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No static method validate(J)Z in class Lrx/internal/operators/BackpressureUtils; or its super classes (declaration of 'rx.internal.operators.BackpressureUtils' appears in /data/app/com.sample.rxjavalearning-2/base.apk)
java.lang.NoSuchMethodError: No static method validate(J)Z in class Lrx/internal/operators/BackpressureUtils; or its super classes (declaration of 'rx.internal.operators.BackpressureUtils' appears in /data/app/com.sample.rxjavalearning-2/base.apk) at rx.internal.operators.OnSubscribeCreate$BaseEmitter.request(OnSubscribeCreate.java:132) at rx.internal.operators.OperatorTake$1$1.request(OperatorTake.java:106) at rx.Subscriber.setProducer(Subscriber.java:211) at rx.internal.operators.OperatorTake$1.setProducer(OperatorTake.java:90) at rx.Subscriber.setProducer(Subscriber.java:205) at rx.internal.operators.OnSubscribeCreate.call(OnSubscribeCreate.java:71) at rx.internal.operators.OnSubscribeCreate.call(OnSubscribeCreate.java:32) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable.unsafeSubscribe(Observable.java:8098) at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:232) at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:142) at rx.internal.operators.OnSubscribeFromIterable$IterableProducer.fastpath(OnSubscribeFromIterable.java:127) at rx.internal.operators.OnSubscribeFromIterable$IterableProducer.request(OnSubscribeFromIterable.java:70) at rx.Subscriber.setProducer(Subscriber.java:211) at rx.internal.operators.OnSubscribeFromIterable.call(OnSubscribeFromIterable.java:49) at rx.internal.operators.OnSubscribeFromIterable.call(OnSubscribeFromIterable.java:32) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable$2.call(Observable.java:162) at rx.Observable$2.call(Observable.java:154) at rx.Observable.unsafeSubscribe(Observable.java:8098) at rx.internal.operators.OperatorPublish.connect(OperatorPublish.java:186) at rx.internal.operators.OnSubscribeRefCount.call(OnSubscribeRefCount.java:71) at rx.internal.operators.OnSubscribeRefCount.call(OnSubscribeRefCount.java:38) at rx.Observable.unsafeSubscribe(Observable.java:8098) at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51) at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) at rx.Observable.subscribe(Observable.java:8191) at rx.Observable.subscribe(Observable.java:8158) at rx.Observable.subscribe(Observable.java:7962) at com.sample.rxjavalearning.scan.ScanActivity.performScanning(ScanActivity.java:132) at com.sample.rxjavalearning.scan.ScanActivity.onScanToggleClick(ScanActivity.java:83) at com.sample.rxjavalearning.scan.ScanActivity_ViewBinding$1.doClick(ScanActivity_ViewBinding.java:37) at butterknife.internal.DebouncingOnClickListener.onClick(DebouncingOnClickListener.java:22) at android.view.View.performClick(View.java:5698) at android.widget.TextView.performClick(TextView.java:10850) at android.view.View$PerformClick.run(View.java:22523) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7230) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)