android程序出现错误 Field requires API level 5 (current min is 1):

android程序出现了奇怪的错误  Field requires API level 5 (current min is 1): ......

解决办法：

Right click on the project folder > Android tools > Clear Link Markers

英文网站找的，细节就看不懂了。参见
http://stackoverflow.com/questions/10322482/android-lint-erroneously-thinks-min-sdk-version-is-1