android - 线程是否停止执行并继续？这只是令人困惑

Question

我在代码中添加了日志只是为了了解它的执行顺序和时间，但到目前为止它只是令人困惑!

当我执行这段代码并启动服务器时，我得到了这些输出

---

"启动服务器", "ServerThread"

"监听", "服务器线程"

“连接到达”，“ServerThread”

---

然后停在那里，当我连接到服务器时，我只得到

---

“已接受连接”，“ServerThread”

---

就好像挂着一样

socket = serverSocket.accept();

难道不应该因为某种异常而退出尝试并再次打印整个内容吗？

class ServerThread implements Runnable {

    public void run() {
        Socket socket = null;
        try {
            Log.e("start server", "ServerThread");
            serverSocket = new ServerSocket(SERVERPORT);
        } catch (IOException e) {
            e.printStackTrace();
            Log.e("IO error at starting server", "ServerThread");
        } catch (Exception e) {
            Log.e("Exc at starting server", "ServerThread");
        }
        while (!Thread.currentThread().isInterrupted()) {
            Log.e("listening", "ServerThread");
            try {
                Log.e("connection arrived", "ServerThread");
                socket = serverSocket.accept();
                Log.e("connection accepted", "ServerThread");
                CommunicationThread commThread = new CommunicationThread(
                        socket);
                new Thread(commThread).start();

            } catch (IOException e) {
                e.printStackTrace();
                Log.e("IO error at accept", "ServerThread");
            } catch (Exception e) {
                Log.e("Exc at accept", "ServerThread");
            }
        }

    }
}

Answer 1

这是一个阻塞方法，它会阻塞直到你收到一个连接。

查看文档:http://docs.oracle.com/javase/7/docs/api/java/net/ServerSocket.html#accept()