First time using Rinf

[Vjze]

First, I'd like to thank the maintainers for their hard work. I'm new to Rust (including Flutter). Now let me briefly talk about my feelings after using Rinf for the first time. Rinf is simple to use and easy to get started, and the conversion can be completed in just a few lines of code. However, I found that the CPU usage was very high, even just running the example files. So, I want to ask, can I send the Vec<Vec> or Vec type obtained in Rust to flutter? If possible, how should I write the message? Hope someone can guide me, thanks.

[temeddix]

Hi @Vjze, thanks for your feedback :)

The CPU usage being high is because of the Mandelbrot fractal example included in the template, which is indeed a heavy task. If you remove stream_mandeobrot()(IIRC), cpu usage will go down to the base level.

For the idea of Vec<Vec<_>>, may I ask you if you are talking about sending multiple blobs at a single response or signal?

[temeddix]

Now I think we should disable Mandelbrot from the default template

[temeddix]

#190

[Vjze]

What I need to do now is to send the result of type Vec<Vec or Vec obtained in Rust to flutter, just one result. I want to know what needs to be written in the output type in message.proto.English is not my native language, so some sentences may not be expressed properly, please forgive me.

[temeddix]

@Vjze Oh I see

Do you mean something like this?: https://stackoverflow.com/questions/36715078/google-protobuffer-how-to-define-list-of-lists-in-proto-file

[Vjze]

Yes, thank you very much for your patient guidance. My demo project can already run normally and transfer data. thank you very much.

20231022_171828.mp4

[temeddix]

Wow, that looks interesting. Good luck with your project! If this framework benefits you in the future, please let other developers know Rinf as well 👍

[Vjze]

I had some problems when generating an Android application. I don't know if it has anything to do with Rinf. If I debug and run it directly, the program can call the Rust query code and then run normally and display. B

ut if I release the generated apk and then run it, nothing happens when I click on the query. I think the rust code is not executed. My Rust code mainly performs mssql queries and then returns data to flutter.

[temeddix]

bandicam.2023-10-24.16-30-36-948.mp4

Hmm, on my computer Rinf and its example are working as expected, even if I drag and drop the release version of the .apk file to the emulator manually. Could you try flutter clean and cargo clean, and rebuild the app again?

Also, did you check the network permission field for Android apps, as you're dealing with SQL queries?
https://docs.flutter.dev/data-and-backend/networking

[temeddix]

This should be fixed by #207 (Version 4.15.1), so if you try the latest main branch's example, it should work :)

Thanks for your patience, and please tell me if any of the problem reamins.

EDIT: Further improvements were made in 4.15.2

[Vjze]

May I ask, what is the reason for this?

[temeddix]

Hmm, that error is something I'm not familiar with. I've never seen that before.

Would you try fixing the Flutter cache, as mentioned here?:

• https://stackoverflow.com/questions/55399209/update-flutter-dependencies-in-pub-cache

[Vjze]

It compiles normally, but this error appears when running. What is the reason?

[temeddix]

I'm not sure why that error is happening, but I'll try to inspect later when I have time. I cannot reproduce this error and it compiles to Android fine on my Windows and macOS :\

[imxood]

@temeddix The PC runs on the Windows 11 operating system.

Create a Flutter template project.

rinf template

rinf message

When using 'flutter run -v', it defaults to display on the Android emulator.

However, using the latest code,

git clone https://github.com/cunarist/rinf.git

cd rinf/flutter_ffi_plugin/example

rinf message

flutter run -v

runs successfully.

Is there any missing configuration in the code generated by 'rinf template'?

[imxood]

Following the instructions here, https://stackoverflow.com/questions/55399209/update-flutter-dependencies-in-pub-cache

performing the steps didn't yield any effect; the same error persists.

[imxood]

flutter run -d windows this is ok

[temeddix]

I'll inspect this problem as soon as I get free, thank you for the detailed report :)