Flutter: open_file package does nothing - flutter

Question

I'm developing a Flutter application. I've been using the open_file package for quite a while now to open files, but suddenly it doesn't work. I tried altering the code to print out the result of envokeMethod, and this is what shows up in the terminal.
I/flutter (13494): Result: {"type":-3,"message":"Permission denied: android.Manifest.permission.MANAGE_EXTERNAL_STORAGE"}
I tried adding the permission MANAGE_EXTERNAL_STORAGE in AndroidManifest.xml but it didn't work. I checked my app permission, it has access to file and media.
Any help would be greatly appreciated. Thanks.

Answer 1

After looking for some stuffs, I finally found the problem. When I checked my app's permission, for some reason there are only 2 options in File and Media section, which are Media only and Deny. For some reason file isn't included there, so I looked it up and found out that you need a specific permission starting from Android 11, which is called manageExternalStorage. So I had to ask for storage permission, then manageExternalStorage permission, and only then I could see a third option in the File and Media permission, which is All Files. After applying and asking for that permission, open_file works perfectly fine. BUT, it turns out that ManageExternalPermission is a pretty sensitive permission, which in my case, my application doesn't fulfill the requirement to ask for that permission, and was rejected due to that when I published it to Play Store. So I ended up forking the open_file package, changed it so that it doesn't require ManageExternalStorage permission, and it all works fine after that.