Appium Blank Screenshot in Real Devices - screenshot

When I am taking screenshot using the below code I am getting blank screenshots. I tried putting sleep but that too is not working.
Please advice. It's not that I am getting all blank screens, I am getting few blank screens and few proper screenshots. I dont know what I am doing wrong. I didn't hear appium has any issues in taking screenshots.
Help me in figuring out a solution.
Code:
WebDriver driver1 = new Augmenter().augment(AppiumBaseTest.getAndroidDriver());
File file = ((TakesScreenshot) driver1).getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(file, new File(System.getProperty("test.screenshot.dir") + href));
Code:
FileUtils.copyFile(((TakesScreenshot) AppiumBaseTest.getAndroidDriver()).
getScreenshotAs(OutputType.FILE), new File(System.getProperty("test.screenshot.dir") + href));
I tried taking screenshot using appium driver also and that is also giving me the same issue of blank screenshot. Some are proper and some are blank.
I have tried giving wait for 7 seconds before each screenshot but of no use.
ThankS,
Rajit

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How to create a better screenshot during the selenium automation in JAVA?

I am creating automated test cases by using selenium 3 & testng. Everything looks good, except the screenshots that are generated. Here is my piece of code to create screenshots PNG files:
file = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
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which is pretty standard way to do it, but the quality of the created PNG file is not so good.
As you can see from following PNG file. In the picture, the email value ( "....#yahoo.com"), which should be at the upper-right corner of the web-page and should be as high as the other navigation bar elements on the left side. But in the created PNG file, this item has been squeezed to the lower level, which is not what I am looking for. Any ideas ? Thanks for the help !
Make sure your window is the right size when you're opening the browser. You can do this via visual inspection or using Selenium's getSize method. I assume you're using Java, but here it is in Python as well.
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Afterwards, your screenshot should look like the window does.
Please try this,
public void calltakeScreenShot(String SSName) throws Exception
{
File screen = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
BufferedImage img = ImageIO.read(screen);
File filetest = Paths.get(".").toAbsolutePath().normalize().toFile();
ImageIO.write(img, "png", new File(filetest + "\\Screenshots\\" + SSName + ".png"));
}
Additionally Here you just need to pre-created Screenshots folder in your Project directory. It will store it by getting absolute path of your project. Also you can manage screenshot name by passing argument.
After several day's research, here is my latest summary.
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B). For the same selenium test script, if I am including one extra ChromeOptions setting, which is "--headless", I will not see any browser being brought up during the execution. And once execution is finished, I will get the screenshot with such squeezed web elements.
Comments ?

How to attach screen shot to XCUITest report in Jenkins. Can only see screenshot if running through XCODE

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https://github.com/supermarin/xcpretty/issues/251
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https://github.com/supermarin/xcpretty/issues/251
You need to point attachment.name as here
func takeScreenshot() {
let screenshot = XCUIScreen.main.screenshot()
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See the below link for help:
http://www.seleniumeasy.com/selenium-tutorials/webdriver-file-upload-using-robots
I've used this somewhere , hope you can relate this:
Robot rb = new Robot();
rb.keyPress(KeyEvent.VK_A);
rb.keyRelease(KeyEvent.VK_A);
rb.keyPress(KeyEvent.VK_L);
rb.keyRelease(KeyEvent.VK_L);
rb.keyPress(KeyEvent.VK_E);
rb.keyRelease(KeyEvent.VK_E);
rb.keyPress(KeyEvent.VK_R);
rb.keyRelease(KeyEvent.VK_R);
rb.keyPress(KeyEvent.VK_T);
rb.keyRelease(KeyEvent.VK_T);
Thread.sleep(4000L);
rb.keyPress(KeyEvent.VK_TAB);
rb.keyRelease(KeyEvent.VK_TAB);
Thread.sleep(4000L);
rb.keyPress(KeyEvent.VK_ENTER);
rb.keyRelease(KeyEvent.VK_ENTER);
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If you need more help, kindly provide me code and what you want to upload , I'll help you to resolve your issue.
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Screen sikuliObject= new Screen(); // Creating Screen class object
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Thread.sleep(2000); // Wait for 2 seconds for upload window pop-up.
sikuliObject.type("Path of the uploading file and click on enter."+ Key.ENTER );
//Path of the uploading file and click on enter.
Thread.sleep(2000); // Wait for 2 seconds to load the file.
I've once had a similar problem (I'm not sure anymore if it threw a "not visible" exception or the "could not focus"one) and the problem was that the input Element wasn't accessible because it had no dimensions. I've changed the DOM information using the JavaScriptExecuter and afterwards it worked fine. Just go through your page with Firebug and look if the element is really visible.

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This is not a real answer, it's just a total hack! I have to get some things done so I'll investigate predicates and WebDriverWaits later.
I was creating a list of webelements:
List wElements = getElements()
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List wElementsB = getElements()
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I tried sleeping and telling the webdriver to wait. but those failed as well.
Thanks Guys!