aurora_bg_imagemsg_default not found

[netgb]

Android resource linking failed
aurora-imui-examples/Themes-example/Android/app/build/intermediates/incremental/mergeDebugResources/stripped.dir/layout/item_msglist_black_receive_image.xml:35: error: resource drawable/aurora_bg_imagemsg_default (aka cn.jiguang.imuisample:drawable/aurora_bg_imagemsg_default) not found.
aurora-imui-examples/Themes-example/Android/app/build/intermediates/incremental/mergeDebugResources/stripped.dir/layout/item_msglist_black_send_image.xml:35: error: resource drawable/aurora_bg_imagemsg_default (aka cn.jiguang.imuisample:drawable/aurora_bg_imagemsg_default) not found.
error: failed linking file resources.

[netgb]

请问这文件在哪找到，项目资源文件没有发现，运行失败。