你应该先初始化它: try { WebDriver driver = new AndroidDriver(); // And now use this to visit Google driver.get("http://www.google.com"); // Find the text input element by its name WebElement element = driver.findElement(By.name("q")); // Enter something to search for element.sendKeys("Cheese!"); // Now submit the form. WebDriver will find the form for us from the element element.submit(); // Check the title of the page System.out.println("Page title is: " + driver.getTitle()); driver.quit(); } catch (Exception e) { e.printStackTrace(); }