This is going to cause issues for the regular StaggeredGridActivity example. Instead the SGV should request all children re-layout when changing the counts.

Add this method
```java
    private void requestLayoutChildren() {
        final int count = getChildCount();
        for (int i = 0; i < count; i++) {
            final View v = getChildAt(i);
            if (v != null) v.requestLayout();
        }
    }
```

Then call it when changing the column count.