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POAsyncTask - Return a String in postExecute to the Activity, which started the Async Task without blocking the UI Thread
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copied!<p>I have an Activity, which starts an AsyncTask with an Implemented process dialog. That works fine! But i want to get a String return when the asyncTask has finished. So i have to return something in the onPostExecute - Method. That result(string) i want to grab in the Activity, which started the AsyncTask. I do not want to use .get() because it blocks the UI thread.</p> <p>What do i have to write into onPostExecute and the Activity grab the string from doInBackground?</p> <p>Thank you for any kind of help to solve this problem ;)</p> <p>Now with Code:</p> <pre><code>class BgDL extends AsyncTask<String, Integer, String> { String finishString=""; private Context context; ProgressDialog pdialog; public BgDL(Context cxt) { //get the context (usually "this" from Activity / otherwise progressdialog wont show up! context = cxt; pdialog = new ProgressDialog(context); } @Override protected String doInBackground(String... strings) { OutputStream output; ByteArrayOutputStream baos = null; try { URL url = new URL(strings[0]); URLConnection connection = url.openConnection(); connection.connect(); int fileLength = connection.getContentLength(); InputStream input = new BufferedInputStream(url.openStream()); if (strings[1]=="toString") { // write byte to string if a file is not given baos= new ByteArrayOutputStream(); output = new DataOutputStream(baos); } else { //otherwise to string output = new FileOutputStream(strings[1]); } byte data[] = new byte[1024]; long total = 0; int count; while ((count = input.read(data)) != -1) { total += count; publishProgress((int) (total * 100 / fileLength)); output.write(data, 0, count); } output.flush(); output.close(); input.close(); if (strings[1]=="toString") { finishString = baos.toString(); // } // only write byte to string if a file is not given } catch (Exception e) {log.d("ex",e.toString()); } return finishString; } @Override protected void onPreExecute() { super.onPreExecute(); pdialog.setTitle("Please wait"); pdialog.setIndeterminate(false); pdialog.setMax(100); pdialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); pdialog.show(); } @Override protected void onProgressUpdate(Integer... progress) { super.onProgressUpdate(progress); pdialog.setProgress(progress[0]); } protected void onPostExecute(String...finishString) { pdialog.dismiss();//!!!!!!!!!finishString i want to pass over to my Activity, which started this asynctask with .execute(); } </code></pre>

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