Proper use of AsyncTask

Question

I have a code like this:

In a Button Click I wrote this Code:

new Loadiing().execute();

It takes to the AsyncTask class That I created, My class Looks Like:

public class Loadiing extends AsyncTask<Void,Void,Void>{

        ProgressDialog d= new ProgressDialog(Main.this);
        @Override
        protected void onPreExecute() {
            // TODO Auto-generated method stub


            ProgressDialog.show(Main.this, "", "Loading");


        }



        @Override
        protected Void doInBackground(Void... params) {
            // TODO Auto-generated method stub
            **A method which returns some data in a arrayadapter and sets it;**
            return null;
        }


        @Override
        protected void onPostExecute(Void result) {
            // TODO Auto-generated method stub
            d.dismiss();

        }


    }

but it is just starting an alert dialog, nothing is done in the background and also the dialog is not being dismissed, what to do?

Answer 1

This should be,

d.show();

instead of, ProgressDialog.show(Main.this, "", "Loading");

Update: In your case,

    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
       d.setTitle("Loading");
       d.show();
     }