我正在尝试将Python / Kivy应用程序编译为APK，但出现此错误：
WARNING: Received a --sdk argument, but this argument is deprecated and does nothing.
BUILD FAILURE: No main.py(o) found in your app directory. This
file must exist to act as the entry point for you app. If your app is
started by a file with a different name, rename it to main.py or add a
main.py that loads it.
我该如何解决？ PS：我有一个main.py