make the scrollview fill whole height

Author: tibbi

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

@@ -2,7 +2,8 @@
 <ScrollView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:fillViewport="true">
 
     <EditText
         android:id="@+id/notes_view"