if (cd.isConnected()) {

        final String username = etusuario.getText().toString();
        final String password = etpassword.getText().toString();

        Response.Listener<String> respoListener = new Response.Listener<String>() {

            @Override
            public void onResponse(String response) {

                try {
                    JSONObject jsonResponse = new JSONObject(response);
                    boolean success = jsonResponse.getBoolean("success");

                    if (success) {
                        String nombre = jsonResponse.getString("name");
                        String apellido = jsonResponse.getString("surname");
                        int brigada = jsonResponse.getInt("brigada");

                        Intent intent = new Intent(Logon.this, Opciones.class);
                        intent.putExtra("nombre", nombre);
                        intent.putExtra("apellido", apellido);
                        intent.putExtra("usuario", username);
                        intent.putExtra("brigada", brigada);

                        Logon.this.startActivity(intent);
                    } else {

                        AlertDialog.Builder builder = new AlertDialog.Builder(Logon.this);
                        builder.setMessage("Error en usuario o password")
                                .setNegativeButton("Reintentar", null)
                                .create().show();
                    }

                } catch (JSONException e) {
                    Toast.makeText(getApplicationContext(), "Error JSON", Toast.LENGTH_SHORT).show();
                    e.printStackTrace();
                }
            }
        };

        LogonRequest logonRequest = new LogonRequest(username, password, respoListener);
        RequestQueue queue = Volley.newRequestQueue(Logon.this);
        queue.add(logonRequest);

private static final String LOGON_REQUEST_URL= Constant.RUTA_WEB + "appLogon.php";//"http://192.168.0.15/ConnBD_Android/appLogon.php";
private Map<String,String> params;
public LogonRequest(String username, String password, Response.Listener<String> listener){
    super(Method.POST, LOGON_REQUEST_URL, listener, null);
    params=new HashMap<>();
    params.put("username",username);
    params.put("password",password);


}


@Override
public Map<String, String> getParams() {
    return params;
}

//public static final String RUTA_WEB    = "http://192.168.17.74/ConnBD_Android/";
public static final String RUTA_WEB    = "https://10.10.12.94/obras/CONNBD_ANDROID/";