Example usage for java.io BufferedInputStream BufferedInputStream

Introduction

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

Prototype

public BufferedInputStream(InputStream in, int size) 

Source Link

Document

Creates a BufferedInputStream with the specified buffer size, and saves its argument, the input stream in, for later use.

Usage

From source file:Main.java

public static int[] readInts(String file) throws IOException {
    DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file), 4 * 1024));
    try {//from  w  w w  . j  a va2s  .  c o m
        int len = in.readInt();
        int[] ints = new int[len];
        for (int i = 0; i < len; i++) {
            ints[i] = in.readInt();
        }
        return ints;
    } finally {
        in.close();
    }
}

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From source file:Main.java

public static float[] readFloats(String file) throws IOException {
    DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file), 4 * 1024));
    try {/*from  w  ww.j a v a2  s  .  co m*/
        int len = in.readInt();
        float[] floats = new float[len];
        for (int i = 0; i < len; i++) {
            floats[i] = in.readFloat();
        }
        return floats;
    } finally {
        in.close();
    }
}

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From source file:Main.java

/**
 * Loads a bitmap from the specified url. This can take a while, so it should not
 * be called from the UI thread.//from   w w w  .  j  a v a2  s .  com
 * 
 * @param url The location of the bitmap asset
 * 
 * @return The bitmap, or null if it could not be loaded
 */
public static Bitmap loadBitmap(String url) {
    Bitmap bitmap = null;
    InputStream in = null;
    BufferedOutputStream out = null;

    try {
        in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);

        final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
        out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
        copy(in, out);
        out.flush();

        final byte[] data = dataStream.toByteArray();
        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
    } catch (IOException e) {
        Log.e(TAG, "Could not load Bitmap from: " + url);
    } finally {
        closeStream(in);
        closeStream(out);
    }

    return bitmap;
}

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From source file:Main.java

public static byte[] readContentBytesFromFile(File fileForRead) {
    if (fileForRead == null) {
        return null;
    } else if (fileForRead.exists() && fileForRead.isFile()) {
        ReentrantReadWriteLock.ReadLock readLock = getLock(fileForRead.getAbsolutePath()).readLock();
        readLock.lock();/*w  ww .java2  s  . c  o  m*/
        Object data = null;
        BufferedInputStream input = null;

        try {
            byte[] data1 = new byte[(int) fileForRead.length()];
            int e = 0;
            input = new BufferedInputStream(new FileInputStream(fileForRead), 8192);

            while (e < data1.length) {
                int bytesRemaining = data1.length - e;
                int bytesRead = input.read(data1, e, bytesRemaining);
                if (bytesRead > 0) {
                    e += bytesRead;
                }
            }

            byte[] bytesRemaining1 = data1;
            return bytesRemaining1;
        } catch (IOException var10) {
        } finally {
            closeQuietly(input);
            readLock.unlock();
        }

        return null;
    } else {
        return null;
    }
}

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From source file:Main.java

static public InputStream createInputStream(File file) throws IOException {
    String filename = file.getName().toLowerCase();
    if (filename.endsWith(".gz")) {
        // a buffered output stream sped processing up by 4X! in prod
        GZIPInputStream gis = new GZIPInputStream(new FileInputStream(file), 1024 * 1024); // 1 MB buffer
        return new BufferedInputStream(gis, 1024 * 1024); // 1 MB buffer
        /**        } else if (filename.endsWith(".lzf")) {
         // a buffered output stream is not necessary
         return new LZFInputStream(new FileInputStream(file));
         *///from www.  ja  v  a 2 s .  c  o  m
    } else {
        return null;
    }
}

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From source file:Main.java

public static Bitmap loadBitmapDirectStream(String url, BitmapFactory.Options opt) {
    Bitmap bitmap = null;//from w ww  . j a va 2  s.  c  om
    InputStream is = null;
    try {
        is = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
        bitmap = BitmapFactory.decodeStream(is, null, opt);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        Log.e(TAG, "IOException in loadBitmap");
        e.printStackTrace();
    } catch (OutOfMemoryError e) {
        // TODO Auto-generated catch block
        Log.e(TAG, "OutOfMemoryError in loadBitmap");
        e.printStackTrace();
    } finally {
        closeStream(is);
    }
    return bitmap;
}

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From source file:Main.java

public static String getSha1(FileDescriptor fd) {
    MessageDigest md;// www .j  a va 2  s  .c o m
    try {
        md = MessageDigest.getInstance("SHA-1");
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
    byte[] b = new byte[4096];
    FileInputStream fis = new FileInputStream(fd);
    InputStream is = new BufferedInputStream(fis, 4096);
    try {
        for (int n; (n = is.read(b)) != -1;) {
            md.update(b, 0, n);
        }
    } catch (IOException e) {
        Log.w(TAG, "IOException while computing SHA-1");
        return null;
    }
    byte[] sha1hash = new byte[40];
    sha1hash = md.digest();
    return getHex(sha1hash);
}

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From source file:Main.java

public static File getFileFromCacheOrURL(File cacheDir, URL url) throws IOException {
    Log.i(TAG, "getFileFromCacheOrURL(): url = " + url.toExternalForm());

    String filename = url.getFile();
    int lastSlashPos = filename.lastIndexOf('/');
    String fileNameNoPath = new String(lastSlashPos == -1 ? filename : filename.substring(lastSlashPos + 1));

    File file = new File(cacheDir, fileNameNoPath);

    if (file.exists()) {
        if (file.length() > 0) {
            Log.i(TAG, "File exists in cache as: " + file.getAbsolutePath());
            return file;
        } else {// www. j av  a  2s .c o  m
            Log.i(TAG, "Deleting zero length file " + file.getAbsolutePath());
            file.delete();
        }
    }

    Log.i(TAG, "File " + file.getAbsolutePath() + " does not exists.");

    URLConnection ucon = url.openConnection();
    ucon.setReadTimeout(5000);
    ucon.setConnectTimeout(30000);

    InputStream is = ucon.getInputStream();
    BufferedInputStream inStream = new BufferedInputStream(is, 1024 * 5);
    FileOutputStream outStream = new FileOutputStream(file);
    byte[] buff = new byte[5 * 1024];

    // Read bytes (and store them) until there is nothing more to read(-1)
    int len;
    while ((len = inStream.read(buff)) != -1) {
        outStream.write(buff, 0, len);
    }

    // Clean up
    outStream.flush();
    outStream.close();
    inStream.close();
    return file;
}

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From source file:Main.java

public static String zip(String filename) throws IOException {
    BufferedInputStream origin = null;
    Integer BUFFER_SIZE = 20480;//from  ww w .  java 2s .c om

    if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) {

        File flockedFilesFolder = new File(
                Environment.getExternalStorageDirectory() + File.separator + "FlockLoad");
        System.out.println("FlockedFileDir: " + flockedFilesFolder);
        String uncompressedFile = flockedFilesFolder.toString() + "/" + filename;
        String compressedFile = flockedFilesFolder.toString() + "/" + "flockZip.zip";
        ZipOutputStream out = new ZipOutputStream(
                new BufferedOutputStream(new FileOutputStream(compressedFile)));
        out.setLevel(9);
        try {
            byte data[] = new byte[BUFFER_SIZE];
            FileInputStream fi = new FileInputStream(uncompressedFile);
            System.out.println("Filename: " + uncompressedFile);
            System.out.println("Zipfile: " + compressedFile);
            origin = new BufferedInputStream(fi, BUFFER_SIZE);
            try {
                ZipEntry entry = new ZipEntry(
                        uncompressedFile.substring(uncompressedFile.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();
        }
        return "flockZip.zip";
    }
    return null;
}

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From source file:Main.java

/**
 * Decodes image from inputstream into a new Bitmap of specified dimensions.
 *
 * This is a long-running operation that must run in a background thread.
 *
 * @param is InputStream containing the image.
 * @param maxWidth target width of the output Bitmap.
 * @param maxHeight target height of the output Bitmap.
 * @return new Bitmap containing the image.
 * @throws IOException//from w w  w .ja v  a2 s  . c om
 */
public static Bitmap decodeBitmapBounded(InputStream is, int maxWidth, int maxHeight) throws IOException {
    BufferedInputStream bufferedInputStream = new BufferedInputStream(is, STREAM_BUFFER_SIZE);
    try {
        bufferedInputStream.mark(STREAM_BUFFER_SIZE); // should be enough to read image dimensions.

        // TODO(mattfrazier): fail more gracefully if mark isn't supported, but it should always be
        // by bufferedinputstream.

        BitmapFactory.Options bmOptions = new BitmapFactory.Options();
        bmOptions.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(bufferedInputStream, null, bmOptions);
        bufferedInputStream.reset();

        bmOptions.inJustDecodeBounds = false;
        bmOptions.inSampleSize = calculateInSampleSize(bmOptions.outWidth, bmOptions.outHeight, maxWidth,
                maxHeight);

        // TODO(mattfrazier): Samsung devices yield a rotated bitmap no matter what orientation is
        // captured. Read Exif data and rotate in place or communicate Exif data and rotate display
        // with matrix.
        return BitmapFactory.decodeStream(bufferedInputStream, null, bmOptions);
    } finally {
        bufferedInputStream.close();
    }
}

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