title: Getting noClassFoundError libcore while runing the android project
body: <p>I am very new to android. I am developing my first application, Simple to Print Hello World.
  While Running the project I am getting the following exception.</p>
  
  <pre><code>Exception in thread "AsyncQueryWorker" java.lang.NoClassDefFoundError: libcore/io/Libcore
      at android.os.Process.myTid(Process.java:670)
      at android.os.HandlerThread_Delegate.run(HandlerThread_Delegate.java:69)
      at android.os.HandlerThread.run(HandlerThread.java:53)
  Caused by: java.lang.ClassNotFoundException: libcore.io.Libcore
      at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
      ... 3 more
  </code></pre>
  
  <p>Please help me out. </p>