Question

public class AycanClass extends AsyncTask<String, Void, String> implements IAppointments {

    Activity activity;

    public AycanClass(Activity activity){
        this.activity = activity;
    }

    @Override
    protected void onPostExecute(String result) {
           super.onPostExecute(result); 
           activity.setFilters(value);      
    }     
}

Now in my MainActivity class i have method like this.

public void setFilters(String result){

}

I am not able to call this method.

The method setFilters(result) is undefined for the type Activity

Answer 1

Edit: make your activity implement an interface that will contain that method.

public interface FilterableActivity {
 public void setFilters(String result);
}

And the activity should look like this:

public class MainActivity extends Activity implements FilterableActivity {

 ...
 public void setFilters(String result){

 }
}

And just pass a FilterableActivity as a parameter to the Asynctask.

public AycanClass(FilterableActivity activity){
    this.activity = activity;
}