MM Manuel MM Manuel - 5 months ago 19
Android Question

Progress of dataOutputStream.readFully

I'm receiving a file using dataInputStream.readFully, so
i'd like to show the progress of the transmision.
Is it possible to know the progress of readFully method?
Thank you.

Answer

No - the whole point is that it's a single call to make it simpler to read.

If you want to read more gradually (e.g. to update a progress bar) you can just read a chunk at a time with InputStream.read(byte[], int, int) in a loop until you've read all the data. For example:

byte[] data = new byte[bytesToRead];
int offset = 0;
int bytesRead;
while ((bytesRead = stream.read(data, offset, data.length - offset)) > -1) {
    offset += bytesRead;
    // Update progress indicator
}

This is just like the JDK 8 code for readFully, but with progress indication in the loop.

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