Changing action bar searchview hint text color

SearchView searchView= (SearchView) findViewById(R.id.searchView1);
int id = searchView.getContext()
                   .getResources()
                   .getIdentifier("android:id/search_src_text", null, null);
TextView textView = (TextView) searchView.findViewById(id);
textView.setTextColor(Color.WHITE);

android:actionBarWidgetTheme of your main theme should point to a style that has a android:textColorHint in it. That one will allow changing the hint text color of the search view.

searchView.setQueryHint(Html.fromHtml("<font color = #ffffff>" + getResources().getString(R.string.hintSearchMess) + "</font>"));