Why doesn't ServerSocket call NetworknOnMainThread while Socket does?
server = new ServerSocket(PORT);
does not throw NetworkOnMainThreadException in my application which I think should be doing and editing code to run on another thread until
socket= new Socket(ADDRESS,PORT);
indeed throws NetworkOnMainThreadException. Am I missing something or is this a bug that needs to be fixed?
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2 answers
When you call new Socket (ADDRESS, PORT),
private Socket(SocketAddress address, SocketAddress localAddr,
413 boolean stream) throws IOException {
414 setImpl();
415
416 // backward compatibility
417 if (address == null)
418 throw new NullPointerException();
419
420 try {
421 createImpl(stream);
422 if (localAddr != null)
423 bind(localAddr);
424 if (address != null)
425 connect(address);
426 } catch (IOException e) {
427 close();
428 throw e;
429 }
430 }
Creates a stream. whereasserver = new ServerSocket(PORT);
public ServerSocket(int port, int backlog, InetAddress bindAddr) throws IOException {
230 setImpl();
231 if (port < 0 || port > 0xFFFF)
232 throw new IllegalArgumentException(
233 "Port value out of range: " + port);
234 if (backlog < 1)
235 backlog = 50;
236 try {
237 bind(new InetSocketAddress(bindAddr, port), backlog);
238 } catch(SecurityException e) {
239 close();
240 throw e;
241 } catch(IOException e) {
242 close();
243 throw e;
244 }
245 }
NOTICE there is no connect();
, which does not cause any of these methods to be related to network operations, so you will not getNetworkOnMainThreadException
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