Example usage for java.nio ByteBuffer allocate

Introduction

In this page you can find the example usage for java.nio ByteBuffer allocate.

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:Main.java

public static byte[] bitmapToByteArray(Bitmap bitmap) {
    int bytes = bitmap.getByteCount();
    ByteBuffer buf = ByteBuffer.allocate(bytes);
    bitmap.copyPixelsToBuffer(buf);/*from ww  w .  ja v  a  2s  . c o  m*/
    byte[] byteArray = buf.array();
    return byteArray;
}

From source file:Main.java

private static short stream2Short(byte[] stream, int offset) {
    ByteBuffer buffer = ByteBuffer.allocate(2);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    buffer.put(stream[offset]);/*from w w  w .  jav  a2 s.c  om*/
    buffer.put(stream[offset + 1]);
    return buffer.getShort(0);
}

From source file:Main.java

public final static ByteBuffer toNALFileFormat(final ByteBuffer buffer) {
    ByteBuffer result = ByteBuffer.allocate(buffer.remaining());
    result.put(buffer);/*from  www  .j a  v  a 2  s .c o  m*/
    result.flip();
    int length = 0;
    int position = -1;
    int remaining = result.remaining() - 3;
    for (int i = 0; i < remaining; ++i) {
        if (result.get(i) == 0x00 && result.get(i + 1) == 0x00 && result.get(i + 2) == 0x00
                && result.get(i + 3) == 0x01) {
            if (0 <= position) {
                result.putInt(position, length - 3);
            }
            position = i;
            length = 0;
        } else {
            ++length;
        }
    }
    result.putInt(position, length);
    return result;
}

From source file:Main.java

public static char[] getChars(byte[] buffer, int offset, int length) {

    ByteBuffer bb = ByteBuffer.allocate(length);
    bb.put(buffer, offset, length);//ww w . j av a  2s.c  om
    bb.flip();

    return Charset.defaultCharset().decode(bb).array();
}

From source file:Main.java

public static IntBuffer newIntBuffer(int numInts) {
    ByteBuffer buffer = ByteBuffer.allocate(numInts * 4);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asIntBuffer();
}

From source file:Main.java

public static LongBuffer newLongBuffer(int numLongs) {
    ByteBuffer buffer = ByteBuffer.allocate(numLongs * 8);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asLongBuffer();
}

From source file:Main.java

public static byte[] getCharacteristicWriteByteArray(int data) {
    // Designed by our hardware, characteristic
    short inputShort = ((short) data);
    byte[] inputData = ByteBuffer.allocate(6).putShort(inputShort).array();
    return inputData;
}

From source file:Main.java

public static synchronized byte[] int16tobyte(int a) {
    byte[] inttemp = new byte[2];
    inttemp[1] = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(a).get(1);
    inttemp[0] = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(a).get(0);
    return inttemp;
}

From source file:Main.java

public static String readTxtFromFile(File file) throws Exception {
    ByteBuffer buffer = ByteBuffer.allocate((int) file.length());
    FileInputStream in = new FileInputStream(file);
    in.getChannel().read(buffer);//from   w ww  .  java  2 s  .  c  o m
    in.close();
    return new String(buffer.array());
}

From source file:Main.java

public static String convertBitmapToBase64(Bitmap bitmap) {
    final int size = bitmap.getByteCount();

    ByteBuffer dst = ByteBuffer.allocate(size);
    bitmap.copyPixelsToBuffer(dst);//  w w w .  ja v  a2  s. c  o m
    return Base64.encodeToString(dst.array(), Base64.DEFAULT);
}