Scroll view and onClick

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

@@ -8,7 +8,9 @@
     android:layout_height="match_parent"
     android:fitsSystemWindows="true"
     tools:context=".MainActivity">
-
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
     <androidx.constraintlayout.widget.ConstraintLayout
     android:id="@+id/mainContent"
     android:layout_width="match_parent"
@@ -176,6 +178,7 @@
                     android:layout_marginStart="150dp"
                     android:background="@drawable/rounded_black_button"
                     android:gravity="center"
+                    android:onClick="addPhoneNumber"
                     android:padding="10dp"
                     android:text="+"
                     android:textColor="#FFFFFF"
@@ -204,4 +207,5 @@
             app:layout_constraintTop_toBottomOf="@+id/phonesLayout" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>
+</ScrollView>
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file

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

@@ -47,6 +47,7 @@
         android:background="@drawable/rounded_red_button"
         android:drawableTop="@android:drawable/ic_menu_delete"
         android:gravity="center"
+        android:onClick="removePhoneNumber"
         android:padding="10dp"
         android:text=""
         android:textColor="#FFFFFF"