How to use

estimateLength

method

in

com.badlogic.gdx.files.FileHandle

/** Reads the entire file into a string using the specified charset.
 * @param charset If null the default charset is used.
 * @throws GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString (String charset) {
  StringBuilder output = new StringBuilder(estimateLength());
  InputStreamReader reader = null;
  try {
    if (charset == null)
      reader = new InputStreamReader(read());
    else
      reader = new InputStreamReader(read(), charset);
    char[] buffer = new char[256];
    while (true) {
      int length = reader.read(buffer);
      if (length == -1) break;
      output.append(buffer, 0, length);
    }
  } catch (IOException ex) {
    throw new GdxRuntimeException("Error reading layout file: " + this, ex);
  } finally {
    StreamUtils.closeQuietly(reader);
  }
  return output.toString();
}

/** Reads the entire file into a string using the specified charset.
 * @param charset If null the default charset is used.
 * @throws GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString (String charset) {
  StringBuilder output = new StringBuilder(estimateLength());
  InputStreamReader reader = null;
  try {
    if (charset == null)
      reader = new InputStreamReader(read());
    else
      reader = new InputStreamReader(read(), charset);
    char[] buffer = new char[256];
    while (true) {
      int length = reader.read(buffer);
      if (length == -1) break;
      output.append(buffer, 0, length);
    }
  } catch (IOException ex) {
    throw new GdxRuntimeException("Error reading layout file: " + this, ex);
  } finally {
    StreamUtils.closeQuietly(reader);
  }
  return output.toString();
}

/** Reads the entire file into a byte array.
 * @throws GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public byte[] readBytes () {
  InputStream input = read();
  try {
    return StreamUtils.copyStreamToByteArray(input, estimateLength());
  } catch (IOException ex) {
    throw new GdxRuntimeException("Error reading file: " + this, ex);
  } finally {
    StreamUtils.closeQuietly(input);
  }
}

/** Reads the entire file into a byte array.
 * @throws GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public byte[] readBytes () {
  InputStream input = read();
  try {
    return StreamUtils.copyStreamToByteArray(input, estimateLength());
  } catch (IOException ex) {
    throw new GdxRuntimeException("Error reading file: " + this, ex);
  } finally {
    StreamUtils.closeQuietly(input);
  }
}

/** Reads the entire file into a string using the specified charset.
 * @param charset If null the default charset is used.
 * @throws GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString (String charset) {
  StringBuilder output = new StringBuilder(estimateLength());
  InputStreamReader reader = null;
  try {
    if (charset == null)
      reader = new InputStreamReader(read());
    else
      reader = new InputStreamReader(read(), charset);
    char[] buffer = new char[256];
    while (true) {
      int length = reader.read(buffer);
      if (length == -1) break;
      output.append(buffer, 0, length);
    }
  } catch (IOException ex) {
    throw new GdxRuntimeException("Error reading layout file: " + this, ex);
  } finally {
    StreamUtils.closeQuietly(reader);
  }
  return output.toString();
}

/** Reads the entire file into a byte array.
 * @throws GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public byte[] readBytes () {
  InputStream input = read();
  try {
    return StreamUtils.copyStreamToByteArray(input, estimateLength());
  } catch (IOException ex) {
    throw new GdxRuntimeException("Error reading file: " + this, ex);
  } finally {
    StreamUtils.closeQuietly(input);
  }
}