android aes 7.0异常

日志中可以看到：

of the Android SDK no longer support the Crypto provider.
 * If your app was relying on setSeed() to derive keys from strings, you
 * should switch to using SecretKeySpec to load raw key bytes directly OR
 * use a real key derivation function (KDF). See advice here
 *
  http://android-developers.blogspot.com/2016/06/security-crypto-provider-deprecated-in.html
 ***********************************

可以看到，加密那里需要更改，参考：​​https://www.jianshu.com/p/b854e97fb856​​

private static byte[] getRawKey(byte[] seed) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        SecureRandom sr = null;
        if (android.os.Build.VERSION.SDK_INT >= 17) {
            sr = SecureRandom.getInstance("SHA1PRNG", new CryptoProvider());
        } else {
            sr = SecureRandom.getInstance("SHA1PRNG");
        }
        sr.setSeed(seed);
        kgen.init(128, sr); // 192 and 256 bits may not be available
        SecretKey skey = kgen.generateKey();
        byte[] raw = skey.getEncoded();
        return

public static  class CryptoProvider extends Provider
        /**
         * Creates a Provider and puts parameters
         */
        public CryptoProvider() {
            super("Crypto", 1.0, "HARMONY (SHA1 digest; SecureRandom; SHA1withDSA signature)");
            put("SecureRandom.SHA1PRNG",
                    "org.apache.harmony.security.provider.crypto.SHA1PRNG_SecureRandomImpl");
            put("SecureRandom.SHA1PRNG ImplementedIn", "Software");
        }
    }