问安卓系统中GridView inside ScrollView的问题

EN

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/scroll_home"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RelativeLayout 
            android:id="@+id/layout_home" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">       

              <GridView xmlns:android="http://schemas.android.com/apk/res/android"
                android:id="@+id/programacao_grid"
                android:numColumns="auto_fit"
                android:gravity="center"
                android:columnWidth="50dp"
                android:stretchMode="columnWidth"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_below="@+id/calendario_programacao"
             >       
            </GridView> 

    </RelativeLayout>

</ScrollView>