android端调用AES解密报错

[isaactalx]

将java后台加密的文件在android端进行解密，下面是后台拿过来的代码，我照网上的改了下，只能在手机上加解密，但是后台加密的仿手机上报了javax.crypto.BadPaddingException的错

public class AESCoder {

	private static byte[] getRawKey(byte[] seed) throws Exception {
		KeyGenerator kgen = KeyGenerator.getInstance("AES");
		//
	//	SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
		//这里针对android要进行修改
		  SecureRandom sr = null;  
	       if (android.os.Build.VERSION.SDK_INT >=  17) {  
	         sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
	       } 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 raw;
	}

	public static byte[] encrypt(byte[] seed, byte[] plaintext)
			throws Exception {
		byte[] raw = getRawKey(seed);
		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
		byte[] encrypted = cipher.doFinal(plaintext);
		return encrypted;
	}

	public static byte[] decrypt(byte[] seed, byte[] ciphertext)
			throws Exception {
		byte[] raw = getRawKey(seed);
		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
		cipher.init(Cipher.DECRYPT_MODE, skeySpec);
		byte[] decrypted = cipher.doFinal(ciphertext);
		
		return decrypted;
	}

}