encrypt password in android(client side) and decrypt in server side PHP with rsa

I have encrypt my password in android(client side) with rsa. As we know its using public key to encrypt and private key to decrypt. i generate public key and private key like code below

KeyPairGenerator gen = KeyPairGenerator.getInstance(RSA);

    gen.initialize(1024, new SecureRandom());

    KeyPair keyPair = gen.generateKeyPair();

    uk = keyPair.getPublic();

    rk = keyPair.getPrivate();

im succes to encrypt and decrypt this in android with this key. but in server side, the person who handle decryption need my private key as result that generate. how i give that private key to person that handle server side to decrypt data with my private key.

thanks...