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java.net.ProtocolException: Unexpected status line: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.http.StatusLine.parse(StatusLine.java:54)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:191)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:80)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:905)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:789)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:443)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:388)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:231)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at it.codesnippet.dots.LoginActivity$1$override.run(LoginActivity.java:49)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at it.codesnippet.dots.LoginActivity$1$override.access$dispatch(LoginActivity.java)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at it.codesnippet.dots.LoginActivity$1.run(LoginActivity.java:0)
07-10 11:18:54.112 24683-25081/it.codesnippet.dots W/System.err:     at java.lang.Thread.run(Thread.java:818)

Thread loginCheckThread = new Thread(new Runnable() {
    public void run() {
        String result = "", dataObj = "";
        TextView username = (TextView) findViewById(R.id.login_mail);
        TextView password = (TextView) findViewById(R.id.login_password);

        JSONObject jsonObj = new JSONObject();
        try {
            jsonObj.put("loginMail", username.getText());
            jsonObj.put("loginPassword", password.getText());
            dataObj = jsonObj.toString(0);
        } catch (JSONException e) {
            e.printStackTrace();
        }

        try {
            URL url = new URL("http://myserver.it/testandroid.php?data=" + dataObj);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

            try {
/* line #49 */  InputStream in = new BufferedInputStream(urlConnection.getInputStream());
                ByteArrayOutputStream bo = new ByteArrayOutputStream();
                int i = in.read();
                while (i != -1) {
                    bo.write(i);
                    i = in.read();
                }
                result = bo.toString();
            } catch (IOException e) {
                result = "Exception: Class::IOStream Related";
                e.printStackTrace();

            } finally {
                urlConnection.disconnect();
            }
        } catch (IOException e) {
            result = "Exception: Class::URL Related";
        }

        System.out.println(result);
    }
});
loginCheckThread.start();

InputStream in = new BufferedInputStream(urlConnection.getInputStream());

$jsonObj = json_decode($_GET["data"], TRUE);

echo $jsonObj["loginMail"] . " - " . $jsonObj["loginPassword"];

HTTP/1.1 200 OK
Date: Sun, 10 Jul 2016 10:02:42 GMT
Content-Type: text/html
Content-Length: 6920
Last-Modified: Sun, 10 Jul 2016 04:00:22 GMT
Connection: keep-alive
Accept-Ranges: bytes

Here goes the content.

java.net.ProtocolException: Unexpected status line: <!DOCTYPE HTML PUBLIC “-//IETF//DTD HTML 2.0//EN”>