readByte abstract method

Future<int> readByte()

Reads the next byte of data from the input stream.

The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned.

This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Returns

The next byte of data, or -1 if the end of the stream is reached.

Example

final input = FileInputStream('data.txt');
int byte;
while ((byte = await input.readByte()) != -1) {
  print('Read byte: $byte');
}
await input.close();

Throws IOException if an I/O error occurs. Throws StreamClosedException if the stream has been closed.

Implementation

Future<int> readByte();