AOSP编译错误整理

1. //prebuilts/sdk/current/extras/material-design:android-support-design-bottomappbar javac ninja: build stopped: subcommand failed. 22:47:55 ninja failed with: exit status

android9编译，这个问题目不知道什么原因，执行一下命令可以解决

rm -r out/target/common/obj/JAVA_LIBRARIES