code: public boolean detectOperaAndroidTablet()
     {
        if (userAgent.indexOf(engineOpera) != -1
                 && (userAgent.indexOf(deviceAndroid) != -1
                 && userAgent.indexOf(deviceTablet) != -1)) {
           return true;
        }
        return false;
     }
docs: Detects Opera Mobile on an Android tablet.
  
  @return detection of an Opera browser on an Android tablet