Question

I have an activity, composed of an AsyncTask aiming to launch a request when the user clicks on the button. I have been looking for answers, but I didn’t find the same problem, or it didn’t the same for me. The code is doing what I want, but the ProgressDialog looks blocked as the spinner is not turning sometimes (almost all the time).

When I click on the button :

AsyncTask is launched -> showDialog() is called onPreExecute -> startSearch ( SearchManager launches a new AsyncTask with in the doInBackground there is a heavy call with network ) -> doInBackground in Activity waits for SearchManager to be loaded -> display.

Code for button :

button_search.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                new SearchTask().execute();

            }
        });

Code for AsyncTask in Search Activity :

private class SearchTask extends AsyncTask<Void,Void,Void>{

        @Override
        protected void onPreExecute(){
            showDialog(DIALOG_LOADING_ID);

            searchManager.startSearch();
        }

        @Override
        protected Void doInBackground(Void... params) {


            while(searchManager.isLoading()){
                try {Thread.sleep(150);} catch(Exception e){};
            }


            return null;
        }

        @Override
        protected void onPostExecute(Void ret){
            try {dismissDialog(DIALOG_LOADING_ID);} catch (Exception e){};

            if ( searchManager.errorOccurred() ){
                //Error
            } else {
                //No Error

            }   
        }

Code for SearchManagerAsyncTask : which is directly launched by startSearch

protected class SearchAsync extends AsyncTask <Void,Void,Void>{

        @Override
        protected Void doInBackground(ComSearchAds... datas) {
            global.getDataManager().doSearch();
                        //... When finished
                        setIs_loading(false);
                }
}

I’m apparently doing something wrong, but can’t find what and how to avoid this. Thanks for your help !

SOLUTION :

Finally, it appears that the not spinning ProgressDialog was because I was using the same instance of ProgressDialog and

showDialog(DIALOG_LOADING_ID); 
//doInBackground
dismissDialog(DIALOG_LOADING_ID);

used with causes problem, I changed to

removeDialog(DIALOG_LOADING_ID)

and now it’s working fine.

Thanks All, and hope it can help someone someday !

Answer 1

You don’t need to create another task , just instead of doing the search stuff via another activity.

all you need to do is to put you search cod ein doInbackGround() of search task. e.g

@Override
protected Void doInBackground(Void... params) {

    global.getDataManager().doSearch();
    return null;
}

also use class level variable to get search result to store true/false

@Override
        protected void onPostExecute(Void ret){

            // Set you result here
            setIs_loading(my_searh_result);

            try {dismissDialog(DIALOG_LOADING_ID);} catch (Exception e){};

            if ( searchManager.errorOccurred() ){
                //Error
            } else {
                //No Error

            }   
        }