Why does AsyncTask run in the main Thread of an application?

Question

in my application, I have a class for UI stuff, the name of which is \"SettingActivity\".

Then for doing some jobs in background, I bind this UI class(SettingActivi

Answer 1

In fact, I have checked the doc of android, onPreExecute(), onProgressUpdate(Progress...) and onPostExecute(Result) are all "invoked on the UI thread".

Only the doInBackground(Params...) method is "invoked on the background thread".