Android Utililty Methods AES Decrypt

return decrypt(DEFAULT_KEY, src);

try {
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec ivs = new IvParameterSpec(defaultIV);
    cipher.init(Cipher.DECRYPT_MODE, getSecretKey(key), ivs);
    return cipher.doFinal(content);
} catch (Exception e) {
    e.printStackTrace();
return null;

try {
    SecretKeySpec key = createKey(password);
    Cipher cipher = Cipher.getInstance(CipherMode);
    cipher.init(Cipher.DECRYPT_MODE, key);
    byte[] result = cipher.doFinal(content);
    return result;
} catch (Exception e) {
    e.printStackTrace();
...

try {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(password.getBytes()));
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, key);
...

try {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(password.getBytes()));
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, key);
...

byte[] result = null;
try {
    SecretKeySpec key = new SecretKeySpec(
            getRawKey(password.getBytes()), "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, key);
    result = cipher.doFinal(content);
} catch (Exception e) {
...

try {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(password.getBytes()));
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, key);
...

return decrypt(data, key, DEFAULT_CIPHER_ALGORITHM);

Cipher cipher = Cipher.getInstance(cipherAlgorithm);
cipher.init(Cipher.DECRYPT_MODE, key);
return cipher.doFinal(data);

return decrypt(data, key, DEFAULT_CIPHER_ALGORITHM);