Android：Horizo​​ntalScrollView包装其子级？

Question

I have HorizontalScrollView with RelativeLayout as a child. And here is my xml file:

<?xml version="1.0" encoding="utf-8"?>
<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ff00ff"
    android:scrollbars="none">

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffff" >
</RelativeLayout>

 </HorizontalScrollView>

The output is pink color...But I need white...Why Relative Layout didn't filled its parent ?

screenshot:

screenshot with buttons:

Answer 1

As you can see when you put the buttons in you are not matching the scrollview. try using a LinearLayout as your parent then have the scrollview as a child with match_parent and then add in your other layout as a child of the scrollview the match_parent also