diff --git a/MyReactiveForm/MyReactiveForm (starter)/app/build.gradle b/MyReactiveForm/MyReactiveForm (starter)/app/build.gradle
index 415646a..833e57c 100644
--- a/MyReactiveForm/MyReactiveForm (starter)/app/build.gradle	
+++ b/MyReactiveForm/MyReactiveForm (starter)/app/build.gradle	
@@ -1,6 +1,7 @@
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
 
 android {
     compileSdkVersion 30
@@ -29,10 +30,13 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+
+    buildFeatures {
+        viewBinding = true
+    }
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'androidx.core:core-ktx:1.3.2'
diff --git a/MyReactiveForm/MyReactiveForm (starter)/app/src/main/java/com/dicoding/myreactiveform/MainActivity.kt b/MyReactiveForm/MyReactiveForm (starter)/app/src/main/java/com/dicoding/myreactiveform/MainActivity.kt
index 55279e7..f8a9715 100644
--- a/MyReactiveForm/MyReactiveForm (starter)/app/src/main/java/com/dicoding/myreactiveform/MainActivity.kt	
+++ b/MyReactiveForm/MyReactiveForm (starter)/app/src/main/java/com/dicoding/myreactiveform/MainActivity.kt	
@@ -6,7 +6,7 @@ import android.text.TextWatcher
 import android.util.Patterns
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
-import kotlinx.android.synthetic.main.activity_main.*
+import com.dicoding.myreactiveform.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
 
@@ -14,13 +14,16 @@ class MainActivity : AppCompatActivity() {
     private var passwordValid = false
     private var passwordConfirmationValid = false
 
+    lateinit var binding: ActivityMainBinding
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
 
         validateButton()
 
-        ed_email.addTextChangedListener(object : TextWatcher {
+        binding.edEmail.addTextChangedListener(object : TextWatcher {
             override fun afterTextChanged(s: Editable?) {
             }
 
@@ -32,7 +35,7 @@ class MainActivity : AppCompatActivity() {
             }
         })
 
-        ed_password.addTextChangedListener(object : TextWatcher {
+        binding.edPassword.addTextChangedListener(object : TextWatcher {
             override fun afterTextChanged(s: Editable?) {
             }
 
@@ -44,7 +47,7 @@ class MainActivity : AppCompatActivity() {
             }
         })
 
-        ed_confirm_password.addTextChangedListener(object : TextWatcher {
+        binding.edConfirmPassword.addTextChangedListener(object : TextWatcher {
             override fun afterTextChanged(s: Editable?) {
             }
 
@@ -59,7 +62,7 @@ class MainActivity : AppCompatActivity() {
 
     fun validateEmail() {
         // jika password tidak valid tampilkan peringatan
-        val input = ed_email.text.toString()
+        val input = binding.edEmail.text.toString()
         if (!Patterns.EMAIL_ADDRESS.matcher(input).matches()) {
             emailValid = false
             showEmailExistAlert(true)
@@ -72,7 +75,7 @@ class MainActivity : AppCompatActivity() {
 
     fun validatePassword() {
         // jika password < 6 karakter tampilkan peringatan
-        val input = ed_password.text.toString()
+        val input = binding.edPassword.text.toString()
         if (input.length < 6) {
             passwordValid = false
             showPasswordMinimalAlert(true)
@@ -85,8 +88,8 @@ class MainActivity : AppCompatActivity() {
 
     fun validatePasswordConfirmation() {
         // jika konfirmasi password tidak sesuai tampilkan peringatan
-        val input = ed_confirm_password.text.toString()
-        if (input != ed_password.text.toString()) {
+        val input = binding.edConfirmPassword.text.toString()
+        if (input != binding.edPassword.text.toString()) {
             passwordConfirmationValid = false
             showPasswordConfirmationAlert(true)
         } else {
@@ -99,23 +102,23 @@ class MainActivity : AppCompatActivity() {
     private fun validateButton() {
         // jika semua field sudah terisi, enable button submit
         if (emailValid && passwordValid && passwordConfirmationValid) {
-            btn_register.isEnabled = true
-            btn_register.setBackgroundColor(ContextCompat.getColor(this, R.color.teal_200))
+            binding.btnRegister.isEnabled = true
+            binding.btnRegister.setBackgroundColor(ContextCompat.getColor(this, R.color.purple_500))
         } else {
-            btn_register.isEnabled = false
-            btn_register.setBackgroundColor(ContextCompat.getColor(this, android.R.color.darker_gray))
+            binding.btnRegister.isEnabled = false
+            binding.btnRegister.setBackgroundColor(ContextCompat.getColor(this, android.R.color.darker_gray))
         }
     }
 
-    private fun showEmailExistAlert(isValid: Boolean) {
-        ed_email.error = if (isValid) getString(R.string.email_not_valid) else null
+    private fun showEmailExistAlert(isNotValid: Boolean) {
+        binding.edEmail.error = if (isNotValid) getString(R.string.email_not_valid) else null
     }
 
-    private fun showPasswordMinimalAlert(isValid: Boolean) {
-        ed_password.error = if (isValid) getString(R.string.password_not_valid) else null
+    private fun showPasswordMinimalAlert(isNotValid: Boolean) {
+        binding.edPassword.error = if (isNotValid) getString(R.string.password_not_valid) else null
     }
 
-    private fun showPasswordConfirmationAlert(isValid: Boolean) {
-        ed_confirm_password.error = if (isValid) getString(R.string.password_not_same) else null
+    private fun showPasswordConfirmationAlert(isNotValid: Boolean) {
+        binding.edConfirmPassword.error = if (isNotValid) getString(R.string.password_not_same) else null
     }
 }