I am learning at home during the outbreak of the android poor wretched one
Android it for me is very not friendly, dug a pit for me, every day I also is every time is darling jump , it's not, pit again

Why every time call fingviewbyid method always go wrong ah, or anywhere where error

CodePudding user response:

Eldest brother you create is kotlin project, but you are the whole of the Java code

CodePudding user response:

Private to define in class is not a method
Write on the outside of the oncreate method

CodePudding user response:

Agree with the second floor, you didn't do a good job in the Java foundation