I think the easy way to resolve it is create a service which always are running and notifying to the activity, this service should run a thread to check periodically the data from the web service.
public class ViewSlideService extends Service { public static final String TAG = "ViewSlideService"; Updater updater; private final int DELAY = 3000; private boolean isRunning = false; Messenger outMessenger; @Override public void onCreate() { super.onCreate(); updater = new Updater(); Log.v(TAG, "onCreate"); } @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); Log.v(TAG, "onStart"); licenseSeat = QwizdomCommon.licenseSeat; isRunning = true; updater.start(); } @Override public void onDestroy() { super.onDestroy(); isRunning = false; updater.interrupt(); updater = null; // QwizdomWS.releaseSessionSeat(QwizdomCommon.licenseSeat.getSeatKey()); // May be to finish we must release the session seat. Log.v(TAG, "onDestroy"); } @Override public IBinder onBind(Intent intent) { Log.v(TAG, "onBind"); Bundle extras = intent.getExtras(); if (extras != null) { outMessenger = (Messenger) extras.get("MESSENGER"); } return null; } private class Updater extends Thread { @Override public void run() { super.run(); while (isRunning) { UpdateResult update; try { //Get data from web service Thread.sleep(DELAY); } catch (Exception e1) { e1.printStackTrace(); } } } } } you can see this link for more info about how create a service: http://stackoverflow.com/questions/4300291/example-communication-between-activity-and-service-using-messaging El miércoles, 21 de noviembre de 2012 10:40:03 UTC-8, Antonis Kanaris escribió: > > Hello.I am new developer android and i want to make an application read > data from my webserver and control my arduino board... > I start with this example .....for get data...ok work but only when click > button....i want to convert to automatic update.How i make this?. > > public class ReadWebpageAsyncTask extends Activity { > private TextView textView; > > > /** Called when the activity is first created. */ > > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.activity_read_webpage_async_task); > textView = (TextView) findViewById(R.id.textView1); > } > > private class DownloadWebPageTask extends AsyncTask<String, Void, > String> { > @Override > protected String doInBackground(String... urls) { > String response = ""; > for (String url : urls) { > DefaultHttpClient client = new DefaultHttpClient(); > HttpGet httpGet = new HttpGet(url); > try { > HttpResponse execute = client.execute(httpGet); > InputStream content = execute.getEntity().getContent(); > > BufferedReader buffer = new BufferedReader(new > InputStreamReader(content)); > String s = ""; > while ((s = buffer.readLine()) != null) { > response += s; > } > > } catch (Exception e) { > e.printStackTrace(); > } > } > return response; > } > > @Override > protected void onPostExecute(String result) { > textView.setText(result); > } > } > > public void readWebpage(View view) { > DownloadWebPageTask task = new DownloadWebPageTask(); > task.execute(new String[] { "http://www.mysite.net/LEDstate.txt" }); > > } > } > > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en