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POHow to handle isCancelled in AsyncTask
 

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    <p>I am trying to add this code to my <code>doInBackGround</code> so I can catch a flag that is being set when the user presses the back button </p> <pre><code>protected Long doInBackground(URL... urls) { int count = urls.length; long totalSize = 0; for (int i = 0; i &lt; count; i++) { totalSize += Downloader.downloadFile(urls[i]); publishProgress((int) ((i / (float) count) * 100)); // Escape early if cancel() is called if (isCancelled()) break; } return totalSize; } </code></pre> <p>This my <code>doInBackGround</code> and the code I use to set the flag for the asynctask to be canceled </p> <pre><code>@Override public void onBackPressed() { /** If user Pressed BackButton While Running Asynctask this will close the ASynctask. */ if (mTask != null &amp;&amp; mTask.getStatus() != AsyncTask.Status.FINISHED) { mTask.cancel(true); } super.onBackPressed(); finish(); } @Override protected void onDestroy() { // TODO Auto-generated method stub /** If Activity is Destroyed While Running Asynctask this will close the ASynctask. */ if (mTask != null &amp;&amp; mTask.getStatus() != AsyncTask.Status.FINISHED) { mTask.cancel(true); } super.onDestroy(); } @Override protected void onPause() { // TODO Auto-generated method stub if (pDialog != null) { if(pDialog.isShowing()) { pDialog.dismiss(); } super.onPause(); } } class LoadAllData extends AsyncTask&lt;String, String, String&gt; { protected String doInBackground(String... args) { try { Intent in = getIntent(); String searchTerm = in.getStringExtra("TAG_SEARCH"); String query = URLEncoder.encode(searchTerm, "utf-8"); String URL = "example.com"; JSONParsser jParser = new JSONParsser(); JSONObject json = jParser.readJSONFeed(URL); try { JSONArray questions = json.getJSONObject("all").getJSONArray("questions"); for(int i = 0; i &lt; questions.length(); i++) { JSONObject question = questions.getJSONObject(i); String Subject = question.getString(TAG_QUESTION_SUBJECT); String ChosenAnswer = question.getString(TAG_QUESTION_CHOSENANSWER); String Content = question.getString(TAG_QUESTION_CONTENT); </code></pre> <p>The problem comes when I try to translate <code>isCancelled</code> into my asynctask. I get an error under <code>Downloader</code> that says "<code>Downloader</code> cannot be resolved" I also get one under <code>publishProgress</code> that says "The method <code>publishProgress</code>(String...) in the type AsyncTask is not applicable for the argument (int)" I'm jus tasking is somebody can help put the <code>isCancelled</code> into my AsyncTask. I have also done my research and seen that there are more than one way to use <code>isCancelled</code> in your code. I have realized that dealing with <code>isCancelled</code> can really be a hassle for somebody new to it.</p>
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