How to use

closeSocket

method

in

libcore.io.IoBridge

/**
 * Closes the socket.  After this method is invoked, subsequent
 * read/write operations will fail.
 */
public void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

@Override protected synchronized void implCloseSelectableChannel() throws IOException {
  connected = false;
  if (socket != null && !socket.isClosed()) {
    socket.close();
  } else {
    IoBridge.closeSocket(fd);
  }
}

@Override
public synchronized void close() {
  guard.close();
  try {
    IoBridge.closeSocket(fd);
  } catch (IOException ignored) {
  }
}

@Override
protected synchronized void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

@Override
protected synchronized void implCloseSelectableChannel() throws IOException {
  if (status != SOCKET_STATUS_CLOSED) {
    status = SOCKET_STATUS_CLOSED;
    if (socket != null && !socket.isClosed()) {
      socket.close();
    } else {
      IoBridge.closeSocket(fd);
    }
  }
}

private boolean isReachable(InetAddress destination, InetAddress source, int timeout) throws IOException {
  // TODO: try ICMP first (http://code.google.com/p/android/issues/detail?id=20106)
  FileDescriptor fd = IoBridge.socket(true);
  boolean reached = false;
  try {
    if (source != null) {
      IoBridge.bind(fd, source, 0);
    }
    IoBridge.connect(fd, destination, 7, timeout);
    reached = true;
  } catch (IOException e) {
    if (e.getCause() instanceof ErrnoException) {
      // "Connection refused" means the IP address was reachable.
      reached = (((ErrnoException) e.getCause()).errno == ECONNREFUSED);
    }
  }
  IoBridge.closeSocket(fd);
  return reached;
}

@Override
public synchronized void close() {
  guard.close();
  try {
    IoBridge.closeSocket(fd);
  } catch (IOException ignored) {
  }
}

/**
 * Closes the socket.  After this method is invoked, subsequent
 * read/write operations will fail.
 */
public void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

@Override protected synchronized void implCloseSelectableChannel() throws IOException {
  connected = false;
  if (socket != null && !socket.isClosed()) {
    socket.close();
  } else {
    IoBridge.closeSocket(fd);
  }
}

@Override
public synchronized void close() {
  guard.close();
  try {
    IoBridge.closeSocket(fd);
  } catch (IOException ignored) {
  }
}

/**
 * Closes the socket.  After this method is invoked, subsequent
 * read/write operations will fail.
 */
public void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

@Override
protected synchronized void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

@Override
public synchronized void close() {
  guard.close();
  try {
    IoBridge.closeSocket(fd);
  } catch (IOException ignored) {
  }
}

@Override
protected synchronized void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

/**
 * Closes the socket.  After this method is invoked, subsequent
 * read/write operations will fail.
 */
public void close() throws IOException {
  guard.close();
  IoBridge.closeSocket(fd);
}

@Override
public synchronized void close() {
  guard.close();
  try {
    IoBridge.closeSocket(fd);
  } catch (IOException ignored) {
  }
}

@Override
protected synchronized void implCloseSelectableChannel() throws IOException {
  if (status != SOCKET_STATUS_CLOSED) {
    status = SOCKET_STATUS_CLOSED;
    if (socket != null && !socket.isClosed()) {
      socket.close();
    } else {
      IoBridge.closeSocket(fd);
    }
  }
}

@Override
protected synchronized void implCloseSelectableChannel() throws IOException {
  if (status != SOCKET_STATUS_CLOSED) {
    status = SOCKET_STATUS_CLOSED;
    if (socket != null && !socket.isClosed()) {
      socket.close();
    } else {
      IoBridge.closeSocket(fd);
    }
  }
}

@Override
protected synchronized void implCloseSelectableChannel() throws IOException {
  if (status != SOCKET_STATUS_CLOSED) {
    status = SOCKET_STATUS_CLOSED;
    if (socket != null && !socket.isClosed()) {
      socket.close();
    } else {
      IoBridge.closeSocket(fd);
    }
  }
}

@Override
protected synchronized void implCloseSelectableChannel() throws IOException {
  if (status != SOCKET_STATUS_CLOSED) {
    status = SOCKET_STATUS_CLOSED;
    if (socket != null && !socket.isClosed()) {
      socket.close();
    } else {
      IoBridge.closeSocket(fd);
    }
  }
}