grid

manifest in activity > android:configChanges="orientation"

land - main.xml  (dir res > layout-land > main.xml )

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/MyGrid"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#ffffff"
    android:columnWidth="90dp"
    android:gravity="center"
    android:horizontalSpacing="3dp"
    android:numColumns="4"
    android:stretchMode="columnWidth" >

</GridView>

port main.xml (dir res > layout > main.xml )

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/MyGrid"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#ffffff"
    android:columnWidth="90dp"
    android:gravity="center"
    android:horizontalSpacing="3dp"
    android:numColumns="3"
    android:stretchMode="columnWidth" >

</GridView>