Fatal Exception: java.lang.NullPointerException Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

[bertoven]

Constantly getting notified of dozens of crashes in crashlytics for our app.
We are currently using dotpay android sdk version 2.0.203 but problem already existed on earlier versions.
Unfortunately we were not able to reproduce the problem ourselves.

Stacktrace:

java.net.URLEncoder.encode (URLEncoder.java:204)
pl.mobiltek.paymentsmobile.dotpay.utils.WebViewHelper$QueryString.encode (WebViewHelper.java:152)
pl.mobiltek.paymentsmobile.dotpay.utils.WebViewHelper$QueryString.add (WebViewHelper.java:145)
pl.mobiltek.paymentsmobile.dotpay.utils.WebViewHelper.getQueryString (WebViewHelper.java:56)
pl.mobiltek.paymentsmobile.dotpay.view.WebViewProxy.postPaymentData (WebViewProxy.java:123)
pl.mobiltek.paymentsmobile.dotpay.fragment.WebViewProxyFragment.postPaymentMethodData (WebViewProxyFragment.java:100)
pl.mobiltek.paymentsmobile.dotpay.presenter.WebViewProxyPresenter.payWithPaymentMethodData (WebViewProxyPresenter.java:22)
pl.mobiltek.paymentsmobile.dotpay.fragment.WebViewProxyFragment.onCreateView (WebViewProxyFragment.java:65)
androidx.fragment.app.Fragment.performCreateView (Fragment.java:2963)
androidx.fragment.app.FragmentStateManager.createView (FragmentStateManager.java:518)
androidx.fragment.app.FragmentStateManager.moveToExpectedState (FragmentStateManager.java:282)
androidx.fragment.app.FragmentStore.moveToExpectedState (FragmentStore.java:112)
androidx.fragment.app.FragmentManager.moveToState (FragmentManager.java:1647)
androidx.fragment.app.FragmentManager.dispatchStateChange (FragmentManager.java:3128)
androidx.fragment.app.FragmentManager.dispatchActivityCreated (FragmentManager.java:3072)
androidx.fragment.app.FragmentController.dispatchActivityCreated (FragmentController.java:251)
androidx.fragment.app.FragmentActivity.onStart (FragmentActivity.java:502)
androidx.appcompat.app.AppCompatActivity.onStart (AppCompatActivity.java:246)
android.app.Instrumentation.callActivityOnStart (Instrumentation.java:1435)
android.app.Activity.performStart (Activity.java:8140)
android.app.ActivityThread.handleStartActivity (ActivityThread.java:3546)
android.app.servertransaction.TransactionExecutor.performLifecycleSequence (TransactionExecutor.java:221)
android.app.servertransaction.TransactionExecutor.cycleToPath (TransactionExecutor.java:201)
android.app.servertransaction.TransactionExecutor.executeLifecycleState (TransactionExecutor.java:173)
android.app.servertransaction.TransactionExecutor.execute (TransactionExecutor.java:97)
android.app.ActivityThread$H.handleMessage (ActivityThread.java:2142)
android.os.Handler.dispatchMessage (Handler.java:106)
android.os.Looper.loop (Looper.java:236)
android.app.ActivityThread.main (ActivityThread.java:7864)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:620)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1011)