Issue 10  30 January 2023

r/FlutterDev

I made a companion app for my headphones with Flutter

I was very annoyed how big, slow, and bloated official app for my Huawei FreeBuds 4i was 🤬, so I made my own 🌈I reverse engineered the protocol that the buds use 👨‍💻 and made an app in Flutter 🐦Here's how Flutter did for me in this case:THe beggining was hard. Very hard. I managed to make a quick demo using flutter_bluetooth_serial plugin, but it was very alpha-stage, and didn't have any auto-updating callbacks. Meaning, i had to have Stream.periodic that checked connected devices every 10ms.So I made my own - that took me quite a time, since managing multiple streams from android-blocking-api, to PlatformChannels, then to Dart streams - was hard. Coroutines helped a bit, but Dart way of async stuff is just sooooo damn better 😭So if anyone needed bluetooth classic: https://github.com/TheLastGimbus/the_last_bluetooth (it lacks documentation yet, but does the job well already 👍)Once i had that working, rest was just a pleasure. Dart's OOP allowed me to very easily write some abstract interfaces for all headphone features, test them on my desktop with fake class that just spits made-up values, and then implement it with real headphonesThanks to this, i could publish a web demo app with just few lines: https://freebuddy-web-demo.netlify.app/OOP sometimes sucks, but Dart/Flutter does it really well 👍👍Anyway, once i had everything into Streams, UI was a pleasure too. With new updates to Material3, i didn't have to look up any libraries - built in buttons, switches etc are already ✨beautiful✨

Flutter App Architecture Diagram Best Practices

Hello Flutter Developers!Our team is creating a schematic (i.e. "Architecture Diagram") of our Flutter App design using Figma's "New FigJam File" tool. This is a visual representation that maps out the physical implementation for components of a software system. It shows the structure, associations, limitations, and boundaries between each element. We want to make it visible to the public and easy to read for folks unfamiliar with our use case. As such we want to apply shapes, colors, and other design choices that match with any industry standards and best practices.Are there common industry standards and best practices for building Flutter App schematics?If so, please share an example or link we can use to implement these best practices.Thank you!Sincerely,Team WEquil.App

How can i experiment with flutter 3D?

In flutter forward, flutter team showcased a demo of 3d flutter dash. But I could not find any resources to experiment with it. Like how i can use showcased widget or just a link to the demo app. If anyone can share any resource related to this please do share.

r/flutterhelp

Large project: intellisense and auto imports don’t work.

I’m not sure whether this question belongs here, apologies if it does not, but I wondered whether anyone has encountered a similar issue before.I’ve recently begun working on a very large project at my company and I have noticed that the Dart autocomplete function and general intellisense (I’m using VSCode) just craps out. Autocomplete doesn’t suggest imports relevant to the project or classdespite those imports existing in other files. Similarly, Dart code server takes a long time (around 5ish seconds sometimes) to process what’s being written to determine whether it’s valid.Has anyone experienced something similar? Is there some magic setting that I could change that might improve the performance? Or anything to look out for with regards to intellisense autocomplete/autoimport not working?

Streaming camera from robot to flutter

Hello, I have a robot with a Nvidia Jetson Nano and an Intel RealSense camera. I use ROS2 for this. I can convert the camera topics into e.g. OpenCV frames. Now my question is how and with which protocol can I display this camera data fluently in a Flutter app. I tried StreamBuilder once (with roslibdart), but the picture "blinked" and it wasn't smooth either, since rosbridge is over TCP. Of course, UDP would be better. Does anyone have an idea how I could solve this

r/dartlang

DI Container / IoC Container for Dart

Hi, guys! I have stacked in looking for available packages DI Container for dart. I came to dart from JS/TS/Nodejs and this technologies have DI Container like inversify which really good in my opinion, also nestjs is using a lot this pattern in its base. So I want to find similar dependency in dart but I failed. Maybe some of you know this packages and you will share with me, or you know some titles about this pattern with DI container in dart (container is important in this pattern).