App crashes due to network issue

[chihuazhang]

Studies have shown that mobile apps are prone to crashes due to a network issue, mainly because successful network calls return unexpected or no data. And we found that when the field of the app(version 2.0.8)'s network return data (JSON format) is null, a random value or the network request fails (status code is 404), the app has crashed three times. the specific crash information is as follows:

java.lang.IllegalArgumentException: Path must not be empty.
at com.squareup.picasso.Picasso.load(Picasso.java:297)
at fr.masciulli.drinks.ui.adapter.LiquorsAdapter.onBindViewHolder(LiquorsAdapter.java:60)
at fr.masciulli.drinks.ui.adapter.LiquorsAdapter.onBindViewHolder(LiquorsAdapter.java:20)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6067)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6100)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5282)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5158)
at android.support.v7.widget.LayoutState.next(LayoutState.java:100)
at android.support.v7.widget.StaggeredGridLayoutManager.fill(StaggeredGridLayoutManager.java:1568)
at android.support.v7.widget.StaggeredGridLayoutManager.onLayoutChildren(StaggeredGridLayoutManager.java:678)
at android.support.v7.widget.StaggeredGridLayoutManager.onLayoutChildren(StaggeredGridLayoutManager.java:600)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3379)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3188)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3632)
at android.view.View.layout(View.java:16630)

android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=R$4Fwkz}Y/U0tQ}W[js]j]uUmUT|3*ThY9^Tq1UXP9.S]jCXK }
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1798)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512)
at android.app.Activity.startActivityForResult(Activity.java:3917)
at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:48)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:77)
at android.app.Activity.startActivityForResult(Activity.java:3877)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:859)
at android.app.Activity.startActivity(Activity.java:4200)
at android.app.Activity.startActivity(Activity.java:4168)
at fr.masciulli.drinks.ui.activity.DrinkActivity.lambda$setupViews$0(DrinkActivity.java:78)
at fr.masciulli.drinks.ui.activity.DrinkActivity$$Lambda$1.onClick(dalvik_source_frmasciullidrinks_32.apk)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add onError handling.
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:112)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: rx.exceptions.OnErrorNotImplementedException: HTTP 404 error
at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:386)
at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:383)
at rx.internal.util.ActionSubscriber.onError(ActionSubscriber.java:44)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:157)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.internal.operators.OperatorToObservableList$1.onError(OperatorToObservableList.java:101)
at rx.internal.operators.OperatorFilter$FilterSubscriber.onError(OperatorFilter.java:87)
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:268)
at rx.internal.operators.OperatorMerge$MergeSubscriber.checkTerminate(OperatorMerge.java:812)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:573)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:562)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onError(OperatorMerge.java:278)
at rx.internal.operators.OperatorMap$MapSubscriber.onError(OperatorMap.java:85)
at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:72)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.checkTerminated(OperatorObserveOn.java:276)
at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:219)
at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
... 7 more
Caused by: retrofit2.adapter.rxjava.HttpException: HTTP 404 error
at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:43)
at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:38)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:173)
at rx.internal.operators.OperatorSubscribeOn$1$1$1.request(OperatorSubscribeOn.java:80)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OperatorSubscribeOn$1$1.setProducer(OperatorSubscribeOn.java:76)
at rx.Subscriber.setProducer(Subscriber.java:205)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:8666)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)