Is ATOK ?

IsATOK.pas

function IsATOK: Boolean;
var
  Name: JString;
begin
  Result := False;

  Name :=
    TJSettings_Secure.JavaClass.getString(
      TAndroidHelper.Context.getContentResolver(),
      TJSettings_Secure.JavaClass.DEFAULT_INPUT_METHOD);

  if (Name = nil) then
    Exit;

  Result := JStringToString(Name).ToLower.IndexOf('atok') > -1;
end;