Cant read api link in android, kotlin, async

Issue

I try to read info form my API: http://localhost:5001/Subject => In android: http://10.0.2.2:5001/Subject. And my app has crash. (App work with another link APIrestfull in Internet)

inner class API : AsyncTask<String, Void, String>(){
    override fun doInBackground(vararg p0: String?): String {
        var content = StringBuilder();
        val url = URL(p0[0]);
        var urlConnection = url.openConnection() as HttpURLConnection;
        val inputStreamReader = InputStreamReader(urlConnection.getInputStream());
        val bufferedReader = BufferedReader(inputStreamReader);
        var line = "";

        try {
            do{
                line=bufferedReader.readLine();
                if (line!=null) content.append(line);
            } while (line!= null);
            bufferedReader.close();
        } catch (e : Exception) {
            Log.d("AAA",e.toString());
        }
        return content.toString();
    }

    override fun onPostExecute(result: String) {
        super.onPostExecute(result)
        Toast.makeText(applicationContext, "${result.toString()}", Toast.LENGTH_LONG).show();
    }

}

My api is asp.net core webapi.

Error: My error

Solution

This is the way to fix it: (Thanks all)

if (conn instanceof HttpsURLConnection) {
    HttpsURLConnection httpsConn = (HttpsURLConnection) conn;
    httpsConn.setSSLSocketFactory(SSLCertificateSocketFactory.getInsecure(0, null));
    httpsConn.setHostnameVerifier(new AllowAllHostnameVerifier());
}

Answered By - Huy Loc Vu