I got this issue suddenly as i didn't update or change any code or package

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file '/Users/amitbahadur/.pub-cache/hosted/pub.dev/geolocator_android-4.6.2/android/build.gradle' line: 29

* What went wrong:
A problem occurred evaluating project ':geolocator_android'.
> Could not get unknown property 'flutter' for extension 'android' of type com.android.build.gradle.LibraryExtension.

* 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.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':geolocator_android'.
> Failed to notify project evaluation listener.
   > Cannot invoke method substring() on null object
   > com.android.builder.errors.EvalIssueException: compileSdkVersion is not specified. Please add it to build.gradle

* 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 

BUILD FAILED in 1s
Error: Gradle task assembleDebug failed with exit code 1

i tried downgrading and upgrading the geolocator package and also update the flutter but still not working

I got this issue suddenly as i didn't update or change any code or package

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file '/Users/amitbahadur/.pub-cache/hosted/pub.dev/geolocator_android-4.6.2/android/build.gradle' line: 29

* What went wrong:
A problem occurred evaluating project ':geolocator_android'.
> Could not get unknown property 'flutter' for extension 'android' of type com.android.build.gradle.LibraryExtension.

* 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.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':geolocator_android'.
> Failed to notify project evaluation listener.
   > Cannot invoke method substring() on null object
   > com.android.builder.errors.EvalIssueException: compileSdkVersion is not specified. Please add it to build.gradle

* 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.

BUILD FAILED in 1s
Error: Gradle task assembleDebug failed with exit code 1

i tried downgrading and upgrading the geolocator package and also update the flutter but still not working

• android
• flutter
• gradle
• build.gradle
• geolocator

2 Answers 2

If you are using Flutter 3.24.4 or familiar, let downgrade to 4.6.1 or override it.

dependency_overrides:
  geolocator_android: 4.6.1

Change Flutter versions, try to downgrade.eg from 3.24 >> 3.22 it worked for me.