ADK and Eclipse woes - com.android.future and USBAccessory?

I am trying to get ADK (Accessory Development Kit) set up with Eclipse, but after updating to API 12, to run the demokit Hello World, I get the 29 errors, the first few looking like:

com.android.future cannot be resolved, etc
UsbA开发者_如何学JAVAccessory cannot be resolved to a type

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You need to set your build target to Google APIs, not Android. Click on Project->Properties, then in the dialog box, select Google APIs (2.3.3) instead of Android 2.3.3.