public void startSearch() {
Log.d(TAG, "Start search.");
if (mStarted) {
Log.d(TAG, "startSearch() ignore, search is already started.");
return;
}
mStarted = true;
NetWorkUtil.acquireWifiMultiCastLock(mContext);
Thread searchThread = new Thread(this);
searchThread.start();
}
/** Leave broadcast group. */
private void leaveGroup(InetAddress groupAddr) {
try {
// leave broadcast group.
mReceiveSocket.leaveGroup(groupAddr);
} catch (Exception e) {
Log.e(TAG, "leave group fail. " + e.toString());
}
}
/** Join broadcast group. */
private void join(InetAddress groupAddr) {
try {
// Join broadcast group.
mReceiveSocket.joinGroup(groupAddr);
} catch (Exception e) {
Log.e(TAG, "Join group fail. " + e.toString());
}
}
public void stopSearch() {
Log.d(TAG, "Stop search");
mStarted = false;
mStopped = true;
leaveGroup(mMulticastAddress);
NetWorkUtil.releaseWifiMultiCastLock();
closeSocket();
mInstance = null;
}
@Override
public void run() {
try {
mReceiveSocket = new MulticastSocket(Search.MULTICAST_RECEIVE_PORT);
mReceiveSocket.setSoTimeout(Search.TIME_OUT);
mMulticastAddress = InetAddress.getByName(Search.MULTICAST_IP);
} catch (Exception e) {
Log.e(TAG, "Create mReceiveSocket fail." + e);
}
join(mMulticastAddress);
startListenServerMessage();
}
public void run() {
DatagramPacket inPacket;
while (!mStopped) {
try {
inPacket = new DatagramPacket(new byte[1024], 1024);
mReceiveSocket.receive(inPacket);
byte[] data = inPacket.getData();
SearchProtocol.decodeSearchLan(data, mListener);
} catch (Exception e) {
if (e instanceof SocketTimeoutException) {
// time out, search again.
Log.d(TAG, "GetPacket time out. search again.");
} else {
Log.e(TAG, "GetPacket error," + e.toString());
if (mListener != null) {
mListener.onSearchStop();
}
}
}
}
}