为什么R不存在错误出现在android中? [英] why does R does not exist error come in android?

问题描述

packages/apps/Myfolder/src/com/android/myfolder/MyFile.java:196: package R does not exist
                  addPreferencesFromResource(R.xml.myfile);
                                              ^
packages/apps/Myfolder/src/com/android/myfolder/MyFile.java:344: package R does not exist
        menu.add(0, MENU_SAVE, 0, R.string.menu_save)
                                   ^
packages/apps/Myfolder/src/com/android/myfolder/MyFile.java:346: package R does not exist
        menu.add(0, MENU_CANCEL, 0, R.string.menu_cancel)
                                     ^
packages/apps/Myfolder/src/com/android/myfolder/MyFile.java:454: package R does not exist
                     errorMsg = mRes.getString(R.string.error_empty);
                                                ^
packages/apps/Myfolder/src/com/android/myfolder/MyFile.java:458: package R does not exist
                     errorMsg = mRes.getString(R.string.error_empty);

推荐答案

检查您的资源文件中是否有任何错误或任何缺少的依赖项.这两种情况中的任何一种都会导致 R.java 类无法生成代码，从而导致出现很多像您显示的那样的错误.

Check if there are any errors in your resource files or any missing dependencies. Either of these will cause the R.java class to not be code-generated and thus a lot of errors like the ones you have shown.

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