（org.openqa.selenium.WebDriverException: Unable to launch the app: Error: Trying to start logcat capture but it's already started! ）错误解决办法
新增：
capabilities.setCapability("autoLaunch",false);
将setup中的：
driver = new AndroidDriver(new URL("http://127.0.0.1:" + port + "/wd/hub"), capabilities);
driver.launchApp();
第二句：
driver.launchApp()
注释掉