FilePicker | FilePicker for Xamarin.Forms | Form library

I'm currently working on a project in flutter where I want to store uploaded Data in Firebase Storage. This works fine but now I'm facing a problem with showing the data. I have to do a restart for showing the uploaded Data in my List.

I hope someone can help me with this issue.

i'm new to dart and i'm trying to display the file name inside the Text widget! I first took out the file's name inside the onPressed function, but later on couldn't access it in order to display it, can anyone help me out with this issue? thank in advance.

Here is my code:

Take a look at the snippet below. Having .filepicker as a direct descendant of body works as expected when shrinking window size. Here's Tailwind Play snippet.

Some of my codes is as following:

I am working with flutter. I implement filePicker(), to choose files and show them in a listView.But when I pick a new file, listview removes the previous files and shows only the new one. The code is attached below. I am glad if someone helps.

Just to give some context, there is an iOS app I'm building (in Xamarin) that requires the ability to fetch files (in an automatic way without having the user to navigate to the files and select them manually) that are stored on External Storage Devices (USB Sticks), and are connected (paired) to an iPhone/iPad.

Users connect a lighting cable to the iOS Devices, and plug their USB Sticks into this lighting cable. Here is an example of the cable that end users use to pair the USB Sticks with their iPhone/iPad, and the app then auto fetches these files from the USB Storage Devices.

The app then performs 2 functions:

1. It listens to notifications, for when a usb stick is paired with the iOS Device.
2. When it receives this notification, it then proceeds with querying the files on the USB Stick, and reads and processes the files. The app reads these files automatically and the user does not need to manually select these files

I've tried using External Accessory Framework, however that's only suitable for devices that you register with the MFi program. https://developer.apple.com/documentation/externalaccessory

Notifications Center never seems to work (the Notifications that handle when a Device gets Connected and Disconnected, the delegates never get called), and I've tried using the Microsoft Helpers.

https://docs.microsoft.com/en-us/dotnet/api/externalaccessory.eaaccessorymanager.notifications.observedidconnect?view=xamarin-ios-sdk-12

I've also tried some 3rd party libraries, but haven't found anything useful.

It doesn't look Apple has any Api Available to auto query and read the files, without having to use a DocumentPickerController. I know this is because of the App Sandbox, and I cannot directly access the Removable Storage Devices.

Now for my questions:

1. Are there any 3rd party libraries anybody can recommend, that can help achieve most of the heavy lifting for this task? I'd prefer a library that's compatible with Xamarin, however if it's a native library (Swift or Objective-C Library, Cocoapods) I'm sure there is a binding I can use on nuget.
2. Does anybody have any snippets, or documentation, or can point me in the right direction here (Please feel free to post Swift, or Objective-c solutions here if you like)? Where should I look, which Apple Framework (iOS SDK) is most suitable to deal with this situation. And to summarise, is what I'm asking for at all possible on iOS, without having to jailbreak, or get around the App Sandbox?

Update

So I've tried the solution that @Saamer suggested: Detect if USB is connected to iPhone device

Here is an example I wrote just to verify if the callback gets invoked, and the app can detect if a usb is plugged in.

We have a Xamarin Forms app that has a tab view. From one of the tabs, we open a new Content Page, which needs to have an option to select files and upload the attachment. Using Xamarin.Essentials FilePicker, we are able to pick the file and read the file contents, but after the file is read, the app auto-navigates to the home screen - the same as an app restart.

We have observed that when the filepicker is opened, OnSleep in the App.xaml.cs is called and when the file is read and the picker is dismissed, onresume in App.xaml.cs is called. It seems like this could cause the XForms App to be restarted completely.

All permissions are in place - we are targeting Android 9.0, using XForms version 4.8, X.Essentials v1.6.

Can you please help?

Relevant code:

https://pub.dev/packages/file_picker i use this package this is part of my code,Like the image I uploaded ،i trying to delete just one file from the list just there is clearCachedFiles method in this package

I am creating an app that uses FilePicker to get images from the user's gallery but I am receiving type cast errors.