小编Pra*_*ash的帖子

我一直致力于项目,我们必须安全地将PDF保存在android sd卡中.我们希望在.net中加密它,因为它必须通过API传输.我在.NET中实现但无法在android中解密.

用于加密文件的代码

public static void EncryptFile(string inputFile, string outputFile)
    {
        try
        {
            string password = @"myKey123"; // Your Key Here
            UnicodeEncoding UE = new UnicodeEncoding();
            byte[] key = UE.GetBytes(password);

            string cryptFile = outputFile;
            FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);

            RijndaelManaged RMCrypto = new RijndaelManaged();
            RMCrypto.Mode = CipherMode.CBC; //remember this parameter
            RMCrypto.Padding = PaddingMode.PKCS7;  //remember this parameter
            RMCrypto.KeySize = 0x80;
            RMCrypto.BlockSize = 0x80;
            CryptoStream cs = new CryptoStream(fsCrypt,
                RMCrypto.CreateEncryptor(key, key),
                CryptoStreamMode.Write);

            FileStream fsIn = new FileStream(inputFile, FileMode.Open);

            int data; 
            while …

我想在画布上作画

我如何在中心的 android 画布上绘制它？我尝试使用canvas.drawLine但没有得到所需的输出