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Android Application Development Tutorial - 102 - The 4 AsyncTask Methods Video Lecture | Android Application Development (Mobile App) - Software Development

FAQs on Android Application Development Tutorial - 102 - The 4 AsyncTask Methods Video Lecture - Android Application Development (Mobile App) - Software Development

1. What are the four AsyncTask methods used in Android application development?

Ans. The four AsyncTask methods used in Android application development are: 1. onPreExecute(): This method is executed before the background task starts and is used for setting up any necessary pre-execution configurations. 2. doInBackground(): This method is responsible for performing the actual background task, such as network operations or database queries. It runs on a separate thread. 3. onProgressUpdate(): This method is called during the background execution using publishProgress() method. It can be used to update the UI with the progress of the background task. 4. onPostExecute(): This method is executed after the background task is completed. It is used to handle the results of the background task and update the UI accordingly.

2. What is the purpose of the onPreExecute() method in AsyncTask?

Ans. The onPreExecute() method in AsyncTask is used to perform any necessary setup or configuration before the background task starts executing. It runs on the main UI thread and is commonly used to initialize UI components, show progress dialogs, or set up any necessary variables before the background task begins.

3. How is the doInBackground() method used in AsyncTask?

Ans. The doInBackground() method in AsyncTask is where the actual background task is performed. It runs on a separate thread, allowing long-running operations to be executed without blocking the main UI thread. This method is responsible for any network operations, database queries, or other time-consuming tasks. It receives parameters passed from the execute() method and returns the result of the background task.

4. When is the onProgressUpdate() method called in AsyncTask?

Ans. The onProgressUpdate() method in AsyncTask is called during the background task execution using the publishProgress() method. It is typically used to update the UI with the progress of the background task. For example, it can be used to update a progress bar or display a status message indicating the progress of the task. This method runs on the main UI thread, allowing direct manipulation of UI components.

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Sep 23, 2025 Last updated

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