两种解决方案：Two actions, first:1.Right click on the project and go to "Properties"2.Select "Java Build Path" on the left3.Open "Source" tab4.Click "Add Folder..." and check "gen" and "src"second: (because the previous action asked me to remove something... I do not remember what it was...)1. Right click on the project and go to "Properties"2. Select "Java Build Path" on the left3. Open Libraries "tab"4. Add an external JAR. Add the Google API that is in your android directory (android-sdk\platforms\android-yourversion现在基本都解决了.....