在我的项目，我需要使用外部库。该库由的.class 文件。 > Java构建路径 - - 我一直使用的属性添加的文件夹与此库到我的项目>库 - >添加类文件夹。我可以编译项目没有任何问题，但是当我运行它，我得到未能解​​决XY 并在那里创建类的实例，从导入文件行调试器停止。

In my project, I need to use external library. That library consists of .class files. I have added folder with this library to my project using properties -> Java Build Path -> Libraries -> Add class folder. I can compile project without any problem, but when I run it, I get failed resolving xy and debugger stops on line where I create instance of class from imported files.

我猜外部库我心不是使用链接到我的.apk文件。我该如何解决这个问题？我试图查看这个库中的排序和导出选项卡假设，将库导出我的申请。但它没有工作。

I guess the external library I use isnt linked to my .apk file. How can I fix this? I have tried to check this library on "Order and Export" tab assuming that, it will export the library with my application. But it didnt work.

我怎么能这个库链接到我的项目.apk文件？我是否需要以某种方式先在设备上安装这个库？我是否需要复制该库的应用程序文件夹？

How can I link this library to my project .apk? Do I need to somehow install this library on device first? Do I need to copy this library in application folder?

PS：我使用的Eclipse朱诺，Android SDK中的目标10

PS: I'm using Eclipse Juno, android SDK target 10.

感谢您

更新

我有这个库复制到库文件夹。外部库路径是：

I have this library copied in libs folder. External library path is:

my_project/libs/sk/aicit/leg/libraries*.class

我已经加入 ./库文件夹中的库项目的设置。 我不要有的.jar 版本库中，只有的.class 文件。

I have added ./libs folder in Libraries settings of project. I do not have .jar version of this library, only .class files.

我也有烃源$ C ​​$这个库的C，但我没有想包括它的类在我的项目，它有它自己的依赖，我想只是链接像图书馆。它的外部库我还没有写。

I have also souce code of this library, but I didnt want to include its classes in my project, it has its own dependencies, I wanted to just "link" it like library. Its an external library I havent written.

更新2

我抄从库中的所有源文件到我的项目的src /目录。我从Java构建路径中删除库。我可以STIL编译我的项目，但是当我运行它的iget

I have copied all the source files from library to my projects "src/" dir. I have removed Library from Java build path. I can stil compile my project, but when I run it Iget

FATAL EXCEPTION:main
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{
com.example/myvideorecord/com.example.myvideorecord.Robot}: java.langNullPointerException
...

我能做些什么，如何调试这个错误？ ：（

What can I do, how to debug this error? :(

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