Be sure to set the ConnectTimeout property for HttpURLConnection to prevent the connection from being blocked

You need to append a timeout setting to the connection code by appending a time-out period with the following Setup code:

Conn.setconnecttimeout (3000);

At this point, we set the time-out to 3 seconds, if not connected within 3 seconds is considered to be an error occurred, thus effectively avoiding the problem of different blocking of the URL. And, this time only refers to the time to set up the socket, not the time to send the data and data transfer

Conn.setreadtimeout (3000);//has established a link to the response time, I tested, set an invalid

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Be sure to set the ConnectTimeout property for HttpURLConnection to prevent the connection from being blocked