[BUG] Example cannot compile with Flutter 3 on Android

[hschendel]

Describe The Bug
The example does not build for Android

Expected Behavior
The example should build for Android

Screenshots & Recordings

$ flutter pub cache clean && flutter pub get && flutter run
This will remove everything inside /Users/user/.pub-cache.
You will have to run `flutter pub get` again in each project.
Are you sure? (y/N)? y
Removing pub cache directory /Users/user/.pub-cache.
Running "flutter pub get" in flutter_tools...                       9.1s
Running "flutter pub get" in example...                             4.3s
Launching lib/main.dart on SM G970F in debug mode...
e: /Users/user/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location/FlutterLocationService.kt: (124, 1): Class 'FlutterLocationService' is not abstract and does not implement abstract member public abstract fun onRequestPermissionsResult(p0: Int, p1: Array<(out) String!>, p2: IntArray): Boolean defined in io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener
e: /Users/user/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location/FlutterLocationService.kt: (258, 5): 'onRequestPermissionsResult' overrides nothing

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':location:compileDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 9s
Running Gradle task 'assembleDebug'...                              9.9s
Exception: Gradle task assembleDebug failed with exit code 1

Additional Information
Building for web works fine.

The whole thing was triggered by my upgrade to Flutter 3.0.0.

The root cause appears to be in flutterlocation, see Lyokone/flutterlocation#698 and Lyokone/flutterlocation#718, these issues also discuss workarounds.

This has to be fixed in flutterlocation, I wrote this ticket to avoid unnecessary research effort here ;-)

Changing the compileSdkVersion to 30 does not help.

---

Doctors Report

[✓] Flutter (Channel stable, 3.0.0, on macOS 12.3.1 21E258 darwin-arm, locale en-DE)
    • Flutter version 3.0.0 at /Users/hagen/bin/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ee4e09cce0 (3 days ago), 2022-05-09 16:45:18 -0700
    • Engine revision d1b9a6938a
    • Dart version 2.17.0
    • DevTools version 2.12.2

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/hagen/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2021.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • 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 11.0.11+0-b60-7772763)

[✓] Connected device (4 available)
    • SM G970F (mobile) • XYZ                                          • android-arm64  • Android 12 (API 31)
    • macOS (desktop)   • macos                                         • darwin-arm64   • macOS 12.3.1 21E258 darwin-arm
    • Chrome (web)      • chrome                                        • web-javascript • Google Chrome 101.0.4951.64

[✓] HTTP Host Availability
    • All required HTTP hosts are available

• No issues found!

To Reproduce
Steps to reproduce the behavior:

flutter pub cache clean && flutter pub get && flutter run

---

Severity
This will help us to label the issue quicker and decide what needs attention first. Only choose fatal if the entire app crashes, otherwise choose non-fatal.

• Non-Fatal
• Fatal / App Crashes

Frequency/Rarity
This will help us to label the issue quicker and decide what needs attention first.

• Once
• Uncommon
• Common
• Always

Applicable Platforms
Only select those that you've tested on - one or more. If possible, test on a variety of platforms.

• Android
• iOS
• Web
• Windows
• Others (beta platforms)

[JaffaKetchup]

Hi there, and thanks for the heads up. As you said, there's not much we can do about this, but we'll make sure to get ready for Flutter 3 otherwise ASAP.

[cristhianveal]

I'm the same since I updated flutter 3. but it's normal, hopefully it will be solved soon.

[noahvelasco]

To solve this issue temporarily please check out this other github link- its a small change on a file within the flutter folder on your machine.

[JaffaKetchup]

Good workaround, but always be cautious when editing cached package files!

[Zverik]

flutterlocation was updated a few minutes ago, so this issue might be obsolete.

[JaffaKetchup]

Thanks @Zverik, will have a look in a minute.

[JaffaKetchup]

#1236 contains the necessary fixes to get this fully project fully ready for Flutter 3

[hschendel]

Thank you @JaffaKetchup !