RealmHelper | Realm helper by Kotlin | Android library

I am seeing a number of crashes on Crashlytics but unable to reproduce the the crash which is happening on app launch. Does anyone know how to reproduce the below crash. I have tried all the answers on Github and stackoverflow and no one has mentioned about reproducing this specific crash. So if i do have a fix there is no way to test it except putting the fix in production and then assuming Crashlytics wont show crashes.

Please help.

Error:

Fatal error: 'try!' expression unexpectedly raised an error: Error Domain=io.realm Code=2 "Unable to open a realm at path '/var/mobile/Containers/Data/Application/03BA7C37-9852-4A01-8EF6-949E308EADCD/Documents/default.realm.lock': open() failed: Operation not permitted." UserInfo={Error Code=2, NSFilePath=/var/mobile/Containers/Data/Application/03BA7C37-9852-4A01-8EF6-949E308EADCD/Documents/default.realm.lock,

calling code

I have an activity which contains a fragment that contains a tab layout alongside a viewpager. Each viewpager has a fragment and each fragment has a recyclerview.

To summarise: mainactivity (contains) -> mainFragment (contains) -> viewpager (contains) -> fragments (contains) -> recyclerview.

When the app launch, the recyclerview scrolls smoothly, no lags or whatsoever. And even when I do a GPU profiling, the GPU bars generated on app launch are acceptable.

The issue only happens when I go to another activity and go back to the viewpager (onResume) that the recyclerview becomes lag.

To show you the issue at hand, here are some pictures on the GPU profiling:

The image on the left is the initial app launch GPU profile when scrolled.

The image in the right is the app GPU profile after invoking onResume 10 times and scrolled.

As you can see, the adapter is not loading any images or doing any CPU/GPU consuming task in the UI thread - the adapter only loads an empty list hence not doing any expensive tasks.

the onResume code for all the fragments is this:

I want to delete a specific record from Realm database and also from cardview recyclerview on button click when I click on delete button in (ADAPTER CLASS) it gives me error, I don't know how to solve it. I want that when I click on delete button the data has deleted from realm database and recyclerview(cardview) as well but I am not succeeded in this.

I am new in realm database.

RealmHelper Class:

Can't figure out how to delete specific item from recycler view and realm database. I figured out to delete item from recycler view so when I when click on button delete, it deletes that item, but can't figure out how to delete from datebase as well becouse of course when I restart app, same date appears becouse it's not deleted from database.

listitem.xml:

I'm working on an iOS app that uses a Realm database. In my AppDelegate, I define a Realm result set like this:

I would like to use this methods I used on a kotlin file in a java file, unfortuanetly I don't know how to do it in java. Could someone help me please?

Kotlin code to change to Java:

I'm trying to hide the Toolbar so I can put my own one in but the toolbar still shows, could someone help please. The theme @style/AppTheme.NoActionBar works in other activities.

Manifest:

I am using realm database to maintain product log in my app.! my app getting a crash while configuring realm builder.! I used the following code to configure the realm builder.

I'm populating a realm database table with information from a Cloud Firestore collection. On the first load, the application opens and saves the information but does not display it until I close and open the application.

I need the information to be displayed after it's been written to the realm database. ie without having to close and open the app. I tried doing this by putting them in methods and in order in the onCreate method.

So after it has written all the information to the realm database I want the recyclerview to populate but I don't know how to do that, please help?

ScreenShots

First launch(left) and second launch(right)

OnCreate: