解决方法
rm -rf ~/.gradle/caches
rm -rf ~/.gradle/daemon
之后尝试重新编译/执行程序
尝试记录
flutter clean
cd <proj_dir>/android
/.gradlew clean
rm -rf <proj_dir>/android/.gradle
rm -rf <proj_dir>/android/build
rm -rf ~/.gradle/caches
flutter pub cache repair
参考资料
Build cache problems “Could not read workspace metadata”