run time exception in demo

[achinverma]

Hi, i have used your library and demo but some time it is giving me the following errors i am using eclipse

05-06 10:13:17.747: E/AndroidRuntime(9318): FATAL EXCEPTION: main 05-06 10:13:17.747: E/AndroidRuntime(9318): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.etsy.android.sample/com.etsy.android.sample.StaggeredGridActivityFragment}: android.view.InflateException: Binary XML file line #1: Error inflating class com.etsy.android.grid.StaggeredGridView 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.ActivityThread.access$600(ActivityThread.java:123) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.os.Handler.dispatchMessage(Handler.java:99) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.os.Looper.loop(Looper.java:137) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.ActivityThread.main(ActivityThread.java:4424) 05-06 10:13:17.747: E/AndroidRuntime(9318): at java.lang.reflect.Method.invokeNative(Native Method) 05-06 10:13:17.747: E/AndroidRuntime(9318): at java.lang.reflect.Method.invoke(Method.java:511) 05-06 10:13:17.747: E/AndroidRuntime(9318): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:817) 05-06 10:13:17.747: E/AndroidRuntime(9318): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584) 05-06 10:13:17.747: E/AndroidRuntime(9318): at dalvik.system.NativeStart.main(Native Method) 05-06 10:13:17.747: E/AndroidRuntime(9318): Caused by: android.view.InflateException: Binary XML file line #1: Error inflating class com.etsy.android.grid.StaggeredGridView 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.view.LayoutInflater.createView(LayoutInflater.java:606) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 05-06 10:13:17.747: E/AndroidRuntime(9318): at com.etsy.android.sample.StaggeredGridActivityFragment$StaggeredGridFragment.onCreateView(StaggeredGridActivityFragment.java:55) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:551) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1133) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.Activity.performStart(Activity.java:4480) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1929) 05-06 10:13:17.747: E/AndroidRuntime(9318): ... 11 more 05-06 10:13:17.747: E/AndroidRuntime(9318): Caused by: java.lang.reflect.InvocationTargetException 05-06 10:13:17.747: E/AndroidRuntime(9318): at java.lang.reflect.Constructor.constructNative(Native Method) 05-06 10:13:17.747: E/AndroidRuntime(9318): at java.lang.reflect.Constructor.newInstance(Constructor.java:417) 05-06 10:13:17.747: E/AndroidRuntime(9318): at android.view.LayoutInflater.createView(LayoutInflater.java:586) 05-06 10:13:17.747: E/AndroidRuntime(9318): ... 24 more 05-06 10:13:17.747: E/AndroidRuntime(9318): Caused by: java.lang.NoClassDefFoundError: com.etsy.android.grid.R$styleable 05-06 10:13:17.747: E/AndroidRuntime(9318): at com.etsy.android.grid.StaggeredGridView.(StaggeredGridView.java:153) 05-06 10:13:17.747: E/AndroidRuntime(9318): at com.etsy.android.grid.StaggeredGridView.(StaggeredGridView.java:145) 05-06 10:13:17.747: E/AndroidRuntime(9318): ... 27 more