Example usage for java.io File length

Introduction

In this page you can find the example usage for java.io File length.

Prototype

public long length() 

Source Link

Document

Returns the length of the file denoted by this abstract pathname.

Usage

From source file:Main.java

public static byte[] readBytes(File file) throws IOException {
    //check/* w ww  .jav  a 2  s. c om*/
    if (!file.exists()) {
        throw new FileNotFoundException("File not exist: " + file);
    }
    if (!file.isFile()) {
        throw new IOException("Not a file:" + file);
    }

    long len = file.length();
    if (len >= Integer.MAX_VALUE) {
        throw new IOException("File is larger then max array size");
    }

    byte[] bytes = new byte[(int) len];
    FileInputStream in = null;
    try {
        in = new FileInputStream(file);
        in.read(bytes);
    } finally {
        close(in);
    }

    return bytes;
}

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From source file:Main.java

/**
 * Save a media URI into the download directory
 * @param context the context/*w  ww .j  av a2s .  c  o  m*/
 * @param srcFile the source file.
 * @param filename the filename (optional)
 * @return the downloads file path
 */
@SuppressLint("NewApi")
public static String saveMediaIntoDownloads(Context context, File srcFile, String filename, String mimeType) {
    String fullFilePath = saveFileInto(context, srcFile, Environment.DIRECTORY_DOWNLOADS, filename);

    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        if (null != fullFilePath) {
            DownloadManager downloadManager = (DownloadManager) context
                    .getSystemService(Context.DOWNLOAD_SERVICE);

            try {
                File file = new File(fullFilePath);
                downloadManager.addCompletedDownload(file.getName(), file.getName(), true, mimeType,
                        file.getAbsolutePath(), file.length(), true);
            } catch (Exception e) {
            }
        }
    }

    return fullFilePath;
}

---

From source file:com.doplgangr.secrecy.Util.java

public static Map<String, java.io.File> getAllStorageLocations() {
    Map<String, java.io.File> map = new TreeMap<String, File>();

    List<String> mMounts = new ArrayList<String>(99);
    //List<String> mVold = new ArrayList<String>(99);
    mMounts.add(Environment.getExternalStorageDirectory().getAbsolutePath());
    try {/*from   w  w  w  .j  a va2  s.c  o  m*/
        java.io.File mountFile = new java.io.File("/proc/mounts");
        if (mountFile.exists()) {
            Scanner scanner = new Scanner(mountFile);
            while (scanner.hasNext()) {
                String line = scanner.nextLine();
                //if (line.startsWith("/dev/block/vold/")) {
                String[] lineElements = line.split(" ");
                String element = lineElements[1];
                mMounts.add(element);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    /**
     try {
     java.io.File voldFile = new java.io.File("/system/etc/vold.fstab");
     if (voldFile.exists()) {
     Scanner scanner = new Scanner(voldFile);
     while (scanner.hasNext()) {
     String line = scanner.nextLine();
     //if (line.startsWith("dev_mount")) {
     String[] lineElements = line.split(" ");
     String element = lineElements[2];
            
     if (element.contains(":"))
     element = element.substring(0, element.indexOf(":"));
     mVold.add(element);
     }
     }
     } catch (Exception e) {
     e.printStackTrace();
     }
     **/

    /*
    for (int i = 0; i < mMounts.size(); i++) {
    String mount = mMounts.get(i);
    if (!mVold.contains(mount))
        mMounts.remove(i--);
    }
    mVold.clear();
    */

    List<String> mountHash = new ArrayList<String>(99);

    for (String mount : mMounts) {
        java.io.File root = new java.io.File(mount);
        Util.log(mount, "is checked");
        Util.log(mount, root.exists(), root.isDirectory(), canWrite(root));
        if (canWrite(root)) {
            Util.log(mount, "is writable");
            java.io.File[] list = root.listFiles();
            String hash = "[";
            if (list != null)
                for (java.io.File f : list)
                    hash += f.getName().hashCode() + ":" + f.length() + ", ";
            hash += "]";
            if (!mountHash.contains(hash)) {
                String key = root.getAbsolutePath() + " ("
                        + org.apache.commons.io.FileUtils.byteCountToDisplaySize(root.getUsableSpace())
                        + " free space)";
                mountHash.add(hash);
                map.put(key, root);
            }
        }
    }

    mMounts.clear();
    return map;
}

---

From source file:com.openideals.android.net.HttpManager.java

public static String uploadFile(String serviceEndpoint, Properties properties, String fileParam, String file)
        throws Exception {

    HttpClient httpClient = new DefaultHttpClient();

    HttpPost request = new HttpPost(serviceEndpoint);
    MultipartEntity entity = new MultipartEntity();

    Iterator<Map.Entry<Object, Object>> i = properties.entrySet().iterator();
    while (i.hasNext()) {
        Map.Entry<Object, Object> entry = (Map.Entry<Object, Object>) i.next();
        String key = (String) entry.getKey();
        String val = (String) entry.getValue();
        entity.addPart(key, new StringBody(val));
    }//  w  w w  . j a  v a 2  s  .c  o  m
    File upload = new File(file);
    Log.i("httpman", "upload file (" + upload.getAbsolutePath() + ") size=" + upload.length());

    entity.addPart(fileParam, new FileBody(upload));
    request.setEntity(entity);

    HttpResponse response = httpClient.execute(request);
    int status = response.getStatusLine().getStatusCode();

    if (status != HttpStatus.SC_OK) {

    } else {

    }

    return response.toString();

}

---

From source file:info.guardianproject.net.http.HttpManager.java

public static String uploadFile(String serviceEndpoint, Properties properties, String fileParam, String file)
        throws Exception {

    HttpClient httpClient = new DefaultHttpClient();

    HttpPost request = new HttpPost(serviceEndpoint);
    MultipartEntity entity = new MultipartEntity();

    Iterator<Map.Entry<Object, Object>> i = properties.entrySet().iterator();
    while (i.hasNext()) {
        Map.Entry<Object, Object> entry = (Map.Entry<Object, Object>) i.next();
        String key = (String) entry.getKey();
        String val = (String) entry.getValue();
        entity.addPart(key, new StringBody(val));

    }//from   w  ww .jav  a  2  s. c o  m
    File upload = new File(file);
    Log.i("httpman", "upload file (" + upload.getAbsolutePath() + ") size=" + upload.length());

    entity.addPart(fileParam, new FileBody(upload));
    request.setEntity(entity);

    HttpResponse response = httpClient.execute(request);
    int status = response.getStatusLine().getStatusCode();

    if (status != HttpStatus.SC_OK) {

    } else {

    }

    return response.toString();

}

---

From source file:de.bps.onyx.util.SummaryCheckSumValidator.java

/**
 * Validates the Onyx test result summary pages checksum.
 * /*from w w  w. j  a  v  a2 s .c  o  m*/
 * @param file
 *            The file containing the summary HTML
 * @return SummaryChecksumValidatorResult structure. The contained validated
 *         field contains the validation result.
 * 
 * @see SummaryChecksumValidatorResult
 */
public static SummaryChecksumValidatorResult validate(final File file) {
    FileInputStream fis = null;
    final ByteArrayOutputStream baos = new ByteArrayOutputStream((int) file.length());
    try {
        fis = new FileInputStream(file);
        final byte[] buf = new byte[102400];
        int read = 0;
        while ((read = fis.read(buf)) >= 0) {
            baos.write(buf, 0, read);
        }
    } catch (final IOException e) {
        //         log.error("Error reading file to validate: " + file.getAbsolutePath(), e);
        final SummaryChecksumValidatorResult result = new SummaryChecksumValidatorResult();
        result.result = "onyx.summary.validation.result.error.reading.file";
        result.info = file.getAbsolutePath() + " - " + e.getMessage();
        return result;

    } finally {
        try {
            if (fis != null) {
                fis.close();
                fis = null;
            }
        } catch (final Exception e) {
            // ignore
        }
    }

    try {
        baos.flush();
    } catch (final IOException e) {
        // ignore
    }

    final String html = baos.toString();

    try {
        baos.close();
    } catch (final IOException e) {
        // ignore
    }

    return internalValidate(html);
}

---

From source file:in.goahead.apps.util.URLUtils.java

public static String DownloadFileFromURL(String url, String savePath)
        throws MalformedURLException, IOException {
    String fileName = null;/*from   www.j a v a 2  s .  c om*/
    fileName = getURLFileName(url);

    String absoluteFileName = savePath + "/" + fileName;
    Logger.debug(absoluteFileName);
    File f = new File(absoluteFileName);
    long skipBytes = 0;
    if (f.exists()) {
        skipBytes = f.length();
    }
    Logger.debug(skipBytes);
    InputStream fileDownloadStream = OpenURL(url, skipBytes);
    DownloadStream(fileDownloadStream, absoluteFileName, skipBytes);

    return fileName;
}

---

From source file:cz.autoclient.league_of_legends.DataLoader.java

public static String stringFromFile(File file) throws FileNotFoundException {
    char[] buff = new char[(int) file.length()];
    try {/*from w  w w  . j a  v a  2  s  . c  om*/
        (new FileReader(file)).read(buff);
    } catch (IOException e) {
        throw new FileNotFoundException("Invalid file.");
    }

    return new StringBuilder().append(buff).toString();
}

---

From source file:Main.java

public static long getFolderSize(File folder) throws IllegalArgumentException {
    // Validate//from   w  ww  .j a  va 2s.c o  m
    if (folder == null || !folder.isDirectory())
        throw new IllegalArgumentException("Invalid   folder ");
    String list[] = folder.list();
    if (list == null || list.length < 1)
        return 0;

    // Get size
    File object = null;
    long folderSize = 0;
    for (int i = 0; i < list.length; i++) {
        object = new File(folder, list[i]);
        if (object.isDirectory())
            folderSize += getFolderSize(object);
        else if (object.isFile())
            folderSize += object.length();
    }
    return folderSize;
}

---

From source file:com.parse.ParseKeyValueCache.java

static void saveToKeyValueCache(String key, String value) {
    synchronized (MUTEX_IO) {
        File prior = getKeyValueCacheFile(key);
        if (prior != null) {
            prior.delete();/*from w ww .  ja  va2 s  .c  o m*/
        }
        File f = createKeyValueCacheFile(key);
        try {
            ParseFileUtils.writeByteArrayToFile(f, value.getBytes("UTF-8"));
        } catch (UnsupportedEncodingException e) {
            // do nothing
        } catch (IOException e) {
            // do nothing
        }

        // Check if we should kick out old cache entries
        File[] files = getKeyValueCacheDir().listFiles();
        // We still need this check since dir.mkdir() may fail
        if (files == null || files.length == 0) {
            return;
        }

        int numFiles = files.length;
        int numBytes = 0;
        for (File file : files) {
            numBytes += file.length();
        }

        // If we do not need to clear the cache, simply return
        if (numFiles <= maxKeyValueCacheFiles && numBytes <= maxKeyValueCacheBytes) {
            return;
        }

        // We need to kick out some cache entries.
        // Sort oldest-first. We touch on read so mtime is really LRU.
        // Sometimes (i.e. tests) the time of lastModified isn't granular enough,
        // so we resort
        // to sorting by the file name which is always prepended with time in ms
        Arrays.sort(files, new Comparator<File>() {
            @Override
            public int compare(File f1, File f2) {
                int dateCompare = Long.valueOf(f1.lastModified()).compareTo(f2.lastModified());
                if (dateCompare != 0) {
                    return dateCompare;
                } else {
                    return f1.getName().compareTo(f2.getName());
                }
            }
        });

        for (File file : files) {
            numFiles--;
            numBytes -= file.length();
            file.delete();

            if (numFiles <= maxKeyValueCacheFiles && numBytes <= maxKeyValueCacheBytes) {
                break;
            }
        }
    }
}

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