Example usage for java.nio.channels FileChannel transferTo

Introduction

In this page you can find the example usage for java.nio.channels FileChannel transferTo.

Prototype

public abstract long transferTo(long position, long count, WritableByteChannel target) throws IOException;

Source Link

Document

Transfers bytes from this channel's file to the given writable byte channel.

Usage

From source file:com.shinymayhem.radiopresets.ServiceRadioPlayer.java

public void copyLog() {
    //String path = Environment.getExternalStorageDirectory().getAbsolutePath();
    String path = getExternalFilesDir(null).getAbsolutePath();

    File src = getFileStreamPath(ActivityLogger.LOG_FILENAME);
    File dst = new File(path + File.separator + ActivityLogger.LOG_FILENAME);
    try {/*from  w  w w  .  j a  v  a 2 s  . co  m*/
        if (dst.createNewFile()) {
            if (LOCAL_LOGV)
                log("sd file created", "v");
        } else {
            if (LOCAL_LOGV)
                log("sd file exists?", "v");
        }
    } catch (IOException e2) {
        log("sd file error", "e");
        Toast.makeText(this, "sd file error", Toast.LENGTH_SHORT).show();
        e2.printStackTrace();
    }

    FileChannel in = null;
    FileChannel out = null;
    try {
        in = new FileInputStream(src).getChannel();
    } catch (FileNotFoundException e1) {
        log("in file not found", "e");
        Toast.makeText(this, "in file not found", Toast.LENGTH_SHORT).show();
        e1.printStackTrace();
    }
    try {
        out = new FileOutputStream(dst).getChannel();
    } catch (FileNotFoundException e1) {
        log("out file not found", "e");
        Toast.makeText(this, "out file not found", Toast.LENGTH_SHORT).show();
        e1.printStackTrace();
    }

    try {
        in.transferTo(0, in.size(), out);
        if (LOCAL_LOGD)
            log("log file copied to " + path + File.separator + ActivityLogger.LOG_FILENAME, "d");
        if (in != null) {
            in.close();
        }
        if (out != null) {
            out.close();
        }
        clearLog();
    } catch (IOException e) {
        log("error copying log file", "e");
        Toast.makeText(this, "error copying log file", Toast.LENGTH_SHORT).show();
        if (LOCAL_LOGV)
            e.printStackTrace();
    } finally {

    }
}

From source file:com.androidquery.AbstractAQuery.java

/**
 * Create a temporary file on EXTERNAL storage (sdcard) that holds the cached content of the url.
 * Returns null if url is not cached, or the system cannot create such file (sdcard is absent, such as in emulator).
 * /*from   w w w  . java 2 s.co m*/
 * The returned file is accessable to all apps, therefore it is ideal for sharing content (such as photo) via the intent mechanism.
 * 
 * <br>
 * <br>
 * Example Usage:
 * 
 * <pre>
 *   Intent intent = new Intent(Intent.ACTION_SEND);
 *   intent.setType("image/jpeg");
 *   intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
 *   startActivityForResult(Intent.createChooser(intent, "Share via:"), 0);
 * </pre>
 * 
 * <br>
 * The temp file will be deleted when AQUtility.cleanCacheAsync is invoked, or the file can be explicitly deleted after use.
 * 
 * @param url The url of the desired cached content.
 * @param filename The desired file name, which might be used by other apps to describe the content, such as an email attachment.
 * @return temp file
 * 
 */

public File makeSharedFile(String url, String filename) {

    File file = null;

    try {

        File cached = getCachedFile(url);

        if (cached != null) {

            File temp = AQUtility.getTempDir();

            if (temp != null) {

                file = new File(temp, filename);
                file.createNewFile();

                FileInputStream fis = new FileInputStream(cached);
                FileOutputStream fos = new FileOutputStream(file);

                FileChannel ic = fis.getChannel();
                FileChannel oc = fos.getChannel();

                try {
                    ic.transferTo(0, ic.size(), oc);
                } finally {
                    AQUtility.close(fis);
                    AQUtility.close(fos);
                    AQUtility.close(ic);
                    AQUtility.close(oc);
                }

            }
        }

    } catch (Exception e) {
        AQUtility.debug(e);
    }

    return file;
}

From source file:edu.harvard.iq.dvn.core.web.servlet.FileDownloadServlet.java

public void streamData(FileChannel in, WritableByteChannel out, String varHeader) {

    long position = 0;
    long howMany = 32 * 1024;

    try {//from   w ww.  j  av  a2 s  . c  o  m
        // If we are streaming a TAB-delimited file, we will need to add the
        // variable header line:

        if (varHeader != null) {
            ByteBuffer varHeaderByteBuffer = ByteBuffer.wrap(varHeader.getBytes());
            out.write(varHeaderByteBuffer);
        }

        while (position < in.size()) {
            in.transferTo(position, howMany, out);
            position += howMany;
        }

        in.close();
        out.close();
    } catch (IOException ex) {
        // whatever. we don't care at this point.
    }

}

From source file:es.pode.publicacion.negocio.servicios.SrvPublicacionServiceImpl.java

/**
 * Mueve el contenido de un directorio a otro directorio.
 * /*  ww w  .j  a  v a  2s .  c  om*/
 * @param oldDir
 *            Directorio origen.
 * @param newDir
 *            Directorio destino.
 * @return devuelve el tamanio del directorio movido.
 * @throws Exception
 * 
 */
protected Long handleMoveDir(File oldDir, File newDir) throws IOException {
    long longitudTransferida = 0;
    if (oldDir.isDirectory()) {
        newDir.mkdirs();
        String list[] = oldDir.list();

        for (int i = 0; i < list.length; i++) {
            String dest1 = newDir.getAbsolutePath() + "/" + list[i];
            String src1 = oldDir.getAbsolutePath() + "/" + list[i];
            longitudTransferida += handleMoveDir(new File(src1), new File(dest1)).longValue();
        }
    } else {
        FileInputStream fin = new FileInputStream(oldDir);
        FileOutputStream fos = new FileOutputStream(newDir);

        FileChannel sourceChannel = fin.getChannel();
        FileChannel targetChannel = fos.getChannel();
        longitudTransferida = sourceChannel.size();
        sourceChannel.transferTo(0, sourceChannel.size(), targetChannel);
        sourceChannel.close();
        targetChannel.close();
    }
    return new Long(longitudTransferida);
}