Crash when saving is cancelled #58
Description
The library throws a Null Pointer exception if the save process is interrupted(rather than saving the file, press the back button).
Exception Recieved
java.lang.RuntimeException: Unable to resume activity {--projectActivity--}: java.lang.NullPointerException: uri at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3672) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3712) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1679) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6626) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811) Caused by: java.lang.NullPointerException: uri at com.android.internal.util.Preconditions.checkNotNull(Preconditions.java:128) at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1227) at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:1100) at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:1054) at com.gkemon.XMLtoPDF.PdfGenerator$Builder.writePDFOnSavedBlankPDFFile(PdfGenerator.java:445) at com.gkemon.XMLtoPDF.PdfGenerator$Builder.lambda$print$0$com-gkemon-XMLtoPDF-PdfGenerator$Builder(PdfGenerator.java:422) at com.gkemon.XMLtoPDF.PdfGenerator$Builder$$ExternalSyntheticLambda1.onBlankPDFCreatedInSharedStorage(Unknown Source:4) at com.gkemon.XMLtoPDF.PdfGenerator$XmlToPDFLifecycleObserver.lambda$onCreate$0$com-gkemon-XMLtoPDF-PdfGenerator$XmlToPDFLifecycleObserver(PdfGenerator.java:696) at com.gkemon.XMLtoPDF.PdfGenerator$XmlToPDFLifecycleObserver$$ExternalSyntheticLambda0.onActivityResult(Unknown Source:4) at androidx.activity.result.ActivityResultRegistry$1.onStateChanged(ActivityResultRegistry.java:149) at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.java:360) at androidx.lifecycle.LifecycleRegistry.forwardPass(LifecycleRegistry.java:271) at androidx.lifecycle.LifecycleRegistry.sync(LifecycleRegistry.java:313) at androidx.lifecycle.LifecycleRegistry.moveToState(LifecycleRegistry.java:151) at androidx.lifecycle.LifecycleRegistry.handleLifecycleEvent(LifecycleRegistry.java:134) at androidx.lifecycle.ReportFragment.dispatch(ReportFragment.java:68) at androidx.lifecycle.ReportFragment.dispatch(ReportFragment.java:144) at androidx.lifecycle.ReportFragment.onStart(ReportFragment.java:109) at android.app.Fragment.performStart(Fragment.java:2534) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1315) at android.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1557) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1618) at android.app.FragmentManagerImpl.dispatchMoveToState(FragmentManager.java:3027) at android.app.FragmentManagerImpl.dispatchStart(FragmentManager.java:2984) at android.app.FragmentController.dispatchStart(FragmentController.java:189) at android.app.Activity.performStart(Activity.java:7058) at android.app.Activity.performRestart(Activity.java:7127) at android.app.Activity.performResume(Activity.java:7132) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3647) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3712) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1679) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6626) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)