I have an Android Studio project where I am making a school-project Android app which transfers files between two devices, and while moving some methods and variables from my ChooseFile.java to my TransferFragment.java (i also changed the fragment’s xml layout file with the right context) all seemed to go well, until I encountered this error after launching my app once on an emulator device and opening the Transfer Fragment:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference