使用connect命令进行HTTP连接

Question

http连接错误。在下面的代码中，conn.connect（）中存在错误；

在android，manifest.xml中我已经

    android:usesCleartextTraffic="true"

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    URL u = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) u.openConnection();
    conn.setRequestMethod("GET");
    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.connect();