你有没有做任何研究吗？在默认设置进行了详细的文档。以下是有关部分：

Did you do any research? The defaults are detailed in the documentation. Here's the relevant parts:

公共无效setConnectTimeout（INT超时）自：API级别1

public void setConnectTimeout (int timeout) Since: API Level 1

设定以毫秒为单位的超时值用于建立连接   要指出此URLConnection实例的资源。一个   SocketTimeoutException如果被抛出，如果连接不能   建立在这个时候。 默认为0，表示无限   暂停。

Sets the timeout value in milliseconds for establishing the connection to the resource pointed by this URLConnection instance. A SocketTimeoutException is thrown if the connection could not be established in this time. Default is 0 which stands for an infinite timeout.

公共无效setReadTimeout（INT超时）自：API级别1

public void setReadTimeout (int timeout) Since: API Level 1

设定在毫秒的超时值用于从输入读出   已建立的连接到资源的流。一个   SocketTimeoutException如果被抛出，如果连接不能   建立在这个时候。 默认为0，表示无限   暂停。

Sets the timeout value in milliseconds for reading from the input stream of an established connection to the resource. A SocketTimeoutException is thrown if the connection could not be established in this time. Default is 0 which stands for an infinite timeout.

也有是有这样一个字条超时：

Also there is this note on timeouts:

URLConnection的支持两个超时：连接超时和   读取超时。默认情况下，操作永不超时。

URLConnection supports two timeouts: a connect timeout and a read timeout. By default, operations never time out.

这可能是可能的，你正在连接的服务器超时客户端。

It might be possible that the server you are connecting to is timing out your client.