On Android, make a POST request with URL Encoded Form data without using UrlEncodedFormEntity

If you don’t mind using an HttpURLConnection instead of the (recommended) HttpClient then you could do it this way:

public void performPost(String encodedData) {
    HttpURLConnection urlc = null;
    OutputStreamWriter out = null;
    DataOutputStream dataout = null;
    BufferedReader in = null;
    try {
        URL url = new URL(URL_LOGIN_SUBMIT);
        urlc = (HttpURLConnection) url.openConnection();
        urlc.setRequestMethod("POST");
        urlc.setDoOutput(true);
        urlc.setDoInput(true);
        urlc.setUseCaches(false);
        urlc.setAllowUserInteraction(false);
        urlc.setRequestProperty(HEADER_USER_AGENT, HEADER_USER_AGENT_VALUE);
        urlc.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        dataout = new DataOutputStream(urlc.getOutputStream());
        // perform POST operation
        dataout.writeBytes(encodedData);
        int responseCode = urlc.getResponseCode();
        in = new BufferedReader(new InputStreamReader(urlc.getInputStream()),8096);
        String response;
        // write html to System.out for debug
        while ((response = in.readLine()) != null) {
            System.out.println(response);
        }
        in.close();
    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}