Cryptography android application

I programmed an app that encrypts the text using AES algorithm and encrypts the key using a hash algorithm at the same time, the idea is you can encrypt your message and encrypt the key "since it has been hashed so, you can't decrypt it back" then save that information, now you can send this message(Cipher-text) to a friend or whomever you want with the same key (Before hashing). Finally, the receiver must have the same app to decrypt the message.