Execution failed for task ':fluttertoast:compileDebugKotlin' [closed]

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I tried flutter clean
flutter pub cache repair,
changing and versions of the fluttertoast package, and by removing it too,
deleted the android/.gradle directory and rebuilt.

Nothing worked.

Launching lib\main.dart on Redmi Note 4 in debug mode...
lib\main.dart:1
Parameter format not correct -
e: C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\fluttertoast-7.1.8\android\src\main\kotlin\io\github\ponnamkarthik\toast\fluttertoast\MethodCallHandlerImpl.kt: (45, 84): Unresolved reference: R
e: C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\fluttertoast-7.1.8\android\src\main\kotlin\io\github\ponnamkarthik\toast\fluttertoast\MethodCallHandlerImpl.kt: (70, 68): Unresolved reference: R
e: C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\fluttertoast-7.1.8\android\src\main\kotlin\io\github\ponnamkarthik\toast\fluttertoast\MethodCallHandlerImpl.kt: (85, 64): Unresolved reference: R
2

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':fluttertoast:compileDebugKotlin'.
> 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 39s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

I am gettin the same error. I tried rolling back to 7.1.6, invalidating caches, flutter clean... none solved the problem. I know I installed an Android related update in Android Studio. Maybe it was related to that? — jon
– jon, Commented Feb 19, 2021 at 19:29

jon · Accepted Answer · 2021-03-02 20:18:52Z

25

Updating the compileSdkVersion to 30 in my app/build.gradle solved it and allowed me to keep the latest gradle.

OLD ANSWER:

I'm not sure why, but I was able to resolve the problem by rolling back to

classpath 'com.android.tools.build:gradle:3.5.4'

in my top level build.gradle.

edited Mar 2, 2021 at 20:18

answered Feb 19, 2021 at 22:53

jon

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5 Comments

Peter Mortensen Over a year ago

Gradle what? Gradle file? Gradle folder? Gradle configuration? Gradle installation? Something else? Please respond by answer, not here in comments (without "Edit:", "Update:", or similar - the answer should appear as if it was written today).

Mohamed Saleh Over a year ago

Worked after flutter clean

Youssef Hegab Over a year ago

Worked for me after rolling back the build:gradle version

Carlos Peñaranda Over a year ago

classpath 'com.android.tools.build:gradle:3.5.4'

MAlhamry Over a year ago

recently i ran "flutter upgrade" then i faced similar issue. i tried all suggestions posted here but nothing worked. then i ran "flutter downgrade", "flutter clean", "flutter pub get", and the app worked fine.. seems there is issue with flutter new version?!

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