Scrolling with physical mouse is super slow on Android #82973

selvam920 · 2021-05-20T02:24:08Z

When i'm using keyboard and mouse in flutter android app, i found below issue.

Keyboard Backspace is not working when Num Lock is ON
move scroll by mouse it's smooth
i'm using Logitec Keyboard and mouse fo this test.

Same scenario is working fine in windows desktop

Flutter (Channel stable, 2.2.0, on Microsoft Windows [Version 10.0.19043.928], locale en-US)
• Flutter version 2.2.0 at D:\SW\flutter_windows_2.2.0-stable\flutter
• Framework revision b227420 (5 days ago), 2021-05-14 19:12:57 -0700
• Engine revision a9d88a4d18
• Dart version 2.13.0

Related but independent issue: #132866

The text was updated successfully, but these errors were encountered:

TahaTesser · 2021-05-20T15:18:01Z

Hi @selvam920
Thanks for filing the issue.

I can reproduce the keyboard issue

Preview

`stable` & `beta`	`dev` & `master`

Reproduced the issue using the following minimal code sample

minimal code sample

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Material App',
      theme: ThemeData.dark(),
      home: Home(),
    );
  }
}

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Material App Bar'),
      ),
      body: Center(
        child: TextField(),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.add),
        onPressed: () {},
      ),
    );
  }
}

This seems to be too fixed on the dev and master

Reproduced on the following channels

`stable`	`beta`	`dev`	`master`
✅	✅	❌	❌

Check flutter doctor -v outputs for each channel below

flutter doctor -v

[✓] Flutter (Channel stable, 2.2.0, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.2.0 at C:\Users\Taha\Code\flutter_stable
    • Framework revision b22742018b (6 days ago), 2021-05-14 19:12:57 -0700
    • Engine revision a9d88a4d18
    • Dart version 2.13.0

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Taha\Code\SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = C:\Users\Taha\Code\SDK
    • Java binary at: C:\Users\Taha\Code\android-studio\jre\bin\java.exe
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31313.79
    • Windows 10 SDK version 10.0.19041.0

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).

[✓] IntelliJ IDEA Community Edition (version 2021.1)
    • IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1.1
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.56.2)
    • VS Code at C:\Users\Taha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[✓] Connected device (4 available)
    • Redmi K20 Pro (mobile) • def0ad20 • android-arm64  • Android 10 (API 29)
    • Windows (desktop)      • windows  • windows-x64    • Microsoft Windows [Version 10.0.19042.985]
    • Chrome (web)           • chrome   • web-javascript • Google Chrome 90.0.4430.212
    • Edge (web)             • edge     • web-javascript • Microsoft Edge 90.0.818.56

! Doctor found issues in 1 category.

[✓] Flutter (Channel beta, 2.2.0, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.2.0 at C:\Users\Taha\Code\flutter_beta
    • Framework revision b22742018b (6 days ago), 2021-05-14 19:12:57 -0700
    • Engine revision a9d88a4d18
    • Dart version 2.13.0

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Taha\Code\SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = C:\Users\Taha\Code\SDK
    • Java binary at: C:\Users\Taha\Code\android-studio\jre\bin\java.exe
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31313.79
    • Windows 10 SDK version 10.0.19041.0

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).

[✓] IntelliJ IDEA Community Edition (version 2021.1)
    • IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1.1
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.56.2)
    • VS Code at C:\Users\Taha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[✓] Connected device (4 available)
    • Redmi K20 Pro (mobile) • def0ad20 • android-arm64  • Android 10 (API 29)
    • Windows (desktop)      • windows  • windows-x64    • Microsoft Windows [Version 10.0.19042.985]
    • Chrome (web)           • chrome   • web-javascript • Google Chrome 90.0.4430.212
    • Edge (web)             • edge     • web-javascript • Microsoft Edge 90.0.818.56

! Doctor found issues in 1 category.

[✓] Flutter (Channel dev, 2.3.0-12.1.pre, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.3.0-12.1.pre at C:\Users\Taha\Code\flutter_dev
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision f9c825981c (2 days ago), 2021-05-18 14:07:52 -0700
    • Engine revision 26e217e6c3
    • Dart version 2.14.0 (build 2.14.0-edge.a527411e5100a0a4f48c4009087a1b988aa784af)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Taha\Code\SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = C:\Users\Taha\Code\SDK
    • Java binary at: C:\Users\Taha\Code\android-studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31313.79
    • Windows 10 SDK version 10.0.19041.0

[✓] Android Studio (version 4.2.0)
    • Android Studio at C:\Users\Taha\Code\android-studio
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)

[✓] IntelliJ IDEA Community Edition (version 2021.1)
    • IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1.1
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.56.2)
    • VS Code at C:\Users\Taha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[✓] Connected device (5 available)
    • Redmi K20 Pro (mobile)  • def0ad20 • android-arm64   • Android 10 (API 29)
    • Windows (desktop)       • windows  • windows-x64     • Microsoft Windows [Version 10.0.19042.985]
    • Windows (UWP) (desktop) • winuwp   • windows-uwp-x64 •
    • Chrome (web)            • chrome   • web-javascript  • Google Chrome 90.0.4430.212
    • Edge (web)              • edge     • web-javascript  • Microsoft Edge 90.0.818.56

• No issues found!

[✓] Flutter (Channel master, 2.3.0-13.0.pre.59, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.3.0-13.0.pre.59 at C:\Users\Taha\Code\flutter_master
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 1e35f4c0c6 (8 hours ago), 2021-05-20 03:14:01 -0400
    • Engine revision 67c537d41b
    • Dart version 2.14.0 (build 2.14.0-129.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Taha\Code\SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = C:\Users\Taha\Code\SDK
    • Java binary at: C:\Users\Taha\Code\android-studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31313.79
    • Windows 10 SDK version 10.0.19041.0

[✓] Android Studio (version 4.2.0)
    • Android Studio at C:\Users\Taha\Code\android-studio
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)

[✓] IntelliJ IDEA Community Edition (version 2021.1)
    • IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1.1
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.56.2)
    • VS Code at C:\Users\Taha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[✓] Connected device (5 available)
    • Redmi K20 Pro (mobile)  • def0ad20 • android-arm64   • Android 10 (API 29)
    • Windows (desktop)       • windows  • windows-x64     • Microsoft Windows [Version 10.0.19042.985]
    • Windows (UWP) (desktop) • winuwp   • windows-uwp-x64 •
    • Chrome (web)            • chrome   • web-javascript  • Google Chrome 90.0.4430.212
    • Edge (web)              • edge     • web-javascript  • Microsoft Edge 90.0.818.56

• No issues found!

✅ : Reproducible ❌: Not Reproducible

Can you please upgrade to the latest dev and try again
Execute the following commands to upgrade
flutter channel dev
flutter upgrade --force
flutter doctor -v

but I am not sure what's the mouse issue you're describing, please explain the mouse issue

selvam920 · 2021-05-20T18:41:24Z

The mouse issue is like scroll by mouse wheel up and down the page is not moving smooth,
It's very hard to come down in android, same app is working fine in windows desktop

TahaTesser · 2021-05-21T08:46:06Z

Hi @selvam920
Thanks for the details
The keyboard issue looks like a duplicate of #78769

I can now also reproduce the mouse

No matter how fast I scroll, scrolling is slow as a snail on Android when using a Bluetooth mouse

Reproduced the issue using the following minimal code sample

minimal code sample

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Material App',
      theme: ThemeData.dark(),
      home: Home(),
    );
  }
}

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Material App Bar'),
      ),
      body: Center(
        child: ListView.builder(
          itemCount: 20,
          itemBuilder: (BuildContext context, int index) {
            return FlutterLogo(
              size: 300,
              style: FlutterLogoStyle.horizontal,
            );
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.add),
        onPressed: () {},
      ),
    );
  }
}

Preview

Reproduced on the following channels

`channel`	`result`
`stable`	reproduced
`master`	reproduced

Check flutter doctor -v outputs for each channel below

flutter doctor -v

[✓] Flutter (Channel stable, 2.2.0, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.2.0 at C:\Users\Taha\Code\flutter_stable
    • Framework revision b22742018b (6 days ago), 2021-05-14 19:12:57 -0700
    • Engine revision a9d88a4d18
    • Dart version 2.13.0

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Taha\Code\SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = C:\Users\Taha\Code\SDK
    • Java binary at: C:\Users\Taha\Code\android-studio\jre\bin\java.exe
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31313.79
    • Windows 10 SDK version 10.0.19041.0

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).

[✓] VS Code (version 1.56.2)
    • VS Code at C:\Users\Taha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[✓] Connected device (4 available)
    • Redmi K20 Pro (mobile) • def0ad20 • android-arm64  • Android 10 (API 29)
    • Windows (desktop)      • windows  • windows-x64    • Microsoft Windows [Version 10.0.19042.985]
    • Chrome (web)           • chrome   • web-javascript • Google Chrome 90.0.4430.212
    • Edge (web)             • edge     • web-javascript • Microsoft Edge 90.0.818.56

! Doctor found issues in 1 category.

[✓] Flutter (Channel master, 2.3.0-13.0.pre.87, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.3.0-13.0.pre.87 at C:\Users\Taha\Code\flutter_master
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 4d6a925326 (4 hours ago), 2021-05-21 01:09:02 -0400
    • Engine revision 20260fb95f
    • Dart version 2.14.0 (build 2.14.0-134.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Taha\Code\SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = C:\Users\Taha\Code\SDK
    • Java binary at: C:\Users\Taha\Code\android-studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31313.79
    • Windows 10 SDK version 10.0.19041.0

[✓] Android Studio (version 4.2.0)
    • Android Studio at C:\Users\Taha\Code\android-studio
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)

[✓] VS Code (version 1.56.2)
    • VS Code at C:\Users\Taha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[✓] Connected device (5 available)
    • Redmi K20 Pro (mobile)  • def0ad20 • android-arm64   • Android 10 (API 29)
    • Windows (desktop)       • windows  • windows-x64     • Microsoft Windows [Version 10.0.19042.985]
    • Windows (UWP) (desktop) • winuwp   • windows-uwp-x64 •
    • Chrome (web)            • chrome   • web-javascript  • Google Chrome 90.0.4430.212
    • Edge (web)              • edge     • web-javascript  • Microsoft Edge 90.0.818.56

chinmaygarde · 2021-05-24T18:23:41Z

This may be a case of scroll wheel deltas not wired up correctly. Perhaps not taking into account DPI scaling? cc @gspencergoog

selvam920 · 2021-05-27T03:34:52Z

This issue not only android phone found in android tv, chromebook also

selvam920 · 2021-05-27T03:35:39Z

Tag P4 added this issue, when will it be fixed?

rxvincent · 2022-08-09T07:08:05Z

Any update? This issue is still reproduced at 3.3.0-0.1pre.

Onein · 2022-08-18T09:03:05Z

Would be great if this issue and #107400 would get some attention, because now Flutter apps are barely usable on Chrome OS devices.

selvam920 · 2022-09-25T16:30:16Z

Any update in this issue?

selvam920 · 2023-01-24T04:12:49Z

any update on this?

esDotDev · 2023-04-18T19:24:35Z

Is there some sort of workaround we could use to fix this for all lists across the app?

We could probably manually listen to the mouse wheel and drive the scroll controller ourselves, but we would need to do that manually for every list in the app. Maybe there is a more straightforward way?

reidbaker · 2023-05-02T19:54:51Z

Code that could be relevent https://github.com/flutter/engine/blob/d7375ebfc6a88ac0e56f12e61d6320694b2ef128/shell/platform/android/io/flutter/embedding/android/AndroidTouchProcessor.java#L337

bksubhuti · 2023-06-09T09:39:35Z

I recently had a report about our app not supporting proper scrolling with Bluetooth mice. Our app is multi-platform on Windows, Android, ioS, Mac, Linux. I borrowed a BT mouse for testing. I can confirm that Bluetooth mouse support works with our desktop app but with virtually the same code on android, it has the same issue reported here: very slow scroll wheel scrolling problem. I would imagine this was forgotten for Android because it was assumed that the user would use the touch features. However, people connect BT keyboards and mice to tablets all of the time. Our app also supports a desktop mode while rotated in landscape android.

We have over 2000 active devices for Android:
Android App https://play.google.com/store/apps/details?id=com.paauk.tipitakapalireader
Windows App https://apps.microsoft.com/store/detail/tipitaka-pali-reader/9MTH9TD82TGR?hl=en-us&gl=us

Furthermore, to be sure it was a flutter problem I downloaded syncfusion (flutter gallery app) and went to the pdf reader sample. This android bt mouse scroll problem also existed. It is therefore a flutter framework problem.
https://play.google.com/store/apps/details?id=com.syncfusion.flutter.examples

selvam920 · 2023-06-09T09:47:43Z

Seems no one is working with this bug, this bug was created two years ago

selvam920 · 2023-06-09T10:53:11Z

This bug did not close from when i created

bksubhuti · 2023-06-09T14:23:20Z

I think you have the power to close. and you have the power to create. The focus of the bug seemed to be diverted to keyboard. I'd close it .. then make a new bug report . If you have the minimum app, then you can explain.. plus you can reference 3 other apps. Your own, mine, and syncfusion. Furthermore, syncfusion and TPR are available on the store. Furthermore, I can confirm that scrolling does work on windows desktop. Lastly, there are 2000 android devices using our TPR app and we have stated a better reason why it is need.

Close the issue.. and then make a new one. share the link when you do.

selvam920 · 2023-06-09T15:05:30Z

I will close this bug now, you can create new bug with bug details

esDotDev · 2023-06-09T16:21:31Z

I'd keep this open, it has 15 upvotes which is a core metric the Flutter team uses to determine priority. I know this issue is already on the Flutter teams radar as well. If anything just update the OP to be more clear/specific

gspencergoog · 2023-06-09T16:27:59Z

We do look at comments on existing bugs, and filing a new identical bug will not get a different prioritization. I'm sorry this hasn't risen to the top of our queue: there are a lot of other issues to attend to.

I'm reopening this because it has a lot of context that would be lost in a new issue (including recent comments).

selvam920 · 2023-06-09T16:36:27Z

Is there any use to reopen this bug? Bcoz this bug we waited almost 2 years

gspencergoog · 2023-06-09T16:50:46Z

Yes, in includes investigative work that we won't have to do again when we get to fixing it. It has a reproduction steps and verification, as well as upvotes that will help it get to the top of the queue. There's plenty of reason to keep it open.

bksubhuti · 2023-06-10T09:46:42Z

okay.. looks like we got some attention. I hope my information helped. Furthermore, Flutter was quite new then. I would imagine this is one of the issues they would like to solve at this point and tablet as a computer is more common now too. Desktops were in beta back then. I hope we can test a fix for this soon.

bksubhuti · 2023-08-10T03:22:37Z

you would need to test and let me know.. However, we did add keyboard scrolling. You can see if that works on android.
pageup and pagedown and updown arrows work on desktop.

selvam920 · 2023-08-10T04:44:35Z

Are you talking about android or desktop?

bksubhuti · 2023-08-10T05:29:38Z

You are talking about android.. therefore I'm also saying.. hey you can try testing. I don't have the ability to test without asking for equipment from another monk. If you report back your findings with your own equipment based on android.

reidbaker · 2023-08-15T14:21:48Z

Update I found a solution to this and am working on the unit tests now. It did however expose that flutter takes a few seconds longer than android to register mouse input. I may need to file a different issue to track that work.

Fixes flutter/flutter#82973 Mouse scroll wheel support for android. I chose to not cache the vertical and horizontal scale factors that come from view configuration. The primary reason is that in the current code path context is only used when the user scrolls which was the unimplemented feature. This smaller blast radius I decided was worth the additional calls. A secondary reason is that when the scale factors are changed is not a well documented path nor is there a lifecycle callback to listen to. Scroll factor is cached on api 25 and below because that more closely mirrors the behavior I see in pre 25 versions of android scroll view. Note flutter takes longer to "see" a mouse that then scrolls than android Fixes #flutter/flutter/82973 Todo list prior to merge ## Links * Some pre api 26 scroll factor code - https://cs.android.com/android/platform/superproject/main/+/main:frameworks/base/core/java/android/view/View.java?q=function:getVerticalScrollFactor%20filepath:android%2Fview%2FView.java&ss=android%2Fplatform%2Fsuperproject%2Fmain - https://cs.android.com/android/_/android/platform/frameworks/base/+/main:core/java/android/widget/ScrollView.java;l=930;drc=2fe301db7555bccf53e465436d4cb7442c803df3;bpv=0;bpt=0 * Post api 26 scroll factor code - https://cs.android.com/android/_/android/platform/frameworks/base/+/main:core/java/android/widget/ScrollView.java;l=361;drc=406e0f655387f27dda874c2b975fb0ddbd61aa13;bpv=0;bpt=0 - https://developer.android.com/reference/android/view/ViewConfiguration#getScaledVerticalScrollFactor()

selvam920 · 2023-08-23T11:33:59Z

@reidbaker Wow, it's great working on master channel

bksubhuti · 2023-08-23T11:39:57Z

That is great.. We have an open issue on this. If you can push a note when it goes to the main channel.

Fixes flutter/flutter#82973 Mouse scroll wheel support for android. I chose to not cache the vertical and horizontal scale factors that come from view configuration. The primary reason is that in the current code path context is only used when the user scrolls which was the unimplemented feature. This smaller blast radius I decided was worth the additional calls. A secondary reason is that when the scale factors are changed is not a well documented path nor is there a lifecycle callback to listen to. Scroll factor is cached on api 25 and below because that more closely mirrors the behavior I see in pre 25 versions of android scroll view. Note flutter takes longer to "see" a mouse that then scrolls than android Fixes #flutter/flutter/82973 Todo list prior to merge ## Links * Some pre api 26 scroll factor code - https://cs.android.com/android/platform/superproject/main/+/main:frameworks/base/core/java/android/view/View.java?q=function:getVerticalScrollFactor%20filepath:android%2Fview%2FView.java&ss=android%2Fplatform%2Fsuperproject%2Fmain - https://cs.android.com/android/_/android/platform/frameworks/base/+/main:core/java/android/widget/ScrollView.java;l=930;drc=2fe301db7555bccf53e465436d4cb7442c803df3;bpv=0;bpt=0 * Post api 26 scroll factor code - https://cs.android.com/android/_/android/platform/frameworks/base/+/main:core/java/android/widget/ScrollView.java;l=361;drc=406e0f655387f27dda874c2b975fb0ddbd61aa13;bpv=0;bpt=0 - https://developer.android.com/reference/android/view/ViewConfiguration#getScaledVerticalScrollFactor()

github-actions · 2023-09-06T12:00:45Z

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

TahaTesser added the in triage Presently being triaged by the triage team label May 20, 2021

TahaTesser added the waiting for customer response The Flutter team cannot make further progress on this issue until the original reporter responds label May 20, 2021

no-response bot removed the waiting for customer response The Flutter team cannot make further progress on this issue until the original reporter responds label May 20, 2021

TahaTesser changed the title ~~Flutter android keyboard & mouse issue~~ Scrolling with physical mouse is super slow on Android May 21, 2021

chinmaygarde added the P2 Important issues not at the top of the work list label May 24, 2021

darshankawar mentioned this issue Feb 28, 2022

[Android] Wireless mouse scroll very slow #99219

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esDotDev mentioned this issue May 3, 2023

Mouse Wheel scrolls very slowly on Android w/ Keyboard gskinnerTeam/flutter-wonderous-app#80

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selvam920 closed this as completed Jun 9, 2023

gspencergoog reopened this Jun 9, 2023

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flutter-triage-bot bot added multiteam-retriage-candidate team-android Owned by Android platform team triaged-android Triaged by Android platform team labels Jul 8, 2023

johnmccutchan self-assigned this Jul 31, 2023

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esDotDev mentioned this issue Aug 10, 2023

PointerScrollEvent is not consistent between platforms (Desktop/Web) #76913

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Piinks mentioned this issue Aug 21, 2023

i82973 scroll mouse wheel support flutter/engine#44724

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auto-submit bot closed this as completed in flutter/engine#44724 Aug 22, 2023

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Scrolling with physical mouse is super slow on Android #82973

Scrolling with physical mouse is super slow on Android #82973

selvam920 commented May 20, 2021 •

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github-actions bot commented Sep 6, 2023

Scrolling with physical mouse is super slow on Android #82973

Scrolling with physical mouse is super slow on Android #82973

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selvam920 commented May 20, 2021 • edited by reidbaker Loading

TahaTesser commented May 20, 2021 • edited Loading

I can reproduce the keyboard issue

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but I am not sure what's the mouse issue you're describing, please explain the mouse issue

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selvam920 commented May 20, 2021 •

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