gps

问题 I tracked the gps with the following code, But How to get notified If the gps tracker reaches that location ... Capture.java public class Capture extends Activity implements LocationListener{ Button btnNWShowLocation,btnsave; TextView etlat,etlng,alreadyposted,t3,t4,t5; EditText etplace; String state1,state2; protected String v1, v2, v3; JSONParser jsonParser = new JSONParser(); JSONArray jsonarray; ArrayList<HashMap<String,String>> arraylist; JSONObject jsonobject; String TAG_SUCCESS=

问题 I am investigating GPS location on Samsung Galaxy2 (Android 2.3.5). SG2 supports A-GPS, so I turned GPS, Wifi network and Sensor aiding on. It looks working well but sometimes the GPS gives completely different location more than 50km far from my current place. Also the location changes often even though I just put on the phone one spot and never touched. I am still new to Android, so I not sure what causes this problem. Below is the source code handling GPS location.: public class

问题 On an app I am working on I need to track the a user's journey, and then map it to the user. In this scenario I need the most accurate location data possible. I have created a CLLocationManager for this task. In order to revive the most accurate location possible I set the desired accuracy filter of the manager to kCLLocationAccuracyBest. In order to ensure I don't get extra coordinates when the user is not moving, I set the distance filter the manager to 2.5 meters . However, I was still

问题 I have used below code. It work fine but in some devices like Redme,Asus not getting accurate location.It shown me too far from my current location aprox 20 km away.Not getting where is problem somebody have idea please share there ideas.Thanks in advance. public class Currentlocation extends Service implements LocationListener { private final Context mContext; // flag for GPS status boolean isGPSEnabled = false; // flag for network status boolean isNetworkEnabled = false; // flag for GPS

问题 When I request the Cell ID and LAC information, on some devices I cannot retreive them. I use this code: TelephonyManager tm =(TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); location = (GsmCellLocation) tm.getCellLocation(); cellID = location.getCid(); lac = location.getLac(); Does anyone know why some GSM carriers do not provide them? Do I need permissions for that? What else is there to know about retreiving the CellID and LAC? 回答1: So you can try something like. I have got

问题 How to detect if GPS is available? The iPod touch and iPad WiFi version don't have GPS, they have something else based on WiFi. Anyway, how to know if GPS is available? Or how to detect iPod Touch or iPad Wifi model? 回答1: This is a common difficulty on iOS... One way would be to get a location and check if the altitude is present. if a valid altitude is present, the position has most probably been computed using GPS else either the GPS has not picked-up any signal yet or it is not present.

问题 Can I get a location of mobile devices from j2me programming having no GPS unit installed? Can I obtain the location using cell tower info? I heard about triangulation method. And gone through http://developers.sun.com/mobility/apis/articles/location/ doc In this doc they have given code only for mobile phones having GPS application installed. But what about the others which does not have GPS in them? How can they get the location? update I got a link which answers my question: http:/

问题 My app has been ported from Android to blackberry and it works fine... the only thing not working is the GPS location which works on the android.... the app displays a message to the using that we are trying to find the location and if no location is found we tell the user that we could not retrieve a location.. here is the code private void gpsLocation() { //Get the location manager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); //Provide Criteria Criteria

问题 I'm writing a flask application, using some data extracted from a GPS sensor. I am able to draw the route on a Map and I want to calculate the distance the GPS sensor traveled. One way could be to just get the start and end coordinates, however due to the way the sensor travels this is quite inaccurate. Therefore I do sampling of each 50 sensor samples. If the real sensor sample size was 1000 I will now have 20 samples (by extracting each 50 sample). Now I want to be able to put my list of

问题 I'm trying to find a property that indicates how iPhone physically obtains CLLocation ? As far as I am aware iPhone gets CLLocation via either: 1) GPS 2) Cell tower triangulation 3) Wifi ID and signal strength Can I programmatically refer to something in the publicly accessible libraries to get this? If there isn't a way to identify it programmatically in the publicly accessible libraries, is there a "round about" way to get the same information? 回答1: The short answer is no, there is no