为了解决这个问题(我的应用在 iOS 上是 1.7 GB，而 Android 的 apk 文件只有 50 MB)我改变了 Unity 构建的压缩方法:

To solve that (My app was 1.7 GB for iOS, while Android's apk file is just 50 MB) I changed the compression method for Unity build:

Build Settings -> Compression Method -> LZ4HC

现在只有 ~80MB(而不是 1.7GB).希望它可以帮助某人.

Now it is just ~80MB (instead of 1.7 GB). Hope it helps someone.