Android, can I put AsyncTask in a separate class and have a callback?

Question

I\'m just learning about AsyncTask and want to use it as a separate class, rather then a subclass.

For example,

class inetloader extends AsyncTask&l         


        

Answer 1

inetloader il = new inetloader();
il.execute("http://www.google.com");

String result = il.get();//put it in try-catch
                ^^^^^^^^ 

here you get result which is in onPostExecute(String result)

Answer 2

you can pass the activity instance to constructor and call activity function from there...
Like use interface :

public interface ResultUpdatable {

   public void setResult(Object obj);
   }

Implement this in the Activity and pass in the constructor of Async task and update the result from onPostExecute using setResult function.

Answer 3

Use a interface. Something like:

interface CallBackListener{
  public void callback();
}

Then do this in your UI thread:

inetloader il = new inetloader();
li.setListener(this);
il.execute("http://www.google.com");

In inetloader, add:

   CallBackListener mListener;

   public void setListener(CallBackListener listener){
     mListener = listener;
   }

then In postExecute(), do:

   mListener.callback();