I am trying to write a simple android chat app. I have created a service class which handles all the networking communication. The DatagramSocket binding is in a separate thread. Once in while I am getting this error and the app crashes:
java.net.BindException: bind failed: EADDRINUSE (Address already in use)
at libcore.io.IoBridge.bind(IoBridge.java:89)
at java.net.PlainDatagramSocketImpl.bind(PlainDatagramSocketImpl.java:68)
at java.net.DatagramSocket.createSocket(DatagramSocket.java:133)
at java.net.DatagramSocket.<init>(DatagramSocket.java:78)
and this is the code which prodruces it. The error occur on the line with new DatagramSocket How can I avoid this error? Thank you.
private class ComThread extends Thread {
private static final int BCAST_PORT = 8779;
DatagramSocket mSocket;
InetAddress myBcastIP, myLocalIP;
public ComThread() {
try {
myBcastIP = getBroadcastAddress();
if (D)
Log.d(TAG, "my bcast ip : " + myBcastIP);
myLocalIP = getLocalAddress();
if (D)
Log.d(TAG, "my local ip : " + myLocalIP);
if (mSocket == null) {
mSocket = new DatagramSocket(BCAST_PORT);
mSocket.setReuseAddress(true);
mSocket.setBroadcast(true);
}
} catch (IOException e) {
Log.e(TAG, "Could not make socket", e);
}
}
Since Sean asked for the code, I have translated Nikola's answer to the following code, which is similar to what I am using in my app, in case it is useful:
if (mSocket == null) {
mSocket = new DatagramSocket(null);
mSocket.setReuseAddress(true);
mSocket.setBroadcast(true);
mSocket.bind(new InetSocketAddress(BCAST_PORT));
}