android - 如何在视频 View 中播放加密视频而不解密

Question

为了安全起见，我想在我的应用中播放加密的视频，以确保其他应用无法播放该视频。我已经加密和解密了视频并保存在外部存储中，但无法播放。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button encryptButton = (Button) findViewById(R.id.button);

    encryptButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            try {
                encrypt();
                Toast.makeText(getApplicationContext(), " Encryption complete ",
                        Toast.LENGTH_SHORT).show();
            }catch (InvalidKeyException e){
                e.printStackTrace();
            }catch (NoSuchPaddingException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
        }
    });

}

static void encrypt() throws IOException, NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException{
    FileInputStream fis = new FileInputStream(new File("/storage/emulated/0/DCIM/Camera/VID_20140217_144346.mp4"));
    File outfile = new File("/storage/emulated/0/DCIM/Camera/encrypt.mp4");
    int read;
    if(!outfile.exists())
        outfile.createNewFile();
    File decfile = new File("/storage/emulated/0/DCIM/Camera/decrypt.mp4");
    if(!decfile.exists())
        decfile.createNewFile();
    FileOutputStream fos = new FileOutputStream(outfile);
    FileInputStream encfis = new FileInputStream(outfile);
    FileOutputStream decfos = new FileOutputStream(decfile);
    Cipher encipher = Cipher.getInstance("AES");
    Cipher decipher = Cipher.getInstance("AES");
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    //byte key[] = {0x00,0x32,0x22,0x11,0x00,0x00,0x00,0x00,0x00,0x23,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
    SecretKey skey = kgen.generateKey();
    //Lgo
    encipher.init(Cipher.ENCRYPT_MODE, skey);
    CipherInputStream cis = new CipherInputStream(fis, encipher);
    decipher.init(Cipher.DECRYPT_MODE, skey);
    CipherOutputStream cos = new CipherOutputStream(decfos,decipher);
    while((read = cis.read())!=-1)
    {
        fos.write((char)read);
        fos.flush();
    }
    fos.close();
    while((read=encfis.read())!=-1)
    {
        cos.write(read);
        cos.flush();
    }
    cos.close();
}

我想要当该按钮单击该视频时加密并播放该视频。该视频只能在应用内播放。我搜索了很多东西，但无法正确理解。请帮我。谢谢。

Answer 1

您好，这里是一个第三方库，可以即时播放加密的视频。

http://libeasy.alwaysdata.net/network/#encoding

它构成本地服务器，并将视频帧分块提供给Videoview。现在，我只找到了适合您需求的库。