TOPIC:

in this procedure S (VAriable) resul alway '' (Nullstring) , WHY?
function TAndroidModule1.TabExists(itemTitle: string): Boolean;
var
  i: Integer;
  s: string;
begin
  Result := False;
  for i := 0 to TabLayout1.GetTabCount() - 1 do
  begin
    s:= TabLayout1.GetTitle(i);
    showmessage(s+' = '+ itemtitle);
    if s = itemTitle then
    begin
      Result := True;
      Break;
    end;
  end;       

My suggestion is, post to  LAMW GIT page
for more help.
We just hosting LAMW to CT, with proper MODs...