CODEWITHSUNDEEP
javaandroidandroid-asynctaskjsoup
Nirmal Gamage
Nirmal Gamage

Reputation: 177

Doing something after AsyncTask finishes

I am developing an android application which uses Jsoup to retrieve web content. To execute this, I am using separate AsyncTask classes. I need to show the retrieved results after the finish of AsyncTasks. The doInBackground method stores retrieved data into an Array.

ScheduleExtractor scheduleExtractor = new ScheduleExtractor();
scheduleExtractor.execute();

if(myArray.length==0){
   ///
}else{
   //show results
}

However, when I try to access the array after calling the method Asynctask.execute(), the array has no elements. So, is there a way to make sure that the access to the array happens after finishing the AsyncTask method? Thank you.

Upvotes: 0

Views: 40

Answers (1)

Sdghasemi
Sdghasemi

Reputation: 5598

AsyncTasks as the name represents do you job asynchronous, meaning that the call to execute() starts the process in a different thread while the rest of your code keeps on running on your own thread right after calling execute().

If you expect your AsyncTask to have a final result you should override onPostExecute(Result) method and check the length of your array there. Here is a simple example (assuming the final result type is int[]:

class ScheduleExtractor extends AsyncTask<Void, Void, int[]> {
    @Override
    protected int[] doInBackground(Void... params) {
        // Process your retrieved data and return the result here
    }

    @Override
    protected void onPostExecute(int[] arrayResult) {
        if(arrayResult.length==0) {
            // Your code here
        } else {
            // Show results
        }
    }
}

Upvotes: 1

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