如 ProGuard故障排除的链接所指示页在控制台日志中，则应将project.properties中的目标更改为包含缺少类的目标.在这种情况下:"android-18"或"Google Inc.:Google APIs:18".

As indicated by the link to the ProGuard Troubleshooting page in your console log, you should change the target in project.properties to a target that contains the missing classes. In this case: "android-18" or maybe "Google Inc.:Google APIs:18".

您仍然可以在AndroidManifest.xml中指定其他minSdkVersion.

You can still specify a different minSdkVersion in AndroidManifest.xml.

您应该不指定任何-libraryjars选项，因为Android构建过程已经为您指定了这些选项-您现在只会看到有关重复类的警告.实际上，Android构建过程还会为您指定其他大多数选项.

You should not specify any -libraryjars options, since the Android build process already specifies those options for you -- you'll just see warnings about duplicate classes now. In fact, the Android build process specifies most other options for you as well.