Sorry to hear you're having trouble with the examples. You're point is well made, and in fact what you're describing was our aim when constructing the code download package so it seems I may have missed the mark.
Each of the source-code ZIP files within the download package was created by zipping up a working Eclipse project and removing the bin / obj paths, so they should all be suitably Eclipse-chewable.
The ZIPs named 'Chapter#_Code_Snippets' should all be compilable / runnable when imported into Eclipse. Each contains a series of Android classes (Activities and Services mainly) that contain all the little snippets of code used in that Chapter with all the necessary import statements to make sure everything runs.
The 'Chapter#_Sample_SampleName' ZIPs should be fully working versions of each detailed walkthrough sample project snapshotted after each walkthrough.
I'd love to help make your experience easier -- is there a particular code_snippet / sample project that's not working in the way you'd like? Alternatively, is there a way I can improve how the projects are packaged?