Uses UIThread on Android when using channel

[GauteHaugen]

Looks like after flutter 1.6 you need to jump back to the UIThread before sending messages over a channel
More info here: https://flutter.dev/docs/development/platform-integration/platform-channels#jumping-to-the-ui-thread-in-android

Since I don't own any ios devices, I can't test if the changes made to flutter 1.6 broke this plugin for ios as well. But since there is a chapter for making the switch to the main thread on ios as well, I would assume so. More info here: https://flutter.dev/docs/development/platform-integration/platform-channels#jumping-to-the-main-thread-in-ios

[GauteHaugen]

If you want I could write the code for ios for switching to the main thread, but I would have no way of testing if it works before or after my changes

[matteocrippa]

@GauteHaugen for iOS I can test on my side, strange the forced that to run in the UI thread, btw I will have a look into that.

Dunno if not safer create a separate branch for this breaking change, test a bit and then merge into master if all fine

[GauteHaugen]

As far as I understood this is the way to do it after flutter 1.6. So if people use flutter 1.6+ it will not work without forcing it back onto the main thread (The app will start and everything seems normal, but no response is made when scanning a nfc tag). How this would affect people that use flutter versions before 1.6, is unknown for me. But I could download some previous versions of flutter and test it on android to see if it would break the program.

[alex-deutsch]

closing it, fix was also part of my Pull Request