title: Updating sdk got NoClassDefFoundError  for zxing
body: <p>How to solve this NoClassDefFoundError.
  I have integrated Zxing in my app, every thing is working fine. Then I have updated my sdk and eclipse plugin, and when I run the project the log says   </p>
  
  <pre><code>03-27 17:27:45.173: E/AndroidRuntime(8917): FATAL EXCEPTION: main
  03-27 17:27:45.173: E/AndroidRuntime(8917): java.lang.ExceptionInInitializerError
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.Class.newInstanceImpl(Native Method)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.Class.newInstance(Class.java:1429)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.os.Handler.dispatchMessage(Handler.java:99)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.os.Looper.loop(Looper.java:123)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.main(ActivityThread.java:4627)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.reflect.Method.invokeNative(Native Method)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.reflect.Method.invoke(Method.java:521)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at dalvik.system.NativeStart.main(Native Method)
  03-27 17:27:45.173: E/AndroidRuntime(8917): Caused by: java.lang.NoClassDefFoundError: com.google.zxing.ResultMetadataType
  03-27 17:27:45.173: E/AndroidRuntime(8917):     at records.model.CaptureActivity.&lt;clinit&gt;(CaptureActivity.java:94)`
  </code></pre>