用代码适配Gridview使得高度既不出现滚动条也不出现空白区

如图，是美工给的界面图，在实现中，中间的九宫格用gridview来实现。但在不同的dpi下，gridview要么显示不全需要滚动浏览，要么留出空白区域。

界面的布局文件代码：

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

<cn.llzg.plotwiki.ui.stub.HeaderBar
android:id="@+id/headerbar"
android:layout_width="match_parent"
android:layout_height="wrap_content" >

</cn.llzg.plotwiki.ui.stub.HeaderBar>

<ImageView
android:id="@+id/neck_img"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.3"
android:scaleType="fitXY"
android:src="@drawable/neck_img" />

<GridView
android:id="@+id/gridv_business_home"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@color/gray"
android:horizontalSpacing="1px"
android:verticalSpacing="1px"
android:numColumns="3"
>
</GridView>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.13"
android:gravity="center"
android:orientation="vertical" >

<TextView
android:id="@+id/tv_add_business"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/selector_grey"
android:gravity="center"
android:padding="6dp"
android:text="@string/add_business"
android:textSize="@dimen/large_size" />

</LinearLayout>

</LinearLayout>为了使得gridview正好显示3行，需要在定义适配器的getView()方法中用代码计算其高度，解决方法如下：
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = LayoutInflater.from(BusinessActivity_3.this).inflate(
R.layout.item_grid_business, null);
ImageView img = (ImageView) view
.findViewById(R.id.img_business_icon);
TextView iv = (TextView) view
.findViewById(R.id.tv_business_caption);
img.setImageResource(itemPicIds[position]);
iv.setText(itemStrs[position]);
<span style="color:#ff6666;">int height=gridview.getHeight()/3;
AbsListView.LayoutParams params=new AbsListView.LayoutParams(LayoutParams.MATCH_PARENT, height);
view.setLayoutParams(params);</span>
return view;
}