修改SrollView嵌套下的整个layout背景色

有时候想修改整个linearlayout的背景色，发现无论怎么修改都没办法全屏的变化。需要在ScrollView中增加android:fillViewport="true"标签即可。

<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/ScrollView"

android:layout_width="fill_parent"
 android:fillViewport="true"
 android:layout_height="fill_parent" android:scrollbars="vertical">
<LinearLayout
   android:id="@+id/html_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:orientation="vertical"
    android:scrollbarStyle="insideOverlay"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
     >

    <include layout="@layout/c_info_title" />

    <TextView
        android:id="@+id/txt_HtmlTitle"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:text="title"
        android:textSize="@dimen/font_size_larger"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/txt_HtmlSource"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="3dp"
        android:gravity="center"
        android:text="txtsource"
        android:textColor="#666"
        android:textSize="@dimen/font_size_small" />

    <View
        android:layout_width="fill_parent"
        android:layout_height="1dp"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:background="@color/bg_zhaiylay" />

    <LinearLayout
        android:id="@+id/quanwen"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:background="@color/white"
        android:layout_marginTop="20dp"
        android:orientation="horizontal" >
        <TextView
            android:id="@+id/tv_zhaiyao"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
             android:layout_marginLeft="10dp"
             android:layout_marginRight="10dp"
            android:layout_marginBottom="10dp"
            android:layout_marginTop="10dp"
            android:textSize="18sp" />
    </LinearLayout>

    <WebView
        android:id="@+id/txt_HtmlContent"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:background="@color/white"
        android:layout_marginRight="5dp"
        android:layout_marginTop="10dp"
        android:scrollbars="none"
        android:text="txtcontent" />

</LinearLayout>
</ScrollView>