Android Studio keeps giving a file not found exception. Not sure why

Question

I'm making an Android app in Android Studio. I'm trying to get the app to load an .xlsx file. But whenever I do so it gives me a "File not found" exception.

The file is stored in the folder that Android Studio itself created when i selected "Directory" and chose "Assets". I selected the "src/main/assets" folder.

In the screenshots below you can see the error I am getting, the folder structure, the code I use to call the file and a notification I noticed that pops up when debugging. I think the last picture with the notification may not be relevant for this error but I included it just in case it might be relevant.

What have I tried so far?

• Testing with another file. So I have tested with filename and filename2. Respectively a .xlsx file and a .png file.
• I have restarted Android Studio.
• I have cleaned the project, clicked make project and rebuilt the project.
• I have tried renaming the file so it has all lower case letters.

Any suggestions as to why my Android studio does not find this file?

Answer 1

As CommonsWare suggested in a comment I could try look outside Android Studio. And it turned out that despite there only appearing one "Assets" folder in Android Studio there were 4 folders. The files were in "androidTest" and i moved them to "main". Then it found the file.