Activity's UI freezes on AsyncTask's onPostExecute?

Question

I used AsyncTask to request for a large chunk of data. When received, the data is processed inside the onPostExecute method. It may take a while to process the data.

Based from my understanding, AsyncTask is asynchronous and is independent from the UI.

• Why does my Activity freezes onPostExecute?
• Is it normal for an Activity to freeze if processing inside the onPostExecute method is too long?
• How do I make it such that my Activity won't freeze onPostExecute?

Answer 1

1. You should do all your datasource operations like(database , network ,parsing the response.etc) in doInBackground method.
2. If you want update any ui updation in async task the use onProgressUpdate
3. I think you are performing any parsing operations in onPostExecute. try getting filtered or parsed data (lighter data) in onPostExecute.