make: *** [out/target/common/obj/PACKAGING/checkapi-current-timestamp] 错误 38

             往android源码里添加自定义API，进行编译时，出现如下错误：

            ******************************
          You have tried to change the API from what has been previously approved.

          To make these errors go away, you have two choices:
         1) You can add "@hide" javadoc comments to the methods, etc. listed in the
          errors above.

         2) You can update current.xml by executing the following command:
         make update-api

         To submit the revised current.xml to the main Android repository,
         you will need approval.
         ******************************



make: *** [out/target/common/obj/PACKAGING/checkapi-current-timestamp] 错误 38

解决办法：make update-api