Getting error while building android
<p>For some days I used to build android successfully.
But from last 2-3 days i was unable to build it. its giving some errors like:</p>

<blockquote>
  <p>packages/apps/Calculator/src/com/android/calculator2/CalculatorDisplay.java:19:
  cannot access android.content.Context bad class file:
  android/content/Context.class(android/content:Context.class) unable to
  access file: corrupted zip file Please remove or make sure it appears
  in the correct subdirectory of the classpath. import
  android.content.Context;
                        ^ make: <em>*</em>
  [out/target/common/obj/APPS/Calculator_intermediates/classes-full-debug.jar]
  Error 41</p>
</blockquote>
