Implementing Google Sign In using firebase
- Add this dependency to build.gradle.kts.
implementation("com.google.android.gms:play-services-auth:20.7.0")
LoginActivity
package com.rrmchathura.realestate
import android.app.Activity
import android.app.ProgressDialog
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import androidx.activity.result.contract.ActivityResultContracts
import com.google.android.gms.auth.api.signin.GoogleSignIn
import com.google.android.gms.auth.api.signin.GoogleSignInClient
import com.google.android.gms.auth.api.signin.GoogleSignInOptions
import com.google.android.gms.common.api.ApiException
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.GoogleAuthProvider
import com.google.firebase.database.FirebaseDatabase
import com.rrmchathura.realestate.databinding.ActivityLoginOptionsBinding
class LoginOptionsActivity : AppCompatActivity() {
private lateinit var binding : ActivityLoginOptionsBinding
private val TAG = "LOGIN_OPTIONS_TAG"
private lateinit var progressDialog:ProgressDialog
private lateinit var firebaseAuth:FirebaseAuth
private lateinit var mGoogleSignInClient:GoogleSignInClient
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityLoginOptionsBinding.inflate(layoutInflater)
setContentView(binding.root)
progressDialog = ProgressDialog(this)
progressDialog.setTitle("Please wait")
progressDialog.setCanceledOnTouchOutside(true)
firebaseAuth = FirebaseAuth.getInstance()
val gso = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build()
mGoogleSignInClient = GoogleSignIn.getClient(this,gso)
binding.skipBtn.setOnClickListener {
finish()
}
binding.loginGooglelBtn.setOnClickListener {
beginLoginBtn()
}
}
private fun beginLoginBtn(){
Log.d(TAG,"beginLoginBtn: ")
val googleSignInIntent = mGoogleSignInClient.signInIntent
googleSignInActivityResultLauncher.launch(googleSignInIntent)
}
private val googleSignInActivityResultLauncher = registerForActivityResult(
ActivityResultContracts.StartActivityForResult()
){result ->
if (result.resultCode == Activity.RESULT_OK){
val data = result.data
val task = GoogleSignIn.getSignedInAccountFromIntent(data)
try {
val account = task.getResult(ApiException::class.java)
Log.d(TAG,"googleSignInActivityResultLauncher: AccountId: $account.id")
firebaseAuthWithGoogleAccount(account.idToken)
}catch (e : Exception){
Log.e(TAG,"googleSignInActivityResultLauncher: ",e)
}
}else{
Log.d(TAG,"googleSignInActivityResultLauncher: Cancelled...!")
MyUtils.toast(this,"Cancelled..!")
}
}
private fun firebaseAuthWithGoogleAccount(idToken:String?){
Log.d(TAG,"firebaseAuthWithGoogleAccount: IdToken: $idToken")
val creadential = GoogleAuthProvider.getCredential(idToken,null)
firebaseAuth.signInWithCredential(creadential)
.addOnSuccessListener { authResult ->
if (authResult.additionalUserInfo!!.isNewUser){
Log.d(TAG,"firebaseAuthWithGoogleAccount: Account Created......!")
updateUserInfoDb()
}
else{
startActivity(Intent(this,MainActivity::class.java))
finishAffinity()
}
}
.addOnFailureListener { e ->
Log.e(TAG,"firebaseAuthWithGoogleAccount: ",e)
MyUtils.toast(this,"Failed signin due to ${e.message}")
}
}
private fun updateUserInfoDb(){
Log.d(TAG,"updateUserInfoDb")
progressDialog.setMessage("Saving User Info..")
progressDialog.show()
val timestamp = MyUtils.timestamp()
val registeredUserUid = "${firebaseAuth.uid}"
val registeredUserEmail = "${firebaseAuth.currentUser!!.email}"
val name = "${firebaseAuth.currentUser!!.displayName}"
val hashMap = HashMap()
hashMap["uid"] = registeredUserUid
hashMap["email"] = registeredUserEmail
hashMap["name"] = name
hashMap["timestamp"] = timestamp
hashMap["phoneCode"] = ""
hashMap["phoneNumber"] = ""
hashMap["profileImageUrl"] = ""
hashMap["dob"] = ""
hashMap["userType"] = MyUtils.USER_TYPE_GOOGLE
hashMap["token"] = ""
val ref = FirebaseDatabase.getInstance().getReference("Users")
ref.child(registeredUserUid).setValue(hashMap).addOnSuccessListener {
Log.d(TAG,"updateUserInfoDb: AUser Info Saved ......!")
progressDialog.dismiss()
startActivity(Intent(this,MainActivity::class.java))
finishAffinity()
}
.addOnFailureListener {e ->
Log.e(TAG,"updateUserInfoDb: ",e)
progressDialog.dismiss()
MyUtils.toast(this,"Failed to save due to ${e.message}")
}
}
}
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