How is asynctask used in an android application?

To avoid this we use android AsyncTask to perform the heavy tasks in background on a dedicated thread and passing the results back to the UI thread. Hence use of AsyncTask in android application keeps the UI thread responsive at all times. The basic methods used in an android AsyncTask class are defined below :
In respect to this, what are the methods of asynctask in Android?
AsyncTask has four methods that are triggered at different times during the life cycle of async task execution. PreExecute: This is invoked in UI thread before the AsyncTask is executed. We can show a ProgressBar or perform any UI related tasks in this method. doInBackground: The background execution code goes in this method.
Next, what does asynctask do on the background thread? Android AsyncTask going to do background operation on background thread and update on main thread. In android we cant directly touch background thread to main thread in android development. asynctask help us to make communication between background thread to main thread.
Just so, why do we use companion object in asynctask?
When non-static, they hold a reference to the Activity. So, if the AsyncTask exists till after the Activity’s lifecycle, it’ll keep a reference of the Activity thereby causing memory leaks. Hence companion object is used where we can store a weak reference of the Activity.
One may also ask, what are params and result in asynctask?
Params: The type of the parameters sent to the AsyncTask. Progress: The type of the progress units published during the background computation. Result: The type of the result of the background computation. AsyncTask has four methods that are triggered at different times during the life cycle of async task execution.

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