fix the problem that the MateriaSearchView will not appear when using…

[Jockio]

fix the problem that the MateriaSearchView will not appear when using AppBarLayout as the README.md file showed.

[YamadaKaito]

@Jockio Try use like this...

MW means layout_width=match_parent & layout_height=wrap_content

<CoordinatorLayout-MM>
   <AppBarLayout-MW>
      <FrameLayout-MW>
         <Toolbar-MW/>
         <MaterialSearchView-MW/>
      </FrameLayout>
   </AppBarLayout>
</CoordinatorLayout>

and

<com.miguelcatalan.materialsearchview.MaterialSearchView
                android:id="@+id/search_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"/>