Android AsyncTask refers to an abstract class that happens to be provided by an android application system granting the user the ability to complicated tasks in the background. AsyncTask keeps the UI running hence the application remains responsive throughout the codding process.
Android applications are said to run on a single thread after being launched. As a result, the task handled by the thread is much and might take longer for the application to give a response. Therefore, Android AsyncTask comes in to fasten the process. Indeed, it acts as a catalyst in heavy tasks by sending processed results back to the UI thread in a short period of time.
Android AsyncTask Structure
Asynctask structure constitutes of four major components or rather abstract methods that combine to form asynctask class. To begin with is the dolnBackground() method that contains all the codes which are executed in the background. This method allows the user to send responses as many times as possible to the UI thread by the help of publish progress method. It provides a statement to notify the user that background processing is complete and the returns are ready for use.
The second component is the onPreExecute() method that has a code which undergoes execution before the background processing begins. Thirdly, Android AsyncTask has an onPostExecute() handles the results coming from the background processing after stage one. Finally, its structure is closed up by onProgressUpdate() abstract method that helps in receiving all the updates coming from the background and then publishing them by the help of publish progress method. This method still appears to be relevant when it comes to updating the UI thread.
The three primary generic types commonly used in the Android AsyncTask structure include but not limited to params, progress as well as results. Ultimately, starting up an AsyncTask requires the presence of a snippet in the major activity.