <= ' ' }
                    val lastname = ulastname!!.text.toString().trim { it <= ' ' }
                    val email = uemail!!.text.toString().trim { it <= ' ' }
                    val password = upassword!!.text.toString().trim { it <= ' ' }
                    val confpassword = uconfpassword!!.text.toString().trim { it <= ' ' }
                    val contactno = ucontactno!!.text.toString().trim { it <= ' ' }
                    if (firstname.isEmpty()) {
                        userFirstNameWrapper!!.error = "Enter First Name"
                        userFirstNameWrapper!!.requestFocus()

                    }
                    if (lastname.isEmpty()) {
                        userLastNameWrapper!!.error = "Enter Last Name"
                        userLastNameWrapper!!.requestFocus()

                    }
                    if (email.isEmpty()) {
                        userEmailWrapper!!.error = "Enter Email"
                        userEmailWrapper!!.requestFocus()

                    }
                    if (password.isEmpty()) {
                        userPasswordWrapper!!.error = "Enter Password"
                        userPasswordWrapper!!.requestFocus()

                    }
                    if (confpassword.isEmpty()) {
                        userConfPasswordWrapper!!.error = "Enter Confirm Password"
                        userConfPasswordWrapper!!.requestFocus()

                    }
                    if (password != confpassword) {
                        userConfPasswordWrapper!!.error = "Password didn't match"
                        userConfPasswordWrapper!!.requestFocus()

                    }
                    if (contactno.isEmpty()) {
                        userContactNoWrapper!!.error = "Enter Contact No"
                        userContactNoWrapper!!.requestFocus()

                    }

                    [COLOR=#8000ff]uAuth=FirebaseAuth.getInstance()[/COLOR]

                    fun () {
                        onStart()
                        super.onStart()
                        //Check if user is signed in (non-null) and update UI accordingly
                        val user = User(firstname, lastname, email, contactno)
                        FirebaseDatabase.getInstance().getReference("Users")
                            .child(FirebaseAuth.getInstance().currentUser!!.uid)

                        var onComplete: Unit

                    }
                    if (AuthResult)
                    uAuth= FirebaseAuth.getInstance()
                    uAuth!!.createUserWithEmailAndPassword(email, password)
                        .addOnCompleteListener(OnCompleteListener { AuthResult})
                    var onComplete: Unit

                    var task: NonNull; Task<AuthResult?>
                    (
                            if (task.isSuccessful()) {
                                val user = User(firstname, lastname, email, contactno)
                                FirebaseDatabase.getInstance().getReference("Users")
                                    .child(FirebaseAuth.getInstance().currentUser!!.uid)
                                    .setValue(user)
                                    .addOnCompleteListener(OnCompleteListener<Unit>())
                                var onComplete: Unit
                                NonNull
                                var task: Task<Void?>
                                (
                                        if (task.IsSuccessful()) Toast.makeText(
                                            this@RegisterActivity,
                                            "User created successfully.",
                                            Toast.LENGTH_LONG.show()
                                        ) else
                                            Toast.makeText(
                                                this@RegisterActivity,
                                                task.getException().getMessage(),
                                                Toast.LENGTH_LONG.show()
                                            )
                                        )
                            } else Toast.makeText(
                                this@RegisterActivity,
                                task.getException().getMessage(),
                                Toast.LENGTH_LONG.show()
                            )
                            )

                }


            }




    }

}