http-toolkit : Connection aborted even though I'm using the security config

Edit:

• It seems it's a bug in Flutter. Last answer by @Tim Perry has more details.
• I ended up using android studio network profiling for my needs.

I installed the http toolkit on my machine, and using an android in a device emulator. I followed the official http toolkit guide, created network_security_config.xml file, added it to AndroidManifest.xml, and installed the CA certificate, but I keep getting connection aborted messages for my app.

Not really sure what to do or how to even debug it. Any tips/guides will be great!

The guide: https://httptoolkit.com/docs/guides/android/#if-you-dont-have-a-custom-network-security-config

The network security file is just the same as that guide, didn't have anything before. Using flutter, but it's just java - nothing special about it.

Note: I'm using an emulator with google play so I can't use the system CA, as written in the http toolkit guide

Adding screenshots of the http toolkit app on the device.

This is due to Flutter, which ignores external certificate configuration (on Android and all systems, as far as I'm aware). https://github.com/flutter/website/issues/2472 has more details, and there are plenty of related issues like https://github.com/flutter/flutter/issues/140737 that closely match your setup here.

To resolve this in the short term, you'll need to modify the certificate trust within your Flutter app directly, since network_security_config will be ignored. In the long term, this is a Flutter bug and you should pressure them to correctly follow the system settings.