No virtual method newJsonReader 解决办法

运行一个安卓程序，出现以下错误原因：

FATAL EXCEPTION: RxIoScheduler-3
Process: com.test.app, PID: 12041
java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread.
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:59)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:818) Caused by: java.lang.NoSuchMethodError: No virtual method newJsonReader(Ljava/io/Reader;)Lcom/google/gson/stream/JsonReader; in class Lcom/google/gson/Gson; or its super classes (declaration of ‘com.google.gson.Gson’ appears in /system/framework/android.urovo.device.jar) at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:35) at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:25) at retrofit2.ServiceMethod.toResponse(ServiceMethod.java:119) at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:218) at retrofit2.OkHttpCall.execute(OkHttpCall.java:180) at retrofit2.adapter.rxjava.CallExecuteOnSubscribe.call(CallExecuteOnSubscribe.java:40) at retrofit2.adapter.rxjava.CallExecuteOnSubscribe.call(CallExecuteOnSubscribe.java:24) at retrofit2.adapter.rxjava.BodyOnSubscribe.call(BodyOnSubscribe.java:36) at retrofit2.adapter.rxjava.BodyOnSubscribe.call(BodyOnSubscribe.java:28) at rx.Observable.unsafeSubscribe(Observable.java:10144) at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48) at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) at rx.Observable.unsafeSubscribe(Observable.java:10144) at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48) at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33) at rx.Observable.unsafeSubscribe(Observable.java:10144) at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:248)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:148) at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:77) at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102) at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138) at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129)
at rx.Observable.unsafeSubscribe(Observable.java:10144)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.Observable.unsafeSubscribe(Observable.java:10144)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10144)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)
at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
at rx.Observable.unsafeSubs

按照网上的解决办法，更新gson依赖包到最新版本2.8.2，但依然没有解决问题。

这个APP是在优博讯的POS机器上运行的，在优博讯另外POS上运行都没有问题。而且这个APP在很多安卓手机上运行都没有问题，偏偏这款POS系统上出现问题。 后找了个优博讯刷机包文件，300多兆，POS上操作系统重新刷机了，问题解决。

2018年3月18日