先来张效果图：

layout布局设置：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/transparent" >

    <GridView
        android:id="@+id/gridview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#EDEDED"
        android:cacheColorHint="#00000000"
        android:divider="@android:color/transparent"
        android:fadingEdge="none"
        android:horizontalSpacing="1dp"
        android:listSelector="@android:color/transparent"
        android:numColumns="3"
        android:verticalSpacing="1dp" >
    </GridView>

</RelativeLayout>

Android GridView布局设置