引用：http://bywuyu.blog.163.com/blog/static/1687376682010101064641190/
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scrollbars="vertical"
android:fadingEdge="vertical"
>
<LinearLayout android:id="@+id/hottopics"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:padding="10dip"
android:scrollbars="vertical"
></LinearLayout>
</ScrollView>
