纠结很久的在底部显示一个加载进度的view，gridview则做不到

http://www.iteye.com/problems/77063  
和上面的问题   但没有解决掉 看我布局文件如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@drawable/bg_index"
  android:orientation="vertical">
  <RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <GridView
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/gridview"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="@drawable/home_backdrops"
      android:columnWidth="90dp"
      android:gravity="center"
      android:horizontalSpacing="10dp"
      android:listSelector="@android:color/transparent"
      android:numColumns="2"
      android:stretchMode="columnWidth"
      android:verticalSpacing="10dp" />
    <!-- <include android:id="@+id/in1" layout="@layout/more" android:layout_marginTop="137dp"></include> -->
    <RelativeLayout
      android:layout_width="fill_parent"
      android:layout_height="40dip"
      android:id="@+id/res"
      android:layout_alignParentBottom="true"
      android:layout_alignParentLeft="true">
      <TextView
        android:text="正在加载......."
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:id="@+id/textpbr"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"></TextView>    </RelativeLayout>
    <ProgressBar
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      style="?android:attr/progressBarStyleLarge"
      android:id="@+id/progressBars"
      android:layout_alignParentBottom="true"
      android:layout_centerHorizontal="true"
      android:layout_marginBottom="21dp"></ProgressBar>  </RelativeLayout></LinearLayout>