title: show error when compile lib that I wrapped for basic4android
body: <p>I wrapped a source github for b4a with Eclipse.</p>
  <p>I added core.jar but when I compile the project in b4a it shows this error:</p>
  <blockquote>
  <p>trouble processing &quot;java/com/lsjwzh/widget/materialloadingprogressbar/CircleProgressBar$OvalShadow.class&quot;: Ill-advised or mistaken usage of a core class (java.* or javax.*) when not building a core library.</p>
  <p>This is often due to inadvertently including a core library file in your application's project, when using an IDE (such as Eclipse). If you are sure you're not intentionally defining a core class, then this is the most likely explanation of what's going on.</p>
  <p>However, you might actually be trying to define a class in a core namespace, the source of which you may have taken, for example, from a non-Android virtual machine project. This will most assuredly not work. At a minimum, it jeopradizes the compatibility of your app with future versions of the platform.</p>
  </blockquote>
  <p><img src="https://i.stack.imgur.com/zpkck.png" alt="show image error" /></p>
  <p>I changed package name from</p>
  <pre><code>java.com.lsjwzh.widget.materialloadingprogressbar
  </code></pre>
  <p>to</p>
  <pre><code>com.lsjwzh.widget.materialloadingprogressbar
  </code></pre>
  <p>Why show in error -</p>
  <blockquote>
  <p>&quot;java/com/lsjwzh/widget/materialloadingprogressbar/CircleProgressBar$OvalShadow.class&quot;</p>
  </blockquote>
  <p>?</p>
  <p>I rebuilt the project in eclipse and compile with SimpleLibraryCompiler for b4a.</p>
  <p><img src="https://i.stack.imgur.com/dy2MQ.png" alt="and this is my project and OvalShadow Class" /></p>