My way of doing same HTTP requests multiple times

reusableHttpRequest.java

public class SignIn extends AsyncTask<String, Void, String> {
    private static final String TAG = "SignIn";

    String email;
    String password;


    //outputs
    User user;
    boolean successStatus=false;
    String message = "Failed";


    public interface OnPostExecuteListener{
        void onTaskDOne(boolean status, String message , User user);
    }

    SignIn.OnPostExecuteListener onPostExecuteListener;

    public SignIn(String email,String password, SignIn.OnPostExecuteListener onPostExecuteListener) {
        this.onPostExecuteListener = onPostExecuteListener;
        this.email=email;
        this.password=password;
    }

    public void getDetails() {
        String result=null, line=null;
        InputStream is = null;
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("email", email));
        nameValuePairs.add(new BasicNameValuePair("password", password));


        try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://arifullahjan.com/api/signIn.php");
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();
            is = entity.getContent();
        } catch (Exception e) {
            Log.d("Fail 1", e.toString());
        }



        try {
            BufferedReader reader = new BufferedReader
                    (new InputStreamReader(is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();

            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            result = sb.toString();
            Log.d(TAG,result);
        } catch (Exception e) {
            Log.d("Fail 2", e.toString());
        }

        try {

            final JSONObject responseObject = new JSONObject(result);
            message = responseObject.getString("message");
            if (Integer.parseInt(responseObject.getString("success_status")) == 1){
                successStatus=true;
                JSONObject userObject = responseObject.getJSONObject("user");
                Gson gson = new Gson();
                user = gson.fromJson(userObject.toString(),User.class);

            }
        } catch (Exception e) {
            Log.d("Fail 3", e.toString());
        }
    }



    @Override
    protected String doInBackground(String... params) {
        getDetails();
        return null;
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        if(onPostExecuteListener==null)return;
        onPostExecuteListener.onTaskDOne(successStatus,message,user);
    }
}


USAGE
public class Test{

    //assume we have email and password
    void SignIn(){
          new SignIn(email, password, new SignIn.OnPostExecuteListener() {
                        @Override
                        public void onTaskDOne(boolean status,String password, final User user) {

                            if (status) {//if signin succeeded
                                runOnUiThread(new Runnable() {
                                    @Override
                                    public void run() {
                                        loginSuccess(user);
                                    }
                                });
                            } else {
                                runOnUiThread(new Runnable() {
                                    @Override
                                    public void run() {
                                        error_text_view.setVisibility(View.VISIBLE);
                                        error_text_view.startAnimation(AnimationUtils.loadAnimation(SignInActivity.this, android.R.anim.fade_in));
                                        progressHide();

                                    }
                                });
                            }
                        }
                    }).execute("");
    }


}