Search code examples
xpathappiumappium-android

Appium XPath Selector returns WebDriverException

I'm attempting to perform some automation of an Android app, using NGTest framework and UIAutomator.

The below is output from UI Automator - my XPath knowledge is not the hottest but I've attempted to select the parent of the Camera button using the following Java code:

WebElement e = driver.findElement(By.xpath("//android.widget.LinearLayout[@resource-id=com.instagram.android:id/tab_bar']"));

However this returns an exception:

    org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command.
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:19:58.91Z'

Could anyone guide me better on how to use XPath expressions to drill down into the tree from UIInspector? Should I be starting at the top and working my way down, or is it ok to try and grab children in this way?

I have also tried grabbing the camera icon directly using the bounds, but that didn't work either.

Attempted:

WebElement abc = driver.findElement(By.xpath ("//android.widget.ImageView[contains(@bounds,'[508,2119][571,2131]')']"));
    abc.click();

enter image description here

Solution

  • I think you are missing a quote sign at the beginning of your resource-id value. You are using:

    WebElement e = driver.findElement(By.xpath("//android.widget.LinearLayout[@resource-id=com.instagram.android:id/tab_bar']"));

    And it should be:

    WebElement e = driver.findElement(By.xpath("//android.widget.LinearLayout[@resource-id= 'com.instagram.android:id/tab_bar']"));

    This element explorer can really help you locating the elements