[Flutter] source value 8 is obsolete and will be removed in a future release 에러

warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
3 warnings
warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
3 warnings
warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
3 warnings

 

AOS로 실행은 되지만 위와 같은 빨간줄이 계속 뜨는걸 볼 수 있습니다.

이 경우에는 android/build.gradle에서 allprojects 내에 아래 코드를 추가해주시면 됩니다.

 

tasks.withType(JavaCompile) {
  options.compilerArgs << '-Xlint:-options'
}