HttpURLConnection with JSON on Android 9, API 28

Question

I'm trying to use HttpURLConnection in Android 9, API 28. It works on Android 8.0.0, API 26, but not on API 28.

            JSONObject jsonObject = new JSONObject();
            jsonObject.accumulate("name", name);
            String json = jsonObject.toString();

            URL url = new URL("http://website_link");
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setDoOutput(true);
            urlConnection.setRequestMethod("POST");
            urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");

            OutputStream os = urlConnection.getOutputStream();
            os.write(json.getBytes("UTF-8"));
            os.close();

            InputStream inputStream = new BufferedInputStream(urlConnection.getInputStream());
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("utf-8")), 8);
            String line;
            json = "";

            while ((line = reader.readLine()) != null) {
                json += line;
            }

            inputStream.close();

            jsonObject = new JSONObject(json);

            inputStream.close();
            urlConnection.disconnect();

            ...

I tried to use Log.d to see what code is not executed and I saw that it stops on OutputStream os = urlConnection.getOutputStream();

Do you know where is the problem?

As I wrote it stops on OutputStream os = urlConnection.getOutputStream();. That part is not executed and nothing happens, app doesn't crash, just that part is not executed. — user3566569, Mar 28 '19 at 13:09

Hasan Kucuk · Accepted Answer · 2019-07-05T11:52:43.050

1

Try this add Manifest.xml

cleartextTrafficPermitted="true"

it look like this How to allow all Network connection types HTTP and HTTPS in Android (9) Pie?

edited Jul 05 '19 at 11:52

answered Mar 27 '19 at 21:43

Hasan Kucuk

2,433
6
19
41

Thank you, I added android:usesCleartextTraffic="true" in application tag inside AndroidManifest.xml and it works! – user3566569 Mar 27 '19 at 22:04
i have error with importing these library how to resolve this HTTPurlConnection not found – Sunil Chaudhary Sep 17 '19 at 07:13

score 0 · Answer 2 · answered Mar 27 '19 at 22:15

0

This is because of Apache HTTP client depreciation , So add the below line in tag.

<uses-library android:name="org.apache.http.legacy" android:required="false"/>

answered Mar 27 '19 at 22:15

Saurav Kumar

891
8
14

I tried to add that tag and it didn't worked. Solution by Hasan Kucuk to add cleartextTrafficPermitted="true" worked. – user3566569 Mar 27 '19 at 22:20

HttpURLConnection with JSON on Android 9, API 28

2 Answers2