java.lang.NoClassDefFoundError：如何解决此错误？
[英]java.lang.NoClassDefFoundError: how do I fix this error?
问题描述
I am developing an Android application which makes use of the Osmdroid maps api. 
我正在开发一个使用Osmdroid maps api的Android应用程序。 I have added the library as an external jar in my build path and I do not get any errors during compile time. 我已将库作为外部jar添加到构建路径中，并且在编译时未出现任何错误。 However, upon device deployment I get the following error: 但是，在部署设备时，出现以下错误：
03-27 16:18:50.986: E/AndroidRuntime(3306): java.lang.NoClassDefFoundError: org.osmdroid.util.GeoPoint
I have done some googgling and it is still a mystery to me. 我已经进行了一些搜索，对我来说仍然是一个谜。
Here is my IDE configuration. 这是我的IDE配置。
Eclipse: Indigo Release version 2
Java SDK: 1.6.0_31
Android SDK: 17
2 个解决方案
解决方案1
11 已采纳 2012-03-27 20:38:33
您需要进入Build Path / Order and Export，并从SDK 17开始检查库。然后清理您的项目。
解决方案2
0 2013-03-12 09:12:16
I doubt about you and your project. 我怀疑您和您的项目。 From my viewpoint, I see you have a good design. 从我的角度来看，我认为您的设计不错。 But why are you working with Build Path / Order and Export? 但是，为什么要使用“构建路径/订单和导出”？ Honestly I've never gone to that tab from the first day I worked with Eclipse. 老实说，从我使用Eclipse的第一天起，我就再也没有去过这个标签。
To import jar files as libraries, use tab Libraries -> add external Jars. 要将jar文件导入为库，请使用标签库->添加外部Jar。
And I'm sorry I don't know about game programming, this is just a suggestion: make sure your engine fits what Android supports. 很抱歉，我对游戏编程一无所知，这只是一个建议：请确保您的引擎适合Android支持的功能。 For example Android doesn't support javax.imageio. 例如，Android不支持javax.imageio。 If not, the app can be compiled with external jars, but can be crashed in runtime. 如果不是，则可以使用外部jar编译该应用程序，但可能会在运行时崩溃。
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