custom adapter view, child not being measured correctly

I wrote a GridView that arranges it's children like the image below.

Here's the code:

MyGridView.onLayout:

    ...
    while (position < mAdapter.getCount()) {
            View newBottomChild = mAdapter.getView(position, null, this);
            addAndMeasureChild(newBottomChild);
            position++;
    }
    ...

and here's the addAndMeasureChild:

LayoutParams params = child.getLayoutParams();
if (params == null) {
    params = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
}
addViewInLayout(child, -1, params, true);
child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);

and the item_layout.xml

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
        android:layout_width="60dp"
        android:layout_height="60dp" >

        <ImageView
            android:id="@+id/image_content"
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:contentDescription="@string/content_description"
            android:scaleType="centerCrop" >
        </ImageView>

    </RelativeLayout>

• The reason why I put the ImageView into a RelativeLayout is that if I don't, the item will be displayed very large,large enough to fill the entire GridView.


• I measured the child with UNSPECIFIED MeasureSpec because using other measure spec will not display any item.

Anyway,my grid view is now working as I want, but I don't want to put that ImageView in a RelativeLayout.

Any help will be appreciated.