实例化对象时出现Appium错误

Question

这是我正在创建的BeforeClass（Java，Appium，TestNG）

私人AndroidDriver驱动程序;

@BeforeClass
public void setUp() throws MalformedURLException{
    DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
    desiredCapabilities.setCapability(MobileCapabilityType.APPIUM_VERSION, "1.7.1");
    desiredCapabilities.setCapability(MobileCapabilityType.PLATFORM_NAME,"Android");
    desiredCapabilities.setCapability("deviceName", "9NLJA17619012618");
    desiredCapabilities.setCapability("appActivity", ".activity.LaunchActivity");
    desiredCapabilities.setCapability("appPackage", "com.aaa.app");     
    desiredCapabilities.setCapability("platformVersion", "7.1.2");
    URL url = new URL("http://localhost:4723/wd/hub");
    driver = new AndroidDriver(url,desiredCapabilities);
}

（我知道MobileCapabilityType和其他没有这种格式的混合，但我认为这不是我的观点）

然后是一堆@Test

出现此错误：

Failed tests:   setUp(tests.TestShop): 
class io.appium.java_client.android.AndroidDriver has interface io.appium.java_client.AppiumDriver as super class

任何线索？