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Which method is used to perform background tasks in Android and update the UI on the main thread?AAsyncTaskBIntentServiceCHandlerThreadDJobIntentSe

Question

Which method is used to perform background tasks in Android and update the UI on the main thread?

A. AsyncTask
B. IntentService
C. HandlerThread
D. JobIntentService

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Solution

The method used to perform background tasks in Android and update the UI on the main thread is AsyncTask.

Here's a step-by-step explanation:

  1. AsyncTask is a class in Android that allows us to perform long background operations and show the result on the UI thread without affecting the main thread.

  2. It has four steps: onPreExecute, doInBackground, onProgressUpdate, and onPostExecute.

  3. onPreExecute: This method contains the code which is executed before the background processing starts.

  4. doInBackground: This method contains the code which needs to be executed in the background. It is used to perform background computation that can take a long time.

  5. onProgressUpdate: This method is called after doInBackground method completes processing. It's used to update the progress bar in the UI thread.

  6. onPostExecute: This method is called after all the background processing has been done. It is used to update the UI thread after completion of the background task.

So, the correct answer is A: AsyncTask.

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