[dynamic_color] Add tone-based colors to color scheme

[hasali19]

Description

Adds the new tone-based colors from Flutter 3.22 to the color scheme.

On API >= 34, the color values are retrieved directly from the Android OS.

On API >= 31, the existing core palette will continue to be used, with the mappings taken from https://github.com/material-components/material-components-android/blob/master/docs/theming/Color.md.

Issues

Fixes #574, #582

Checklist

• I've reviewed the contribution guide.
• I've updated the package CHANGELOG.md

[Henry-Hiles]

I'm trying to use this, but I get this error: When a TonalPalette is created with fromList, tone must be one of [0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, 99, 100]

[hasali19]

Interesting...I don't think I've changed anything related to that. Does the latest main branch work fine for you?

[Henry-Hiles]

Interesting...I don't think I've changed anything related to that. Does the latest main branch work fine for you?

Well, from pub it doesn't have the correct colours, but no errors. I switched the pubspec to use this fork, and boom: error. I'll try main asap.

[Henry-Hiles]

Interesting...I don't think I've changed anything related to that. Does the latest main branch work fine for you?

Latest main works fine. Just this branch :)

[Henry-Hiles]

I'm using DynamicColorBuilder ofc.

[hasali19]

Which flutter version are you using?

[Henry-Hiles]

quadradical@quadraticpc ~/D/C/qlib (master)> flutter --version
Flutter 3.22.2 • channel stable • https://github.com/flutter/flutter.git
Framework • revision nixpkgs000 () • 1970-01-01 00:00:00
Engine • revision edd8546116
Tools • Dart 3.4.3 • DevTools 2.34.3

[hasali19]

Ok, I think I see the problem. Support for arbitrary colour tones were added in material_color_utilities 0.11.0, but stable flutter depends on 0.8.0. I just realised I was using the beta channel, which is why I didn't run into it.

I think the solution will be to sidestep material_color_utilities and try to get the colours from the native side for the API < 34 case as well.

[Henry-Hiles]

Oh, I see, thanks!

[hasali19]

I've taken a different approach of implementing logic to "guess" tones that are missing from the common tones list, based on the implementation in material_color_utilities. This will be needed until flutter supports the new version.

@Henry-Hiles Can you confirm if this works for you now?

[Henry-Hiles]

Sure, I'll test right now!

[Henry-Hiles]

While this no longer has an error, it still has the same issues as without this PR (very similar colors so nothing looks correct)

[Henry-Hiles]

[Henry-Hiles]

As you can see, the navbar and background are the same, which isn't normal.

[hasali19]

I can't seem to reproduce that. Do you have an example repo/code you can share?

[Henry-Hiles]

I can't seem to reproduce that. Do you have an example repo/code you can share?

Hmm it happened when I upgraded to 3.22.2, I'll see if I can make a test repo.

[Henry-Hiles]

Nevermind deleting pub cache and re-getting fixed it! Thank you for this!

[resucutie]

After building my application using it, the primary color isn't accurate

[hasali19]

Which android version are you using?

[resucutie]

Android 14. I could give the project to you try it out seeing what's wrong

[hasali19]

On Android 14, this should be using the primary colour that is provided directly by the system.

Could you share your flutter version, debug logs and a sample project if possible.

[JunioJsv]

There's something wrong with the implementation. I just tested it in my project, and the colors don't match those of the system, which is predominantly green. However, in the app, the predominant color is dark blue. I'm using Android 14 and Flutter 3.22.0.

[JunioJsv]

Here's the link to the project where I ran the test: https://github.com/JunioJsv/minimum-flutter

[hasali19]

I'm not able to reproduce the issue on my device.

Could you share the debug logs when you run the app. In particular, do you see a line similar to:

I/flutter (18079): dynamic_color: Color scheme detected.

[hasali19]

It seems this may be a common issue on Samsung devices, affecting the official Android material library as well - material-components/material-components-android#3924. Samsung reports incorrect values for the new colours added in Android 14.

Do you see dynamic colours working correctly in other apps, e.g. Google apps?

Given this is a Samsung specific issue, not really sure what we can do here.

[JunioJsv]

It seems this may be a common issue on Samsung devices, affecting the official Android material library as well - material-components/material-components-android#3924. Samsung reports incorrect values for the new colours added in Android 14.

Do you see dynamic colours working correctly in other apps, e.g. Google apps?

Given this is a Samsung specific issue, not really sure what we can do here.

Indeed, the Google apps are also displaying the wrong tone, dark blue, and my device is a Samsung A54.

[resucutie]

I've decided to finally publish a "just build it" branch of my project: https://github.com/resucutie/localbooru/tree/dynamic-colors-pr-fix-test

@hasali19 feel free to build and test it

[hasali19]

@resucutie Thanks, I'll take a look.

Could you also share your flutter version please?

[hasali19]

From what I can see this is working as expected; Android's quick settings tiles use a slightly different shade of the primary colour.

You can see here that the shadeActive colour (used by the Android system for the quick settings tiles) uses tone 90 of the primary colour, while the material library defines primary in the colour scheme as tone 40 in light mode and 80 in dark mode.

[resucutie]

Welp, what about in comparasion to other apps? It looks odd, or I guess it is the consensus here, like if it is using the wrong color shade, but I am not sure

[hasali19]

Do you mean you are seeing different colours compared to other apps using the same dynamic colour scheme?

This implementation should be using the same colours as those used by the official native material library. If this is not the case, please share a repro.

[resucutie]

I've (finally) tested it and apparently it indeed take the correct colors. It is a bit odd that it looks different on an emulator

PR is good I think

[wildsylvan]

in our case, after activating dynamic colors (using this commit):

primary container e secondary container became the same color!

---

look at the cards (list a/b and the new list fab. they should be different colors but with dynamic colors they become the same)

without dynamic colors (correct)

with dynamic colors (wrong)

[hasali19]

Please can you share your flutter and android versions, device information, debug logs and a link to a code repo if possible.

[wildsylvan]

thanks for the quick reply! here:

[√] Flutter (Channel beta, 3.24.0-0.2.pre, on Microsoft Windows [Version 10.0.22631.3880], locale en-US)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[√] Chrome - develop for the web
[X] Visual Studio - develop Windows apps
    X Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components
[√] Android Studio (version 2024.1)
[√] VS Code (version 1.92.1)
[√] Connected device (3 available)
[√] Network resources

testing on a real phone, oneplus 8t with android 14

---

i can provide a repro next week... it's very vanilla use of material components tho, not many customizations

[wildsylvan]

this is the oneplus color settings:

[wildsylvan]

ok these impact how colors are shown in the app:

but the difference between primary container e secondary container remains basically non-existent

[wildsylvan]

@hasali19 what would be the best way to ignore completely oneplus color presets, just get the "main accent color" from android and utilize that color to build a correct material 3 color palette?

[hasali19]

Thanks for the info. Given that you are using Android 14 where the colours are retrieved directly from the system without any conversion, it is likely OnePlus is simply reporting both colours as the same.

One thing you could try is to force use of the fallback method used for older versions of Android, e.g:

final corePalette = await DynamicColorPlugin.getCorePalette();
final lightDynamic = corePalette?.toColorScheme(brightness: Brightness.light);
final darkDynamic = corePalette?.toColorScheme(brightness: Brightness.dark);

If you just want a specific "accent" colour, you can pick one from the fields on the colour schemes provided by DynamicColorBuilder.

[wildsylvan]

update

---

final corePalette = await DynamicColorPlugin.getCorePalette();
final lightDynamic = corePalette?.toColorScheme(brightness: Brightness.light);
final darkDynamic = corePalette?.toColorScheme(brightness: Brightness.dark);

doesn't fix the issue

---

my colleague tested with his Pixel 7 Pro (and also inside an emulator) and he has the same issue

the issue seems to be present only in light mode tho (and our theme settings don't have any special settings for only one of the modes):

wrong in light mode

correct in dark mode

[wildsylvan]

this is the card (the one with the text Test):

this is the fab:

and this is the theme config:

[hasali19]

Although it's subtle, the colours in your screenshot do appear to be slightly different. I'm also able to reproduce very similar looking colours in light mode when running in an emulator.

[wildsylvan]

yeah i was just about to write it! they are a little different... so it's more of a general issue with the way the m3 color generator works?

[wildsylvan]

with a green wallpaper the difference is less subtle too...

[hasali19]

Right, I guess it's just an artifact of whatever algorithm Android uses to pick the system colours.

[wildsylvan]

well to be fair the material theme builder shows it as well with the blues (tho the difference is a little more visible):

while with the greens the difference is much less subtle:

@guidezpl is it supposed to be that different between hues?