Не передается POST запрос

public class MainActivity extends AppCompatActivity {
 
    Button btnSendMsg;
    EditText textField;
    TextView textView;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        btnSendMsg = (Button) findViewById(R.id.buttonSend);
        textField = (EditText) findViewById(R.id.editText);
        textView = (TextView) findViewById(R.id.textView);
        textView.setMovementMethod(new ScrollingMovementMethod());
        try {
            postData();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    public void postData() throws IOException {
        URL url = new URL("http://192.168.43.199/andr/request.php");
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
        conn.setReadTimeout(10000);
        conn.setConnectTimeout(15000);
        conn.setRequestMethod("POST");
        conn.setDoInput(true);
        conn.setDoOutput(true);
        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
        writer.write(getQuery("asdasd"));
        writer.flush();
        writer.close();
        conn.connect();
    }
 
    private String getQuery(String params) throws UnsupportedEncodingException {
        StringBuilder result = new StringBuilder();
        result.append(URLEncoder.encode("qwe", "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(params, "UTF-8"));
        return result.toString();
    }
}