java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.String java.lang.CharSequence.toString()' on a null object reference at de.bps.asist.module.canteen.CanteenSettingsFragment.onSharedPreferenceChanged(CanteenSettingsFragment.java:94) at android.app.SharedPreferencesImpl$EditorImpl.notifyListeners(SharedPreferencesImpl.java:497) at android.app.SharedPreferencesImpl$EditorImpl.apply(SharedPreferencesImpl.java:397) at android.preference.Preference.tryCommit(Preference.java:1418) at android.preference.Preference.persistString(Preference.java:1451) at android.preference.ListPreference.setValue(ListPreference.java:148) at android.preference.ListPreference.onDialogClosed(ListPreference.java:283) at android.preference.DialogPreference.onDismiss(DialogPreference.java:395) at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1352) at android.os.Handler.dispatchMessage(Handler.java:102) at androidx.test.espresso.base.Interrogator.a(Interrogator.java:19) at androidx.test.espresso.base.UiControllerImpl.a(UiControllerImpl.java:166) at androidx.test.espresso.base.UiControllerImpl.a(UiControllerImpl.java:158) at androidx.test.espresso.base.UiControllerImpl.a(UiControllerImpl.java:138) at androidx.test.espresso.action.Tap$1.a(Tap.java:6) at androidx.test.espresso.action.GeneralClickAction.perform(GeneralClickAction.java:22) at androidx.test.espresso.ViewInteraction$SingleExecutionViewAction.perform(ViewInteraction.java:9) at androidx.test.espresso.ViewInteraction.a(ViewInteraction.java:79) at androidx.test.espresso.ViewInteraction.a(ViewInteraction.java:96) at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.java:3) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6121) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)```
