working Login system with firbase

.gitignore

@@ -13,3 +13,4 @@
 .externalNativeBuild
 .cxx
 local.properties
+app/google-services.json

app/build.gradle

@@ -1,6 +1,8 @@
 plugins {
     id 'com.android.application'
     id 'kotlin-android'
+    id 'kotlin-android-extensions'
+    id 'com.google.gms.google-services'
 }
 
 android {
@@ -39,6 +41,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'com.google.firebase:firebase-auth:20.0.1'
     testImplementation 'junit:junit:4.+'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

app/google-services.json

@@ -0,0 +1,40 @@
+{
+  "project_info": {
+    "project_number": "446879286455",
+    "firebase_url": "https://mob-mobile.firebaseio.com",
+    "project_id": "mob-mobile",
+    "storage_bucket": "mob-mobile.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:446879286455:android:eee66dd136dc40f6eb7932",
+        "android_client_info": {
+          "package_name": "tk.shyamkumaryadav.mob"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "446879286455-72k1t9b5n6cehkjq817hju5sg95j6o3v.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyCk8rdwdx_DM0mDyeUy42PfQ9JIhqmx3f4"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "446879286455-72k1t9b5n6cehkjq817hju5sg95j6o3v.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

app/src/main/AndroidManifest.xml

@@ -2,13 +2,19 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="tk.shyamkumaryadav.mob">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Mob">
+        <activity android:name=".ForgetPasswor"></activity>
+        <activity android:name=".SignUpActivity" />
+        <activity android:name=".MobActivity" />
+        <activity android:name=".LoginActivity" />
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/tk/shyamkumaryadav/mob/ForgetPasswor.kt

@@ -0,0 +1,11 @@
+package tk.shyamkumaryadav.mob
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class ForgetPasswor : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_forget_passwor)
+    }
+}

app/src/main/java/tk/shyamkumaryadav/mob/LoginActivity.kt

@@ -0,0 +1,56 @@
+package tk.shyamkumaryadav.mob
+
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import android.util.Patterns
+import android.view.View
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.google.firebase.auth.FirebaseAuth
+import kotlinx.android.synthetic.main.activity_login.*
+import kotlin.math.log
+
+
+class LoginActivity : AppCompatActivity() {
+
+    lateinit var fireAuth: FirebaseAuth
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_login)
+        fireAuth = FirebaseAuth.getInstance()
+    }
+
+    fun btnLogin(view: View) {
+        textFieldEmail.error = null
+        val email = tfEmail.text.toString()
+        val password = tfPassword.text.toString()
+        when {
+            email.isEmpty() -> {
+                textFieldEmail.error = "Required"
+            }
+            ! Patterns.EMAIL_ADDRESS.matcher(email).matches() -> {
+                textFieldEmail.error = "Not Valid Email !"
+            }
+            !(email.isEmpty() || password.isEmpty()) -> {
+                fireAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(this) {
+                    if (it.isSuccessful){
+                        val intent = Intent(this, MobActivity::class.java)
+                        startActivity(intent)
+                        finish()
+                    }else{
+                        Toast.makeText(this, "Pleas enter email and password vaild", Toast.LENGTH_LONG).show()
+                    }
+                }
+            }else -> {
+                Toast.makeText(this, "password required", Toast.LENGTH_LONG).show()
+            }
+        }
+    }
+
+    override fun onStart() {
+        super.onStart()
+        var currentUser = fireAuth.currentUser
+
+    }
+}

app/src/main/java/tk/shyamkumaryadav/mob/MainActivity.kt

@@ -1,11 +1,37 @@
 package tk.shyamkumaryadav.mob
 
+import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
+import com.google.firebase.auth.FirebaseAuth
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+        val fireAuth = FirebaseAuth.getInstance()
+        if (fireAuth.currentUser != null){
+            updateUI("IS_LOGIN")
+        }
+    }
+
+    fun btnGetLogin(view: View) {
+        updateUI("LOGIN")
+    }
+
+    fun btnGetSignUp(view: View) {
+        updateUI("SIGN_UP")
+    }
+
+    private fun updateUI(name:String){
+        val intent = when(name){
+            "LOGIN" -> Intent(this, LoginActivity::class.java)
+            "SIGN_UP" -> Intent(this, SignUpActivity::class.java)
+            "IS_LOGIN" -> Intent(this, MobActivity::class.java)
+            else -> throw Exception("404 Error")
+        }
+        startActivity(intent)
+        finish()
     }
 }

app/src/main/java/tk/shyamkumaryadav/mob/MobActivity.kt

@@ -0,0 +1,27 @@
+package tk.shyamkumaryadav.mob
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.view.View
+import android.widget.Toast
+import com.google.firebase.auth.FirebaseAuth
+import kotlinx.android.synthetic.main.activity_mob.*
+
+class MobActivity : AppCompatActivity() {
+    lateinit var fireAuth: FirebaseAuth
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_mob)
+        val fireAuth = FirebaseAuth.getInstance()
+        textUserEmail.text = fireAuth.currentUser?.email ?: "NO User Email"
+    }
+
+    fun btnLogout(view: View) {
+        // logout and redirect to LoginActivity
+        FirebaseAuth.getInstance().signOut()
+        var intent = Intent(this, LoginActivity::class.java)
+        startActivity(intent)
+        finish()
+    }
+}

app/src/main/java/tk/shyamkumaryadav/mob/SignUpActivity.kt

@@ -0,0 +1,14 @@
+package tk.shyamkumaryadav.mob
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.view.View
+
+class SignUpActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_sign_up)
+    }
+
+    fun btnSignUp(view: View) {}
+}

app/src/main/res/drawable/ic_baseline_email_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M20,4L4,4c-1.1,0 -1.99,0.9 -1.99,2L2,18c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,6c0,-1.1 -0.9,-2 -2,-2zM20,8l-8,5 -8,-5L4,6l8,5 8,-5v2z"/>
+</vector>

app/src/main/res/drawable/ic_baseline_lock_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M18,8h-1L17,6c0,-2.76 -2.24,-5 -5,-5S7,3.24 7,6v2L6,8c-1.1,0 -2,0.9 -2,2v10c0,1.1 0.9,2 2,2h12c1.1,0 2,-0.9 2,-2L20,10c0,-1.1 -0.9,-2 -2,-2zM12,17c-1.1,0 -2,-0.9 -2,-2s0.9,-2 2,-2 2,0.9 2,2 -0.9,2 -2,2zM15.1,8L8.9,8L8.9,6c0,-1.71 1.39,-3.1 3.1,-3.1 1.71,0 3.1,1.39 3.1,3.1v2z"/>
+</vector>