<ScrollView
    android:layout_marginTop="60dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <GridView
            android:id="@+id/gridview"
            android:columnWidth="90dp"
            android:numColumns="4"
            android:verticalSpacing="10dp"
            android:horizontalSpacing="10dp"
            android:stretchMode="columnWidth"
            android:gravity="center"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            </GridView>
    </RelativeLayout>

</ScrollView>

为什么是这样？应该会两行了，就一行