How to redirect a user to a specific activity in Cloud Firestore?

Question

While Registering an account using Firebase auth I stored emails in 2 categories Teacher and Student. I add emails to Firestore 2 different categories Teacher and Student wi

Answer 1

package com.example.myapplicationomostff

import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.annotation.NonNull
import androidx.appcompat.app.AppCompatActivity
import com.google.android.gms.tasks.OnCompleteListener
import com.google.android.gms.tasks.Task
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.firestore.DocumentSnapshot
import com.google.firebase.firestore.FirebaseFirestore
import com.google.firebase.firestore.QueryDocumentSnapshot
import com.google.firebase.firestore.QuerySnapshot
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.activity_registy.*


class MainActivity : AppCompatActivity() {

    var myauth =FirebaseAuth.getInstance()
    var rootRef = FirebaseFirestore.getInstance()
    var usersRef = rootRef.collection("users")






    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        btnlogin.setOnClickListener {
            var email =txtemaillogin.text.toString().trim()
            var password =txtpasslogin.text.toString().trim()
            userlogin(email,password)


            }



        btnregistry.setOnClickListener{


            var intent = Intent(this, chose::class.java)
            startActivity(intent)

        }




        }

    private fun userlogin(email: String, password: String) {
        var query = usersRef.whereEqualTo("email",email)
        query.get().addOnCompleteListener { task ->
            if (task.isSuccessful) {
                for (document in task.getResult()!!) {
                    var email1 = document.getString("email").toString()
                    var password1 = document.getString("password").toString()
                    if(password1 == password
                        && email1 == email
                    ){
                        myauth.signInWithEmailAndPassword(email1, password1).addOnCompleteListener{
                            if(it.isSuccessful){

                                val uid = FirebaseAuth.getInstance().currentUser?.uid
                                if (uid != null) {
                                    usersRef.document(uid).get().addOnCompleteListener { task ->
                                        if (task.isSuccessful) {
                                            val document = task.result
                                            if (document != null) {
                                                if (document.exists()) {
                                                    val type = document.getString("type")
                                                    if (type == "doc") {
                                                        startActivity(Intent(this@MainActivity,docpage::class.java))
                                                    } else if (type == "eng") {
                                                        startActivity(Intent(this@MainActivity, engpage::class.java))
                                                    }else  if (type=="mos"){
                                                        startActivity(Intent(this@MainActivity, chosepage::class.java))


                                                    }
                                                }
                                            }
                                        }
                                    }
                                }



                                Toast.makeText(this,"ok",Toast.LENGTH_LONG).show()
                            }else{
                                Toast.makeText(this,"erorr",Toast.LENGTH_LONG).show()

                            }
                        }
                    }else{
                        Toast.makeText(this,"مش مسجل ف الموقع ",Toast.LENGTH_LONG).show()


}