Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: Unsupported locator strategy: -android uiautomator

Issues/Bugs
1

Hi, I am trying to identify class as populated in UIAutomater tool however I am getting exception
Exception in thread “main” org.openqa.selenium.WebDriverException: unknown error: Unsupported locator strategy: -android uiautomator

String nms=driver.findElementsByAndroidUIAutomator(“new UiSelector().className(“android.widget.Button”)”).toString();