I am new to android development. I have a AsyncTask function in my application. Calling http request from all activities. Now in each activity I am using the following class to connect to server, in some activities I even called twice !!.

Basically I am a web developer and in such cases we use a single class which can be accessed from entire application(web) and use the common function to do the same activity. The only difference is input and out put will be changed.

My doubt is in this case can I use ( convert) this to such a function or class ? 
My assume is 

1. Create an android class ( which can be accessed from all the activities )
2. Just make the JSON string we need with specific server ( for process in server )
3. Just pass the created json to the created class and then made the http connect )
4. Process the returned data from server
5. Pass that to the corresponding activity

So that I can use the same function for all the activities and I can avoid duplicate query

Can I convert this code to such a manner ?

**My Code**

```
public class MainActivity extends Activity {

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

                LogIN loginUser = new LogIN();
        LoginUser.execute("");

}

         private class LogIN extends AsyncTask<String, Integer, String> {

        @Override
        protected String doInBackground(String... sUrl) {
            try {

        String path = "http://www.domain_name.com/app/checkSession.php";

        HttpClient client = new DefaultHttpClient();
        HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); 

                HttpResponse response;
                JSONObject json = new JSONObject();
                try {
                    HttpPost post = new HttpPost(path);
                    json.put("access_token", "123456");

                    post.setHeader("json", json.toString());
                    StringEntity se = new StringEntity(json.toString());
                    se.setContentEncoding((Header) new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
                    post.setEntity(se);

              response = client.execute(post);
                    /* Checking response */
                    if (response != null) {
                        InputStream in = response.getEntity().getContent(); 

                        String a = convertStreamToString(in);

                        JSONObject jsono = stringToJsonobj(a);
                        String passedStringValue = jsono.getString("result");

                        if(passedStringValue.equals("1")){
                            flags=1;
                            //Log.v("TAGG", "Success");
                        }
                        else {
                            flags=0;
                            //Log.v("TAGG", "Failed !");
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

            } catch (Exception e) {
            }
            return null;
        }

        @Override
        protected void onPreExecute() {

            super.onPreExecute();
            showDialogue("Login Processing", "Loading");
        }

        @Override
        protected void onProgressUpdate(Integer... progress) {
            super.onProgressUpdate(progress);
        }

        @Override
        protected void onPostExecute(String result) {
            if(flags.equals(1)){
            Itent homepage = new Intent(MainActivity.this, RegisterDevice.class);
            startActivity(homepage);
            finish();
            }
            else {
                Intent homepage = new Intent(MainActivity.this, LoginActivity.class);
                startActivity(homepage);
                finish();
            }
            super.onPostExecute(result);
        }

    }

}

```

Please any one help/advise 
Thanks in advance