android ScrollView和ListView固定底部

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_above="@+id/llybuttom" >

        <LinearLayout
            android:id="@+id/layout_business_detail"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >
            <com.test.view.MyListView
                android:id="@+id/listView"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:divider="@drawable/list_line"
                android:dividerHeight="1dip" />
        </LinearLayout>
    </ScrollView>

    <LinearLayout
        android:id="@+id/llybuttom"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="@drawable/listviewbottom"
        >

        <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:text="@string/hello" />
    </LinearLayout>

</RelativeLayout>

必须重写ListView

package com.test.view;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;

public class MyListView extends ListView {

	public MyListView(Context paramContext) {
		super(paramContext);
	}

	public MyListView(Context paramContext, AttributeSet paramAttributeSet) {
		super(paramContext, paramAttributeSet);
	}

	public MyListView(Context paramContext, AttributeSet paramAttributeSet,
			int paramInt) {
		super(paramContext, paramAttributeSet, paramInt);
	}
//设置高度可以无限拉升
	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		heightMeasureSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
				MeasureSpec.AT_MOST);
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	}

}