#14917: Hide example JNI functions with callback

res/layout/test_layout.xml

@@ -90,7 +90,8 @@ as that of the covered work.
         android:id="@+id/callVoid_text"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_below="@+id/callButtonLayout"
+        android:layout_below="@+id/textTo"
+        android:visibility="invisible"
         android:text="callVoidText" />
     
     <Button
@@ -98,6 +99,7 @@ as that of the covered work.
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_below="@+id/callVoid_text"
+        android:visibility="invisible"
         android:onClick="onClick"
         android:text="CallVoid" />
 
@@ -107,6 +109,7 @@ as that of the covered work.
         android:layout_height="wrap_content"
         android:layout_below="@+id/buttonCallVoid"
         android:layout_centerHorizontal="true"
+        android:visibility="invisible"
         android:text="getNewDataText" />
     
     <Button
@@ -114,6 +117,7 @@ as that of the covered work.
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_below="@+id/NewData_text"
+        android:visibility="invisible"
         android:onClick="onClick"
         android:text="GetNewData" />
 
@@ -123,6 +127,7 @@ as that of the covered work.
         android:layout_height="wrap_content"
         android:layout_below="@+id/buttonGetNewData"
         android:layout_centerHorizontal="true"
+        android:visibility="invisible"
         android:text="callbackString" />
   
     <Button
@@ -130,6 +135,7 @@ as that of the covered work.
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_below="@+id/DataString_text"
+        android:visibility="invisible"
         android:onClick="onClick"
         android:text="GetDataString" />