SearchView in OptionsMenu not full width

Question

I have a working SearchView which expands in my OptionsMenu when the user taps on the search icon. However it only expands within the available space among the other Option

Answer 1

There are so many ways to solve this issue - I'll just add the one I've used in several apps.

I have my custom SearchView (with some other customization) which extends android.support.v7.widget.SearchView and in order to stretch to full width:

@Override
public void setLayoutParams(final ViewGroup.LayoutParams params) {
    params.width = ViewGroup.LayoutParams.MATCH_PARENT;
    super.setLayoutParams(params);
}