Unable to resolve superclass error when referencing .jar library

android, android-library, classnotfoundexception

Solution

Just started to get this issue after upgrading to ADT 17.

Discovered that external .jar files need to be in a 'libs' (with an s) folder otherwise their classes are not included in the .dex file that is created. Before the upgrade everything worked fine with my .jar files in a 'lib' folder (no s).

Problem

- I did an Android project and run it. It ran successfully. - I developed a web service in Java and hosted it. It ran successfully. - I exported the webservice into a .jar and added it to my Android project. - When I try to call a method in the web service I get an `Unable to resolve superclass` error. My error log: ``` Unable to resolve superclass of Lweb/service/RandomWordGeneratorService; (73) Link of class 'Lweb/service/RandomWordGeneratorService;' failed Could not find class 'web.service.RandomWordGeneratorService', referenced from method tam.miru.Login$1.onClick VFY: unable to resolve new-instance 110 Lweb/service/RandomWordGeneratorService;) in Ltam/miru/Login$1; VFY: replacing opcode 0x22 at 0x005a VFY: dead code 0x005c-006e in Ltam/miru/Login$1;.onClick (Landroid/view/View;) ```

Original source

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