braintree_android: Android Pay fails with Request Failed: unexpected error

Hi there,

I am starting Braintree Android v2 Drop In using the following code with a production client roken generated on my nodejs server application. PayPal and CC work fine but I am getting an error when tapping on Android Pay. Error is included below the code. Please help me here!

Cart cart = Cart.newBuilder()
            .setCurrencyCode("USD")
            .setTotalPrice("1.00")
            .addLineItem(LineItem.newBuilder()
                    .setCurrencyCode("USD")
                    .setDescription("Description")
                    .setQuantity("1")
                    .setUnitPrice("1.00")
                    .setTotalPrice("1.00")
                    .build())
            .build();

      PaymentRequest paymentRequest = new PaymentRequest()
                .clientToken(clientToken)
                .actionBarTitle("Test")
                .primaryDescription("Test desc")
                .secondaryDescription("1 Item")
                .amount("$1.00")
                .submitButtonText("Give Now");
        paymentRequest.androidPayCart(cart);
        paymentRequest.androidPayRequestCode(MASKED_WALLET_REQUEST_CODE);

     startActivityForResult(this, paymentRequest.getIntent(getActivity()), DROPIN_ACTIVITY_REQUEST_CODE);

The Eror that comes up on the screen is “Request Failed”, “An unexpected error has occurred. Please try again later”.

I am getting the following logcat when the error occurs.

09-13 00:49:40.802 3499-4137/? E/Parcel: Class not found when unmarshalling: com.google.android.gms.wallet.shared.BuyFlowConfig
                                         java.lang.ClassNotFoundException: com.google.android.gms.wallet.shared.BuyFlowConfig
                                             at java.lang.Class.classForName(Native Method)
                                             at java.lang.Class.forName(Class.java:324)
                                             at android.os.Parcel.readParcelableCreator(Parcel.java:2404)
                                             at android.os.Parcel.readParcelable(Parcel.java:2358)
                                             at android.os.Parcel.readValue(Parcel.java:2264)
                                             at android.os.Parcel.readArrayMapInternal(Parcel.java:2614)
                                             at android.os.BaseBundle.unparcel(BaseBundle.java:221)
                                             at android.os.BaseBundle.getString(BaseBundle.java:920)
                                             at android.content.Intent.getStringExtra(Intent.java:6195)
                                             at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:2699)
                                             at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:2161)
                                             at com.android.server.am.ActivityManagerService.startActivityInPackage(ActivityManagerService.java:6855)
                                             at com.android.server.am.PendingIntentRecord.sendInner(PendingIntentRecord.java:310)
                                             at com.android.server.am.ActivityManagerService.startActivityIntentSender(ActivityManagerService.java:6613)
                                             at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:292)
                                             at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3990)
                                             at android.os.Binder.execTransact(Binder.java:453)
                                          Caused by: java.lang.ClassNotFoundException: com.google.android.gms.wallet.shared.BuyFlowConfig
                                             at java.lang.Class.classForName(Native Method)
                                             at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
                                             at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
                                             at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
                                             at java.lang.Class.classForName(Native Method) 
                                             at java.lang.Class.forName(Class.java:324) 
                                             at android.os.Parcel.readParcelableCreator(Parcel.java:2404) 
                                             at android.os.Parcel.readParcelable(Parcel.java:2358) 
                                             at android.os.Parcel.readValue(Parcel.java:2264) 
                                             at android.os.Parcel.readArrayMapInternal(Parcel.java:2614) 
                                             at android.os.BaseBundle.unparcel(BaseBundle.java:221) 
                                             at android.os.BaseBundle.getString(BaseBundle.java:920) 
                                             at android.content.Intent.getStringExtra(Intent.java:6195) 
                                             at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:2699) 
                                             at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:2161) 
                                             at com.android.server.am.ActivityManagerService.startActivityInPackage(ActivityManagerService.java:6855) 
                                             at com.android.server.am.PendingIntentRecord.sendInner(PendingIntentRecord.java:310) 
                                             at com.android.server.am.ActivityManagerService.startActivityIntentSender(ActivityManagerService.java:6613) 
                                             at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:292) 
                                             at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3990) 
                                             at android.os.Binder.execTransact(Binder.java:453) 
                                          Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available