StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POAsyncTask and Looper.prepare() crash on every 6th call
text
Body
copied!<p>i have an issue with looper.prepare() in doInBackground(). if i donot use looper.prepare it generates an exception "Can't create handler inside thread that has not called Looper.prepare()" and when i use looper.prepare it works fine for 5 calls to looper.prepare and on sixth call it generates following exception.</p> <pre><code>08-15 11:29:48.078: W/System.err(14133): java.lang.RuntimeException: Only one Looper may be created per thread 08-15 11:29:48.088: W/System.err(14133): at android.os.Looper.prepare(Looper.java:74) 08-15 11:29:48.088: W/System.err(14133): at the.bike.washer.SelectLocation$setUserCurrentLocation.doInBackground(SelectLocation.java:1504) 08-15 11:29:48.088: W/System.err(14133): at the.bike.washer.SelectLocation$setUserCurrentLocation.doInBackground(SelectLocation.java:1) 08-15 11:29:48.088: W/System.err(14133): at android.os.AsyncTask$2.call(AsyncTask.java:264) 08-15 11:29:48.088: W/System.err(14133): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 08-15 11:29:48.088: W/System.err(14133): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 08-15 11:29:48.088: W/System.err(14133): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208) 08-15 11:29:48.088: W/System.err(14133): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 08-15 11:29:48.088: W/System.err(14133): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 08-15 11:29:48.088: W/System.err(14133): at java.lang.Thread.run(Thread.java:856) </code></pre> <p>Here is the code </p> <pre><code>try { Looper.prepare(); locationManager = (LocationManager) context .getSystemService(LOCATION_SERVICE); // getting GPS status isGPSEnabled = locationManager .isProviderEnabled(LocationManager.GPS_PROVIDER); // getting network status isNetworkEnabled = locationManager .isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { // no network provider is enabled double lat = 48.8742; double lng = 2.3470; Constants.coordinates = new LatLng(lat, lng); Constants.address = getFromLocation(lat, lng, 1); result = "no gps"; } else { //this.canGetLocation = true; if (isNetworkEnabled) { locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, SelectLocation.this); Log.d("Network", "Network"); if (locationManager != null) { location = locationManager .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); Constants.coordinates = new LatLng(latitude, longitude); Constants.address = getFromLocation(latitude, longitude, 1); } } } // if GPS Enabled get lat/long using GPS Services if (isGPSEnabled) { if (location == null) { locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, SelectLocation.this); Log.d("GPS Enabled", "GPS Enabled"); if (locationManager != null) { location = locationManager .getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); Constants.coordinates = new LatLng(latitude, longitude); Constants.address = getFromLocation(latitude, longitude, 1); } } } } } } catch (Exception e) { e.printStackTrace(); } </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload