通过反编译和开发人员将密钥保护到Android应用程序中

I am working on a project which requires the secret key to be hidden somewhere in the Android app, so that it can't be taken out even after decompilation. The requirement even states that the key should not be visible to the developer, that means it should be embedded into some pre-compiled library. I have tried the following things:I am working on a project which requires the se