How to capture screenshot of a WebElement within a webpage but not the entire screen or page through Selenium

问题

I have to capture a screenshot of an image of a particular website. Maybe this is 20% off entire screen, I have used below code, it is capturing the entire screen. Which is not helping me to solve the problem.

WebDriver driver = new FirefoxDriver();
driver.get("http://www.google.com/");
File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(scrFile, new File("c:\\tmp\\screenshot.png"));

回答1:

Can you try this

driver.get("https://stackoverflow.com/");
WebElement element = driver.findElement(By.xpath("//span[(text()='Stack Overflow') and @class='-img _glyph']"));
WrapsDriver wrapsDriver = (WrapsDriver) element;
File screenshot = ((TakesScreenshot) wrapsDriver.getWrappedDriver()).getScreenshotAs(OutputType.FILE);
Rectangle rectangle = new Rectangle(element.getSize().width, element.getSize().height, element.getSize().height, element.getSize().width);
Point location = element.getLocation();
BufferedImage bufferedImage = ImageIO.read(screenshot);
BufferedImage destImage = bufferedImage.getSubimage(location.x, location.y, rectangle.width, rectangle.height);
ImageIO.write(destImage, "png", screenshot);
File file = new File("C:\\123.png");
FileUtils.copyFile(screenshot, file);

回答2:

If your code trials getScreenshotAs() method will take the screenshot of the entire page.

To capture the screenshot of an WebElement within a particular webpage you can use the AShot() method importing ashot-1.4.4.jar while working with Selenium Java Client v3.14.0, ChromeDriver v2.41, Chrome v 68.0.

Note: AShot() method from ashot-1.4.4.jar works only with jQuery enabled Web Applications.

So as the website http://www.google.com/ is not jQuery enabled AShot() method from ashot-1.4.4.jar won't be able to take the required screenshot.

As an example we will take a snapshot from the website https://jquery.com/.

Code Block:

package aShot;

import java.io.File;

import javax.imageio.ImageIO;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

import ru.yandex.qatools.ashot.AShot;
import ru.yandex.qatools.ashot.Screenshot;

public class ashot_google_homepage_logo {

    public static void main(String[] args) throws Exception {

        System.setProperty("god.bless.you", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");
        ChromeOptions options = new ChromeOptions();
        options.addArguments("start-maximized");
        options.addArguments("disable-infobars");
        options.addArguments("--disable-extensions"); 
        WebDriver driver =  new ChromeDriver(options);
        driver.get("https://jquery.com/");
        WebElement myWebElement = new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath("//h3[contains(.,'Lightweight Footprint')]")));
        Screenshot myScreenshot = new AShot().takeScreenshot(driver, myWebElement);
        ImageIO.write(myScreenshot.getImage(),"PNG",new File("./Screenshots/elementScreenshot.png"));
        driver.quit();
    }
}