public class MainActivity extends AppCompatActivity {

TextView mTextView;
EditText link;
EditText uname;
EditText pswd;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mTextView = (TextView) findViewById(R.id.showOutput);
    link = (EditText) findViewById(R.id.link);
    uname = (EditText) findViewById(R.id.uname);
    pswd = (EditText) findViewById(R.id.pswd);
}

public  void onPost(View view){
    try{
        URL url = new URL(link.getText().toString());
        HttpURLConnection connection =  (HttpURLConnection) url.openConnection();

        if(connection==null){
            return;
        }

        String urlParameters = "username="+uname.getText().toString()+"&password="+pswd.getText().toString()+"&4Tredir="+"http://192.168.10.16:1000/login?0321cfcf14eae73e"+"&magic="+"052dcdc515e9e149";
        connection.setRequestMethod("POST");
        connection.setRequestProperty("USER-AGENT","Mozilla/5.0");
        connection.setRequestProperty("ACCEPT-LANGUAGE","en-US,en;0.5");

        connection.setDoOutput(true);
        DataOutputStream dStream = new DataOutputStream(connection.getOutputStream());

        if(dStream!=null) {

            dStream.writeBytes(urlParameters);
            dStream.flush();
            dStream.close();


            int responseCode = connection.getResponseCode();
            String output = "Request URL " + url;
            output += System.getProperty("line.separator") + "Request Parameters" + urlParameters;
            output += System.getProperty("line.separator") + "Response code" + responseCode;

            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line = "";
            StringBuilder responseOutput = new StringBuilder();

            while ((line = br.readLine()) != null) {
                responseOutput.append(line);
            }
            br.close();

            output += System.getProperty("line.separator") + responseOutput.toString();
            mTextView.setText(output);

        }
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e){
        e.printStackTrace();
    }
}

public void Login(View view){
    // Instantiate the RequestQueue.
    RequestQueue queue = Volley.newRequestQueue(this);
    String url =link.getText().toString();

    mTextView.setText("CHECKING.....!!!");

    // Request a string response from the provided URL.
    StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            mTextView.setText(response.toString());
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            mTextView.setText("That didn't work!!!  "+error.getMessage());
        }
    })
    {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<String, String>();
            params.put("username",uname.getText().toString());
            params.put("password",pswd.getText().toString());
            params.put("4Tredir","http://192.168.10.16:1000/login?0321cfcf14eae73e");
            params.put("magic","052dcdc515e9e149");
            params.put("","");
            //params.put("submit","SUBMIT");

            return params;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> params = new HashMap<String, String>();
            params.put("Content-Type", "application/x-www-form-urlencoded");
            return params;
        }
    };

    // Add the request to the RequestQueue.
    queue.add(stringRequest);
}