你检查，以确保您在RES /价值/ strings.xml中定义的字符串资源？

Did you check to ensure that you have the string resource defined in res/values/strings.xml?

<string name="app_name">"My App"</string>

有时候，我注意到日食也将引发一些难以跟踪，如果您有任何错误，.xml文件错误。我不认为解析器恢复很好，有时你可能会产生误导的错误。

Sometimes, I've noticed eclipse will also throw errors that are hard to track if you have any .xml files with errors. I don't think the parser recovers well and sometimes the errors you get can be misleading.