Android Java:尝试让这个AES加密库工作，但没有成功

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class AesEncryptionExample {

    private static final String AES_KEY = "YourAESKey";

    public static String encrypt(String input) {
        try {
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            SecretKeySpec secretKey = new SecretKeySpec(AES_KEY.getBytes(), "AES");
            cipher.init(Cipher.ENCRYPT_MODE, secretKey);
            byte[] encryptedBytes = cipher.doFinal(input.getBytes(StandardCharsets.UTF_8));
            return Base64.getEncoder().encodeToString(encryptedBytes);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String decrypt(String encryptedInput) {
        try {
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            SecretKeySpec secretKey = new SecretKeySpec(AES_KEY.getBytes(), "AES");
            cipher.init(Cipher.DECRYPT_MODE, secretKey);
            byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedInput));
            return new String(decryptedBytes, StandardCharsets.UTF_8);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        String plaintext = "Hello, World!";
        String encrypted = encrypt(plaintext);
        String decrypted = decrypt(encrypted);

        System.out.println("Plaintext: " + plaintext);
        System.out.println("Encrypted: " + encrypted);
        System.out.println("Decrypted: " + decrypted);
    }
}