The Android API is intended to implement ANT communication on an Android based phone that has the properly enabled hardware.
If you are integrating an ANT module into a custom design, you will need to write your own drivers to communicate with the module - UART or SPI. You can find more details on the interfacing requirements in the "Interfacing with ANT General Purpose Chipsets and Modules" document http://www.thisisant.com/pages/developer-zone/ant-protocol-and-usage
The error you are seeing still means that there is some problem linking the two projects together. Unfortunately, Eclipse does not easily allow exporting multiple projects with proper linking without having to adjust the paths when importing.
You might want to download the latest version of the Android API from our website - all code is included in a single project to avoid these linking issues.