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copied!<p>I've got the same problem. If I stay on the current activity, no problem, but if I leave the activity while <code>doInBackgroud</code> is running, <code>onPostExecute</code> will exit on the Toast line.</p> <p>To resolve the problem, you have to use a handler :<br /> In the class</p> <pre><code>private static final int TOAST = 0; private Handler mHandler = null; </code></pre> <p>In <code>OnCreate()</code></p> <pre><code>// Creation of the handler to display Toasts if (mHandler == null) { mHandler = new Handler() { @Override public void handleMessage(Message _msg) { switch (_msg.what) { case TOAST: Toast.makeText(ServerTabHost.this, (String)_msg.obj, Toast.LENGTH_LONG).show(); break; default : break; } super.handleMessage(_msg); } }; } </code></pre> <p>In <code>onPostExecute()</code> </p> <pre><code>Message msg = new Message(); msg.what = TOAST; msg.obj = "my toast message"; mHandler.sendMessage(msg); </code></pre> <p>In your code it looks like this :</p> <pre><code>public class statuspage extends MapActivity { // These two lines are for the handler private static final int TOAST = 0; private Handler mHandler = null; LocationManager locationManager; MapView mapView; Criteria criteria; Location location; Geocoder gc; Address address; String bestProvider; String LOCATION_SERVICE = "location"; String addressString = "Searching for Nearest Address"; StringBuilder sb; private MapController mapController; private MyLocationOverlay myLocation; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.statuspage); // Get Mapping Controllers etc // mapView = (MapView) findViewById(R.id.mapView); mapController = mapView.getController(); mapController.setZoom(17); mapView.setBuiltInZoomControls(true); // Add the MyLocationOverlay // myLocation = new MyLocationOverlay(this, mapView); mapView.getOverlays().add(myLocation); myLocation.enableCompass(); myLocation.enableMyLocation(); // Animates the map to GPS Position // myLocation.runOnFirstFix(new Runnable() { @Override public void run() { mapController.animateTo(myLocation.getMyLocation()); } }); // Creation of the handler to display Toasts if (mHandler == null) { mHandler = new Handler() { @Override public void handleMessage(Message _msg) { switch (_msg.what) { case TOAST: Toast.makeText(ServerTabHost.this, (String)_msg.obj, Toast.LENGTH_LONG).show(); break; default : break; } super.handleMessage(_msg); } }; } } @Override protected boolean isRouteDisplayed() { // Location Manager Intiation locationManager = (LocationManager) statuspage.this .getSystemService(LOCATION_SERVICE); criteria = new Criteria(); // More accurate, GPS fix. criteria.setAccuracy(Criteria.ACCURACY_FINE); // More accurate, GPS fix. bestProvider = locationManager.getBestProvider(criteria, true); location = locationManager.getLastKnownLocation(bestProvider); updateWithNewLocation(location); locationManager.requestLocationUpdates(bestProvider, 60000, 10, locationListener); // 1800000 = 30 Min return false; } class GeoCoder extends AsyncTask<Void, Void, Void> { String lat = "Acquiring"; String lng = "Acquiring"; @Override protected Void doInBackground(Void... params) { if (location != null) { /** * double latitude = myLocation.getMyLocation().getLatitudeE6(); * double longitude = * myLocation.getMyLocation().getLongitudeE6(); */ double latitude = location.getLatitude(); double longitude = location.getLongitude(); lat = "" + latitude; lng = "" + longitude; // gc = new Geocoder(statuspage.this, Locale.getDefault()); Geocoder gc = new Geocoder(getApplicationContext(), Locale.getDefault()); try { List<Address> addresses = gc.getFromLocation(latitude, longitude, 1); sb = new StringBuilder(); if (addresses != null && addresses.size() > 0) { address = addresses.get(0); int noOfMaxAddressLine = address .getMaxAddressLineIndex(); if (noOfMaxAddressLine > 0) { for (int i = 0; i < address .getMaxAddressLineIndex(); i++) { sb.append(address.getAddressLine(i)).append( "\n"); } addressString = sb.toString(); } } } catch (Exception e) { addressString = "Sorry, we are trying to find information about this location"; } } return null; } @Override protected void onPostExecute(Void result) { // Sending the Toast message through the handler Message msg = new Message(); msg.what = TOAST; msg.obj = "My toast message"; mHandler.sendMessage(msg); TextView scrollview = (TextView) findViewById(R.id.scrollview); // Latitude and Longitude TextView TextView etlongitude = (TextView) findViewById(R.id.etlongitude); TextView etlatitude = (TextView) findViewById(R.id.etlatitude); // TextView to display GeoCoder Address scrollview.setGravity(Gravity.CENTER); scrollview.setText("Your location:" + "\n" + "(Accurate to 500 meters)" + "\n" + (addressString)); Log.d("Address", (addressString)); // Latitude and Longitude TextView Display Coordinates // etlongitude.setText(lng); etlatitude.setText(lat); // Log.d("GeoCoder", "In-Task"); return; } </code></pre> <p>Personally, I was in a Fragment so I had to create the handler in the host activity and then pass it in the fragment constructor.</p>

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