How do I check whether both parallel AsyncTask threads are finished

Question

I'm calling two AsyncTasks in parallel via this snippet in onCreate:

        if ((DictMode.equals("TATOEBA")) || (DictMode.equals("SENTENCE"))) {

            dictAsyncTask = new DictAsyncTask(DictionaryLookUp.this, "Tatoeba");
//            dictAsyncTask.execute();
            dictAsyncTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
        }

        if ((DictMode.equals("JUKUU")) || (DictMode.equals("SENTENCE"))) {

            dictAsyncTask = new DictAsyncTask(DictionaryLookUp.this, "Jukuu");
//            dictAsyncTask.execute();
            dictAsyncTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
        }

during onPostExecute I check whether any data gets retrieved and return from the startActivityForResult call via finish:

            if (alldictStuff.size() == 0) {

               ...

               Toast.makeText(DictionaryLookUp.this,"NOTHING FOUND ...",Toast.LENGTH_SHORT).show();

               if ((DictMode.equals("TATOEBA")) || (DictMode.equals("JUKUU")) || (DictMode.equals("SENTENCE"))) {

                    Intent intentCard = new Intent(getApplicationContext(), CardView.class);

                    setResult(Activity.RESULT_OK);

                    finish();
                }

but that's obviously flawed since I'm not checking whether both threads return no results, so what's the best way to check whether both threads are finished and returned nothing ? Do I have to use my own variables to track it or is there something neat/built-in I can utilize ?

score 0 · Answer 1 · answered Jul 06 '17 at 17:18

0

This is mainly how you want to manage your business logic. From your onPostExecute() either send intent or send broadcast message to main thread or maintain async task status list and mark finished for each task from onPostExecute().

answered Jul 06 '17 at 17:18

Sachin

501
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How do I check whether both parallel AsyncTask threads are finished

1 Answers1