Android Development appears "unable to resolve XXX, or it is not a field" issue

In Android development, sometimes you run into a Java file that fails all references to ID and layout, "Cannot parse xxx, or it is not a field" error, and other files are normal. Often we use the means of checking or rebuilding XML files, clean projects, restarting Eclipse, and so on, but none of them works.

If you check the header code of the error file at this point, you will find a line:

  Import ANDROID.R

Yes, that's the code that pounded the ghost. The reason is that when you refer to the ID or layout, Eclipse automatically imports the system's own library, and the project's R file conflict, remove the OK.

Android Development appears "unable to resolve XXX, or it is not a field" issue