Select all/any of the following methods, which are defined in the class android.os.Async Task and which when called (by the system not by the app-developer) run on the Main or UI Thread. Since these methods run on the Main or UI Thread they may consequently access and modify View objects/components, such as Buttons and Edit Text fields. onPreExecute( ), invoked before the task is executed. dolnBackground(params...) invoked immediately after on PreExecute() on ProgressUpdate(Progress...) invoked after a call to publishProgress(Progress...) This method is used to display any form of progress for long occuring tasks to the user. onPostExecute(Result) this method is invoked after doinBackground completes and is passed the return value from doinBackground as its argument