How to display contacts in Android using AsyncTask?

Question

I\'m trying to list all the contacts in mobile. So far everything was working fine, but when I thought of running my code in AsyncTask I\'m getting nothing on s

Answer 1

You can't touch views in Non-UI thread. You must set adapter in onPostExecute();

Use this: (Also, I hope that you keep your contacts somewhere, because I don't see contacts variable in your snippet)

new AsyncTask() 
{

    @Override
    protected void onPreExecute() 
    {
        pd = ProgressDialog.show(CallListActivity.this,
                "Loading..", "Please Wait", true, false);
    }// End of onPreExecute method

    @Override
    protected Void doInBackground(Void... params) 
    {
        getContacts();
        return null;
    }// End of doInBackground method

    @Override
    protected void onPostExecute(Void result)
    {
        arrayAdapter = new ArrayAdapter(CallListActivity.this, R.layout.display_contacts,R.id.tv_single_contact_number,displayContactName);
        lvCallList.setAdapter(new CustomAdapter(CallListActivity.this));
        pd.dismiss();

    }//End of onPostExecute method
}.execute((Void[]) null);