There are red flags everywhere saying not to modify R.java and even when I try to, it prompts me to stop.
Maybe something was trying to tell you that you shouldn't touch the file.
But that being said:
public static final int 10ca16=0x7f05084a;
// ^^^^^^
Variable names in Java cannot start with a number. This is a restriction that's been on C-derived languages since they were invented.
Start the variable name with an underscore or letter, like _10ca16
or ca10_16
(or whatever you prefer).