android AES加密信息

public class AESUtils {
    private static String CHARSETNAME = "UTF-8";// 编码
    private static String ALGORITHM = "AES";// 加密类型


    private static byte[] getKey() {
        byte[] seed = "your_fm_key".getBytes();
        KeyGenerator kg = null;
        try {
            kg = KeyGenerator.getInstance("AES");
        } catch (NoSuchAlgorithmException e) {
            return null;
        }
        SecureRandom sr = null;
        try {
            sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        sr.setSeed(seed);
        kg.init(128, sr);
        SecretKey sk = kg.generateKey();
        byte[] key = sk.getEncoded();
        return key;
    }

    /**
     * 对str进行DES加密
     *
     * @param str
     * @return
     */
    public static String getEncryptString(String str) {
        try {
            SecretKeySpec key = new SecretKeySpec(getKey(), ALGORITHM);
            Cipher cipher = Cipher.getInstance("AES/ECB/ZeroBytePadding");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] bytes = str.getBytes(CHARSETNAME);
            byte[] doFinal = cipher.doFinal(bytes);
            return Base64.encodeToString(doFinal, Base64.DEFAULT);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 对str进行DES解密
     *
     * @param str
     * @return
     */
    public static String getDecryptString(String str) {
        try {
            SecretKeySpec key = new SecretKeySpec(getKey(), ALGORITHM);
            Cipher cipher = Cipher.getInstance("AES/ECB/ZeroBytePadding");
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] bytes = Base64.decode(str, Base64.DEFAULT);
            byte[] doFinal = cipher.doFinal(bytes);
            return new String(doFinal, CHARSETNAME);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}