AndroidPermissions | Android M was added to check Permission | Authorization library

Android implemented a new storage policy in Android 10 (API level 29) that is being enforced in Android 11 (API level 30) called Scoped Storage. By default it prevents an app from accessing the general file system, in your case the Downloads folder.

I suggest a long term solution of re-architecting your system to not require information from the Downloads folder since there might be sensitive information there that most apps should have no business accessing. If you do need access, however, there is a new permission you have to use: MANAGE_EXTERNAL_STORAGE.

For Android 10, a flag was added to cordova-plugin-file recently to ensure the OS uses the old file policy, so your code should work if you're using the latest plugin version. If you need to install it directly from the repo:

At the place where you are calling check permission for ACCESS_BACKGROUND_LOCATION, also check for ACCESS_FINE_LOCATION and if any of them is not found, call your requestPermissions method. This should help.

It's just a string so pass the permission class that you want into it.

Fixed it by adding

The issue solved by adding permission to < config-file > tag.

inside config.xml:

That's good, solid code (especially if you're not experienced in Kotlin): good use of types, and the getOrPut() function.  (The only tweak I'd suggest would be to change hashMapOf() to mutableMapOf(), since you don't care about the exact type of map.  You could also replace the add() call with += operator, though that's more disputable.)

However, there's a shorter alternative in a more functional style:

All I had to do was: In dependencies, instead of "@ionic-native/media-capture": "^4.12.0" I wrote "@ionic-native/media-capture": "^5.0.0-beta.14". After that I typed npm update in CLI. And in my page component I used import { MediaCapture, MediaFile, CaptureError, CaptureImageOptions } from '@ionic-native/media-capture/ngx';. The important part here is /ngx as described in this link. Well I had to do this for AndroidPermissions, Diagnostic, Media and File. After that issue was solved. Hope it will help others.

I managed to solve this - the problem was the device itself. I tested on another phone and my canvas code worked perfectly. Uninstalling my app and reinstalling it did not resolve the issue, but a factory reset did. The device in question is an Honor 10 Lite. Not sure how this could have happened, maybe the device's WebView became corrupt somehow?

If your data relies on other async data then you just have to keep nesting it until you slowly go insane :P

Remove the code from your constructor and then put it all in the ionViewDidEnter() with nesting: