flutter_local_notifications_linux is pulled in on Android

[emersion]

1. Run flutter build apk --analyze-size --target-platform android-arm64
2. See package:flutter_local_notifications_linux and package:dbus included in the output

This increases app size.

Example:

✓  Built build/app/outputs/flutter-apk/app-release.apk (7.0MB).
▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
app-release.apk (total compressed)                                          7 MB
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  res/
    layout                                                                  8 KB
    drawable-xhdpi-v4                                                       2 KB
    layout-v17                                                              7 KB
    drawable-mdpi-v4                                                        2 KB
    drawable-anydpi-v21                                                     1 KB
    drawable                                                                1 KB
    drawable-xxxhdpi-v4                                                     2 KB
    mipmap-hdpi-v4                                                          3 KB
    drawable-xxhdpi-v4                                                      1 KB
    mipmap-mdpi-v4                                                          2 KB
    drawable-hdpi-v4                                                        2 KB
    layout-v21                                                              2 KB
    mipmap-xxhdpi-v4                                                        7 KB
    mipmap-xhdpi-v4                                                         4 KB
    mipmap-xxxhdpi-v4                                                      10 KB
  META-INF/
    MANIFEST.MF                                                             4 KB
    kotlinx-coroutines-core.kotlin_module                                   1 KB
    CERT.SF                                                                 4 KB
    kotlin-stdlib.kotlin_module                                             3 KB
    CERT.RSA                                                                2 KB
  kotlin/
    reflect                                                                 1 KB
    kotlin.kotlin_builtins                                                  4 KB
    collections                                                             1 KB
  assets/
    org                                                                    39 KB
    flutter_assets                                                         88 KB
  resources.arsc                                                           30 KB
  AndroidManifest.xml                                                       3 KB
  lib/
    arm64-v8a                                                               6 MB
    Dart AOT symbols accounted decompressed size                            5 MB
      package:flutter                                                       3 MB
      dart:core                                                           277 KB
      package:goguma                                                      225 KB
      dart:typed_data                                                     212 KB
      dart:ui                                                             178 KB
      dart:io                                                             168 KB
      package:dbus                                                        158 KB
      dart:collection                                                     144 KB
      dart:async                                                          127 KB
      package:sqflite_common                                               68 KB
      dart:convert                                                         67 KB
      package:sqlite3                                                      63 KB
      package:sqflite_common_ffi                                           62 KB
      package:vector_math/
        vector_math_64.dart                                                40 KB
      package:flutter_local_notifications_linux                            38 KB
      package:characters                                                   32 KB
      package:material_color_utilities                                     32 KB
      package:flutter_typeahead/
        src                                                                30 KB
      dart:ffi                                                             30 KB
      package:flutter_local_notifications                                  29 KB
  classes.dex                                                             557 KB
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A summary of your APK analysis can be found at: /home/simon/.flutter-devtools/apk-code-size-analysis_02.json

[MaikuB]

Thanks didn't know about that command. I don't know if it's possible to resolve this one though. If anyone else here knows then contributions are welcome. Linux support itself was a contribution from the community. This may have to do with how the plugin is structured to allow notification details specific to each platform to be configured. I did a search and saw similar issue open that references the same APIs to do platform checks https://github.com/flutter/flutter/issues/14233

Edit: following the trail in the thread, path_provider has a similar issue and it's considered expected behaviour at the moment so if I'm not mistaken, looks like nothing can be done

[emersion]

I wonder whether isolating the type definitions in a separate file in the linux package, and including only that file from the common package would be enough. I'll experiment a bit with that idea.

[emersion]

This approach works fine to avoid including the whole package for type definitions, but we still need to decide which impl to use based on the Platform -- and that can't be done at compile-time sadly.

Indeed, looks like nothing can be done from our side for now, need changes in Dart/Flutter.

[llfbandit]

Setting the following in pubspec.yaml should help:

flutter:
  plugin:
    implements: flutter_local_notifications
    platforms:
      linux:
        dartPluginClass: flutter_local_notifications_linux

You can have a look to my repository for examples.