CODEWITHSUNDEEP
androidandroid-asynctask
Jack
Jack

Reputation: 2053

Accessing String in AsyncTask from outer class

I have my Main Activity and in that Activity I have a private AsyncTask class. In my public AsyncTask class, there is a String I will need access that my MainActivity after my AsyncTask has finished.

How would I be able to access the String in my Async Task class from my Main Activity?

EDIT: I'm calling AsyncTask in the OnCreate of my Activity

Async Task class(Near bottom is the String I need):

public class getLikes extends AsyncTask<String, String, String> {

    JSONObject obj = null;


    @Override
    protected String doInBackground(String... params) {
        // TODO Auto-generated method stub

        try {
            String jsonUser = fb.request("5027904559");

            obj = Util.parseJson(jsonUser);


        } catch (FacebookError e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;

    }

    @Override
    protected void onPostExecute(String args) {
        // TODO Auto-generated method stub


     //I need to use this String elsewhere in my MainActivity
        String name = obj.optString("likes");




    }

}

Here is where I need to use the string(if it matters)

        navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons
            .getResourceId(0, -1), true, names));

Upvotes: 0

Views: 457

Answers (1)

bgoeschi
bgoeschi

Reputation: 145

Just make a constructor where you hand in an Observer like this one:

interface TaskCompletionObserver {
    taskCompleted(Object result)
}

The constructor would look like this:

public GetLikes(TaskCompletionObserver observer){
    super();
    this.mObserver = observer;
}

Then in the onPosteExecute simply call:

mObserver.taskCompleted(whatever_you_want_to_pass);

Your activity should then implement TaskCompletionObserver and in the implementation of taskCompleted you can do what you need to do (e.g. update the UI)

You could then lateron extend your implementation to a fully fedged observer patter

It's good design and keeps your code maintainable and flexible.

Upvotes: 2

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