title: Android Data Binding: missing DataBinderMapper class
body: <pre><code>java.lang.NoClassDefFoundError: android.databinding.DataBinderMapper
          at android.databinding.DataBindingUtil.&lt;clinit&gt;(DataBindingUtil.java:31)
          at com.example.MainActivity.onCreate(MainActivity.java:13)
          at android.app.Activity.performCreate(Activity.java:5231)
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
          at android.app.ActivityThread.access$800(ActivityThread.java:135)
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
          at android.os.Handler.dispatchMessage(Handler.java:102)
          at android.os.Looper.loop(Looper.java:136)
          at android.app.ActivityThread.main(ActivityThread.java:5001)
          at java.lang.reflect.Method.invokeNative(Native Method)
          at java.lang.reflect.Method.invoke(Method.java:515)
          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
          at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>I hope this is a bug, does anyone face a similar problem? I unzipped <code>classes.jar</code> under the <code>exploded-arr</code> folder, but couldn't find the <code>DataBinderMapper</code> class.</p>
  
  <p>Any workarounds / fixes would be appreciated.</p>