代码在JAVA上运行良好，但在Android上无法创建解密文件

我正在尝试为Android制作一个文件柜应用程序。对于加密和解密，我使用了一些我以前在JAVA上测试过的代码。它在JAVA上运行良好，但在Android平台上无法创建解密文件

我的代码有点像bellow

public class Cryptographer {
private static final String ALGORITHM = "AES";

private final static String ALGO_RANDOM_NUM_GENERATOR = "SHA1PRNG";

public static int encrypt(String key, File inputFile, File outputFile)
        throws CryptographyException {
    if(!outputFile.getParentFile().exists())outputFile.getParentFile().mkdir();
    return StartCryptography(Cipher.ENCRYPT_MODE, key, inputFile, outputFile);
}

public static int decrypt(String key, File inputFile, File outputFile)
        throws CryptographyException {
    if(!outputFile.getParentFile().exists())outputFile.getParentFile().mkdir();
    return StartCryptography(Cipher.DECRYPT_MODE, key, inputFile, outputFile);
}

private static int StartCryptography(int cipherMode, String key, File inputFile,
                                     File outputFile) throws CryptographyException {
    int performance = -1;
    try {
        SecureRandom random = SecureRandom.getInstance(ALGO_RANDOM_NUM_GENERATOR);
        random.setSeed(key.getBytes());
        KeyGenerator generator = KeyGenerator.getInstance(ALGORITHM);
        generator.init(random);
        SecretKey key1 = generator.generateKey();

        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(cipherMode, key1);

        FileInputStream inputStream = new FileInputStream(inputFile);
        byte[] inputBytes = new byte[(int) inputFile.length()];
        inputStream.read(inputBytes);

        byte[] outputBytes = cipher.doFinal(inputBytes);

        FileOutputStream outputStream = new FileOutputStream(outputFile);
        outputStream.write(outputBytes);

        inputStream.close();
        outputStream.close();
        performance = 1;

    } catch (NoSuchPaddingException | NoSuchAlgorithmException
            | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException | IOException ex) {
        throw new CryptographyException("Error encrypting/decrypting file", ex);
    } finally {
        return performance;
    }

 }
}

public void onKeyDown1(View view) throws CryptographyException {

        File outfile = new File(ExternalStorageDirectoryPath, "Encrypted");
        File outfileDec = new File(ExternalStorageDirectoryPath, "Decrypted");
        for (MyFiles f : files) {
            if (f.getCheckstate()) {
                File EncFile=new File(outfile,f.getName());
                //File DecFile=new File(outfileDec,f.getName());

                Cryptographer.encrypt(key, f, EncFile);

                Cryptographer.decrypt(key, EncFile, DecFile);

            }

        }
}

我正在使用一个按钮，当按下该按钮时，声明数组中的所有文件都应该首先加密，然后加密的文件将被解密到另一个位置。但是没有创建解密文件

我点击按钮的方法看起来像下面的

public class Cryptographer {
private static final String ALGORITHM = "AES";

private final static String ALGO_RANDOM_NUM_GENERATOR = "SHA1PRNG";

public static int encrypt(String key, File inputFile, File outputFile)
        throws CryptographyException {
    if(!outputFile.getParentFile().exists())outputFile.getParentFile().mkdir();
    return StartCryptography(Cipher.ENCRYPT_MODE, key, inputFile, outputFile);
}

public static int decrypt(String key, File inputFile, File outputFile)
        throws CryptographyException {
    if(!outputFile.getParentFile().exists())outputFile.getParentFile().mkdir();
    return StartCryptography(Cipher.DECRYPT_MODE, key, inputFile, outputFile);
}

private static int StartCryptography(int cipherMode, String key, File inputFile,
                                     File outputFile) throws CryptographyException {
    int performance = -1;
    try {
        SecureRandom random = SecureRandom.getInstance(ALGO_RANDOM_NUM_GENERATOR);
        random.setSeed(key.getBytes());
        KeyGenerator generator = KeyGenerator.getInstance(ALGORITHM);
        generator.init(random);
        SecretKey key1 = generator.generateKey();

        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(cipherMode, key1);

        FileInputStream inputStream = new FileInputStream(inputFile);
        byte[] inputBytes = new byte[(int) inputFile.length()];
        inputStream.read(inputBytes);

        byte[] outputBytes = cipher.doFinal(inputBytes);

        FileOutputStream outputStream = new FileOutputStream(outputFile);
        outputStream.write(outputBytes);

        inputStream.close();
        outputStream.close();
        performance = 1;

    } catch (NoSuchPaddingException | NoSuchAlgorithmException
            | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException | IOException ex) {
        throw new CryptographyException("Error encrypting/decrypting file", ex);
    } finally {
        return performance;
    }

 }
}

public void onKeyDown1(View view) throws CryptographyException {

        File outfile = new File(ExternalStorageDirectoryPath, "Encrypted");
        File outfileDec = new File(ExternalStorageDirectoryPath, "Decrypted");
        for (MyFiles f : files) {
            if (f.getCheckstate()) {
                File EncFile=new File(outfile,f.getName());
                //File DecFile=new File(outfileDec,f.getName());

                Cryptographer.encrypt(key, f, EncFile);

                Cryptographer.decrypt(key, EncFile, DecFile);

            }

        }
}

有人请帮帮我

ExternalStorageDirectoryPath

是通过调用

Environment.getExternalStorageDirectory（）.getAbsolutePath（）检索的
字符串

而MyFiles类是

public class MyFiles extends File {

boolean Checkstate=false;

public MyFiles(File dir, String name) {
    super(dir, name);
}

public MyFiles(String path) {
    super(path);
}

public MyFiles(String dirPath, String name) {
    super(dirPath, name);
}

public MyFiles(URI uri) {
    super(uri);
}

public void setCheckstate(boolean checkstate) {
    Checkstate = checkstate;
}

public boolean getCheckstate(){
    return Checkstate;
}


public MyFiles[] listFiles(FileFilter filter) {
    MyFiles[] files = listFiles();
    if (filter == null || files == null) {
        return files;
    }
    List<MyFiles> result = new ArrayList<MyFiles>(files.length);
    for (MyFiles file : files) {
        if (filter.accept(file)) {
            result.add(file);
        }
    }
    return result.toArray(new MyFiles[result.size()]);
}

public MyFiles[] listFiles() {
    return filenamesToFiles(list());
}

private MyFiles[] filenamesToFiles(String[] filenames) {
    if (filenames == null) {
        return null;
    }
    int count = filenames.length;
    MyFiles[] result = new MyFiles[count];
    for (int i = 0; i < count; ++i) {
        result[i] = new MyFiles(this, filenames[i]);
    }
    return result;
}

}

公共类MyFiles扩展文件{
布尔Checkstate=false；
公共MyFiles（文件目录、字符串名称）{
super（dir，name）；
}
公共MyFiles（字符串路径）{
超级（路径）；
}
公共MyFiles（字符串路径、字符串名称）{
super（dirPath，name）；
}
公共MyFiles（URI）{
超级（uri）；
}
public void setCheckstate（布尔checkstate）{
Checkstate=Checkstate；
}
公共布尔getCheckstate（）{
返回Checkstate；
}
公共MyFiles[]列表文件（文件过滤器过滤器）{
MyFiles[]files=listFiles（）；
if（filter==null | | files==null）{
归还文件；
}
列表结果=新的ArrayList（files.length）；
用于（MyFiles文件：文件）{
if（filter.accept（文件））{
结果.添加（文件）；
}
}
返回result.toArray（新的MyFiles[result.size（）]）；
}
公共MyFiles[]列表文件（）{
返回filenamesToFiles（list（））；
}
私有MyFiles[]文件名文件（字符串[]文件名）{
如果（文件名==null）{
返回null；
}
int count=filenames.length；
MyFiles[]结果=新MyFiles[计数]；
对于（int i=0；i
我想可能是您的android应用程序的清单文件中缺少权限。检查：
或者您正在尝试在不允许您的应用程序的位置写入内容
刚才我发现我的解密方法无法工作，因为出现了“javax.crypto.BadPaddingException:pad block corrupted”错误。但是我不知道如何修复它。如果包含MyFiles.java和可选的ExternalStorageDirectoryPath，它将更易于测试。我不知道自定义对象在循环中发生了什么