滚动条不起作用？

Question

<ScrollView
    android:id="@+id/sv_chat"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_above="@+id/layout_bottom"
    android:background="#ffffffff" >

    <LinearLayout
        android:id="@+id/layout_chatrecord"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="bottom"
        android:orientation="vertical" >
    </LinearLayout>
</ScrollView>

If I add android:layout_gravity="bottom" in the LinearLayout , the ScrollView can't work. When I put view in LinearLayout all the time,the view will appear from the bottom up which is I want.While the result is ScrollView can't work,the view put first can't be seen.How to solve it?

Answer 1

Try this..

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ScrollView01" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <LinearLayout 
        android:orientation="vertical" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:scrollbars="vertical"
        android:scrollbarAlwaysDrawVerticalTrack="true">
</LinearLayout>
</ScrollView>