Как создать ZIP InputStream в Android без создания ZIP файла?

Я использую NanoHTTPD в качестве веб-сервера в своем Android APP, я надеюсь сжать некоторые файлы и создать InputStream на стороне сервера, и я загружаю InputStream на стороне клиента с помощью кода A.

Я прочитал код B в Как сделать zip и распаковать файлы?, но как создать ZIP InputStream в Android без создания ZIP файла?

Кстати, я не думаю, что Code C хороший способ, потому что он сначала делает ZIP файл, а затем конвертирует ZIP файл в FileInputStream, я надеюсь создать ZIP InputStream напрямую!

Код A

private Response ActionDownloadSingleFile(InputStream fis)    {      
    Response response = null;
    response = newChunkedResponse(Response.Status.OK, "application/octet-stream",fis);
    response.addHeader("Content-Disposition", "attachment; filename="+"my.zip");
    return response;
}

Код B

public static void zip(String[] files, String zipFile) throws IOException {
    BufferedInputStream origin = null;
    ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile)));
    try { 
        byte data[] = new byte[BUFFER_SIZE];

        for (int i = 0; i < files.length; i++) {
            FileInputStream fi = new FileInputStream(files[i]);    
            origin = new BufferedInputStream(fi, BUFFER_SIZE);
            try {
                ZipEntry entry = new ZipEntry(files[i].substring(files[i].lastIndexOf("/") + 1));
                out.putNextEntry(entry);
                int count;
                while ((count = origin.read(data, 0, BUFFER_SIZE)) != -1) {
                    out.write(data, 0, count);
                }
            }
            finally {
                origin.close();
            }
        }
    }
    finally {
        out.close();
    }
}

Код C

File file= new File("my.zip");
FileInputStream fis = null;
try
{
    fis = new FileInputStream(file);
} catch (FileNotFoundException ex)
{

}

//Create proper background thread pool. Not best but just for solution new Thread(new Runnable() { @Override public void run() { // Moves the current Thread into the background android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND); HttpURLConnection httpURLConnection = null; byte[] buffer = new byte[2048]; try { //Your http connection httpURLConnection = (HttpURLConnection) new URL("https://s3-ap-southeast-1.amazonaws.com/uploads-ap.hipchat.com/107225/1251522/SFSCjI8ZRB7FjV9/zvsd.zip").openConnection(); //Change below path to Environment.getExternalStorageDirectory() or something of your // own by creating storage utils File outputFilePath = new File ("/mnt/sdcard/Android/data/somedirectory/"); ZipInputStream zipInputStream = new ZipInputStream(new BufferedInputStream(httpURLConnection.getInputStream())); ZipEntry zipEntry = zipInputStream.getNextEntry(); int readLength; while(zipEntry != null){ File newFile = new File(outputFilePath, zipEntry.getName()); if (!zipEntry.isDirectory()) { FileOutputStream fos = new FileOutputStream(newFile); while ((readLength = zipInputStream.read(buffer)) > 0) { fos.write(buffer, 0, readLength); } fos.close(); } else { newFile.mkdirs(); } Log.i("zip file path = ", newFile.getPath()); zipInputStream.closeEntry(); zipEntry = zipInputStream.getNextEntry(); } // Close Stream and disconnect HTTP connection. Move to finally zipInputStream.closeEntry(); zipInputStream.close(); } catch (IOException e) { e.printStackTrace(); }finally { // Close Stream and disconnect HTTP connection. if (httpURLConnection != null) { httpURLConnection.disconnect(); } } } }).start();

Ответ 1