switching windows through winium

[nissysaju]

I am automating an application where I have to click elements on next window after login . Below is the issue that I am observing, which is making my scripts fail.

Login is a small splash screen , which opens and I entered the Username and password correctly and logged in successfully

After that another screen is open(containing further functionalities) , and I'm able to locate the new window and but not able to click anything in that window.

I tried using this (web element is found , and line "the order button" gets printed but then no action is performed)
WebElement loginFrame = driver.findElementByClassName("classname of 2nd screen");
System.out.println("Click the Orders Button .............");
loginFrame.findElement(By.name("button")).click();

If anybody knows how to handle the switching between the windows or have any suggestions . Please let me know .