Question: Running app from Android studio on my device for testing is working fine. But when I am trying to install same app from Google Play, which is published under beta version getting error. I have uninstalled unsigned .apk from the device but am still not able to install from Google Play. 

Even cleared phone cache same result.

![enter image description here](https://i.stack.imgur.com/RL8Ls.jpg)

Answer: 
As it is a [KendoUI DropDown](http://demos.telerik.com/kendo-ui/dropdownlist/index)

You have to first click on the dropdown element.Could be `span` or `div`

I have taken the Demo Site to demsonstrate how you can select the values

I'm going to select `Orange` value from `Cap Color` DropDown

[![enter image description here](https://i.stack.imgur.com/sl1KX.png)](https://i.stack.imgur.com/sl1KX.png)

As you can see the element is `span` with class `k-widget k-dropdown k-header`.

You have to click on that first. Then only you'll get the ul list populated.

From that you can select any `k-item` by using the simple xpath.

> 
> //ul[@id='idOfUl']/li[@class='k-item' and text()='itemName']
> 
> 
> 

For you it should be

> 
> //ul[@id='Salutation\_listbox']/li[@class='k-item' and text()='Mr']
> 
> 
> 

**Sample Code**

```
public void testKendo() {
        driver.get("http://demos.telerik.com/kendo-ui/dropdownlist/index");

        String capColorDropDown = "//span[@role='listbox']";

        driver.findElement(By.xpath(capColorDropDown)).click();

        String itemName = "Orange";

        String listId = "color_listbox";

        String xpathForItem = "//ul[@id='" + listId + "']/li[@class='k-item' and text()='" + itemName + "']";

        driver.findElement(By.xpath(xpathForItem)).click();

        driver.quit();
    }

```
I understand that you requirement is accessing the element through classname. so i have modified it as xpath with attributes as class and text contained in it.

```
JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript("document.getelementsbyclassname('k-list-scroller').setAttribute('unselectable', 'off')");
js.executeScript("document.getelementsbyclassname('k-list k-reset').setAttribute('unselectable', 'off')");
driver.findElement(By.xpath("//li[text()='Mr'and class='k-item']")).click();

```