I have a big problem. Last I copied a CardView with RecyclerView from a video. After that I created a new empty activity, but the Javafile didn't want to accept the corresponding XML file. And if I go with ALT + ENTER he suggests to me to create your xml file, but afterwards he tells me it already exists. So I can open the XML file, the program recognizes it but it is not recognized in the Java data and I cannot select it there either. There a screen shot, There a picture from solution research, And There a photo of the xml File. Can someone help me there? Thank you in advance!