Problems in Calling AsyncTask from IntentService

Question

I have created `IntentService` class and performing `asyncTask` but getting exception when `onPreExecute()` is called at this code line `pDialog.show();` AsyncHandlerService Class --- ``` public class AsyncHandlerService extends IntentService{ ProgressDialog pDialog; HttpPost post; HttpResponse response; Context ctx; public AsyncHandlerService() { super("AsyncHandlerService"); ctx = this; } @Override protected void onHandleIntent(Intent intent) { new LoadDeviceInfo().execute(); } class LoadDeviceInfo extends AsyncTask<String, String, String> { @Override protected void onPreExecute() { super.onPreExecute(); pDialog = new ProgressDialog(ctx); pDialog.setMessage("Updating device info..."); pDialog.setIndeterminate(false); pDialog.setCancelable(false); pDialog.show(); //Exception here.. } protected String doInBackground(String... args) { } protected void onPostExecute(String file_url) { pDialog.dismiss(); } ``` UPDATE: I am calling the `IntentService` in the broadcast receiver that has th…

Accepted Answer

First, `IntentService` already uses a background thread. You do not need another background thread. Do the work that needs to be done in the background in `onHandleIntent()`.

Second, a `Service` cannot display a `Dialog`. Instead, let the UI layer of your app know that the work was done via a message on an event bus (e.g., `LocalBroadcastManager`, greenrobot's EventBus, Square's Otto). If the UI layer does not handle the event, your service can raise a `Notification` or otherwise let the user know about the work that was done, if that is needed.

Problems in Calling AsyncTask from IntentService

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