payment error

app/src/main/res/layout/activity_payment.xml

@@ -4,14 +4,22 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="10dp"
     tools:context=".PaymentActivity">
 
+    <include
+        android:id="@+id/appbar"
+        layout="@layout/app_bar"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+
+        />
+
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/rvPayment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toBottomOf="@id/appbar"/>
 
     <com.google.android.material.button.MaterialButton
         android:id="@+id/btnPay"