代码在切换活动时崩溃[Android Studio]

I have run into an issue that closes my app upon switching activities. I don't mean for this to be a "fix my code" question, but if it seems that way, let me know what I can do to fix that. I am going to explain what the program does, and what it is supposed to do, and hopefully the good people of StackExchange can help me figure out a fix.I have run into an issue that closes my app upo