private Interfacestring Interfacestring;
private RequestQueue requestQueue;
private StringRequest request;
private Interfacestring execinterface;

String usuario, senha, result;

Context context;
Toast toast;

public MecanismoString (Context context, Interfacestring execinterface){
    this.context = context;
    this.Interfacestring = execinterface;
}




@Override
public String doInBackground(String... params) {

    Log.i("Script", "1 ->" + params[0]);
    Log.i("Script", "2 ->" + params[1]);
    Log.i("Script", "3 ->" + params[2]);
    Log.i("Script", "4 ->" + params[3]);

    usuario = params[2];
    senha = params[3];

    requestQueue = Volley.newRequestQueue(context);

    request = new StringRequest(Request.Method.POST, params[1], new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject jsonObject = new JSONObject(response);

                final String result = jsonObject.getString("perfil");


            } catch (JSONException e) {
                e.printStackTrace();
            }

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    }){
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            HashMap<String, String> hashMap = new HashMap<String, String>();
            hashMap.put("login", usuario);
            hashMap.put("senha", senha);

            return hashMap;
        }
    };

    requestQueue.add(request);

    return (result);
}


@Override
protected void onPostExecute(String result) {

    execinterface.carregarString(result);

}