diff --git a/AndroidTriviaFragment/app/src/main/java/com/example/android/navigation/MainActivity.kt b/AndroidTriviaFragment/app/src/main/java/com/example/android/navigation/MainActivity.kt
index cb72400..69e61fe 100755
--- a/AndroidTriviaFragment/app/src/main/java/com/example/android/navigation/MainActivity.kt
+++ b/AndroidTriviaFragment/app/src/main/java/com/example/android/navigation/MainActivity.kt
@@ -19,6 +19,8 @@ package com.example.android.navigation
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.databinding.DataBindingUtil
+import androidx.navigation.findNavController
+import androidx.navigation.ui.NavigationUI
 import com.example.android.navigation.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
@@ -26,8 +28,17 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         @Suppress("UNUSED_VARIABLE")
         val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
+
+        val navController = this.findNavController(R.id.myNavHostFragment)
+        NavigationUI.setupActionBarWithNavController(this, navController)
     }
 
+    override fun onSupportNavigateUp(): Boolean {
+        val navController = this.findNavController(R.id.myNavHostFragment)
+        return navController.navigateUp()
+    }
+
+
     // TODO (01) Create the new TitleFragment
     // Select File->New->Fragment->Fragment (Blank)