Question

I need to transfer a byte[] via TCP Socket in android -client side.
i tried to use the following code :

public static int readBytes(byte[] myByteArray) throws IOException {
    InputStream in = socket.getInputStream();
    DataInputStream dis = new DataInputStream(in);

    int len = dis.readInt(); //<-here i get the error

    byte[] data = new byte[len];
    if (len > 0) {
        dis.readFully(data,0,len);
    }
    myByteArray=data;
    return data.length;
}

but I get the following error:

12-23 17:30:49.814: E/AndroidRuntime(11717):
java.lang.OutOfMemoryError: array size too large(Heap Size=5699KB,
Allocated=3403KB, Bitmap Size=78KB)

Answer 1

You probably get the OutOfMemoryError on the line below. (The line that allocates new memory using new.)

Print len before doing the allocation and you’ll probably see that it’s a huge number (a lot larger than what you expect).

Log.d("YOU_TAG", "len = " + len);

Presumably you don’t send the size of the byte array on the sending side. (Or if you do, your reading / writing has come out of sync.)