HarmonyOS 鸿蒙Next AES 解密的数据有问题

解密方法：
static async aesDecrypt(specifiedKey: string, decryptData: Uint8Array): Promise<Uint8Array | null> {
let result: Uint8Array | null = null;
try {
let keyBlob: cryptoFramework.DataBlob = {
data: new Uint8Array(buffer.from(specifiedKey, ‘utf-8’).buffer)
};
//生成一个对称密钥生成器
let symKeyGenerator = cryptoFramework.createSymKeyGenerator(‘AES128’);
let symKey = await symKeyGenerator.convertKey(keyBlob);
let cipherAlgName = ‘AES128|ECB|PKCS5’;
let cipher = cryptoFramework.createCipher(cipherAlgName);
let mode = cryptoFramework.CryptoMode.DECRYPT_MODE;
await cipher.init(mode, symKey, null);
let data: cryptoFramework.DataBlob = {
data: decryptData
};
let resultDataBlob = await cipher.doFinal(data);
result = resultDataBlob.data;
console.log(“解密数据为” + StringUtil.uint8ArrayToString(result));
} catch (e) {
console.log(“错误为:” + JSON.stringify(e));
}
return result;
}

这个获得的uint8Array数组里的第四位是32，但是后台解析或者android端解析都是0，所以我想知道为什么