error: xml cannot be resolved or is not a field, but res/xml/settings_headers.xml exists.
Every xml file will have its own ID in R.java, which is AUTO-GENERATED by eclipse when building project. But if the xml file is wrong, then there‘s no ID for it. So just fix the xml file first, then build project, it will be ok.
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xml cannot be resolved or is not a field
原文：http://blog.csdn.net/llrraa2010/article/details/26878391