Question

大家好我正在为Admin开发两个应用程序，为员工开发第二个应用程序。现在我想使用此应用程序跟踪员工设备，当员工设备的位置发生变化时，该位置将发送到服务器。仅在位置更改时才发送位置。如何在位置发生变化时将设备的位置发送到服务器？第二，我想在管理员应用程序地图上显示员工的位置，因为它正在改变其位置。（我可以通过GCM或任何其他技术将位置从服务器发送到管理员应用程序吗？）

嘿，沮丧的选民可以解释这个问题的错误吗？如果您对问题有答案，那么请尽量理解问题。请帮忙提前谢谢..

Answer 1

你可以用服务实现locationListener，你可以从服务器req api并以任何形式，json，xml发送数据，一旦你得到坐标，你就可以将它们显示到地图上。

LocationListener

android-location-based-services-example

希望这些可以帮到你。

Answer 2

public LatLng getLocation()
{
 // Get the location manager
 MyLocationListener myLocListener = new MyLocationListener();
 LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
 Criteria criteria = new Criteria();
 String bestProvider = locationManager.getBestProvider(criteria, false);
 Location location = locationManager.getLastKnownLocation(bestProvider);
 locationManager.requestLocationUpdates(bestProvider,timeAfteryougetUpdate, minDistanceAfterYougetupdate, myLocListener);
 Double lat,lon;
 try {
   lat = location.getLatitude ();
   lon = location.getLongitude ();
   return new LatLng(lat, lon);
 }
 catch (NullPointerException e){
     e.printStackTrace();
   return null;
 }
}

**用它来获取位置**

private class MyLocationListener implements LocationListener
  {
@Override
public void onLocationChanged(Location loc)
  {
  if (loc != null)
  {
     // Do something knowing the location changed by the distance you requested
     methodThatDoesSomethingWithNewLocation(loc);
  }
 }

 @Override
 public void onProviderDisabled(String arg0)
 {
   // Do something here if you would like to know when the provider is disabled by the user
 }

 @Override
 public void onProviderEnabled(String arg0)
 {
    // Do something here if you would like to know when the provider is enabled by the   user
  }

  @Override
 public void onStatusChanged(String arg0, int arg1, Bundle arg2)
 {
  // Do something here if you would like to know when the provider status changes
 }
 }

Answer 3

我知道我的回复有点晚了。

我将使用Google Maps Services和Firebase实时数据库以及Geo-Fire解释我的答案，以便将位置轻松上传到云数据库。

获取实时位置-

 @Override public void onMapReady(GoogleMap googleMap) {
 mMap = googleMap;
 locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
         ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
     // add the code to get the permission
     return;
 }
 buildGoogleApiClient();
 mMap.setMyLocationEnabled(true);

}

 protected synchronized void buildGoogleApiClient(){
 mGoogleApiClient = new GoogleApiClient.Builder(this)
         .addConnectionCallbacks(this)
         .addOnConnectionFailedListener(this)
         .addApi(LocationServices.API)
         .build();
 mGoogleApiClient.connect();

}

 @Override public void onConnected(@Nullable Bundle bundle) {
 mLocationRequest = new LocationRequest();
 mLocationRequest.setPriority(LocationRequest.PRIORITY_LOW_POWER);
 if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
     return;
 }
 LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

}

 @Override     public void onLocationChanged(Location location) {
 if(getApplicationContext() != null) {
     mlasLocation = location;
     LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude()); // plot the realtime location on the map
     mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
     mMap.animateCamera(CameraUpdateFactory.zoomTo(11));      
     addToDataBase(latLng);
 }

}

使用Geo-Fire将实时位置添加到云数据库

public void addtoDataBase(LatLng location){
 //unique name work like a promary key
 String uid = "119-userID";
 final DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("SOSRequests");
 GeoFire geoFire = new GeoFire(databaseReference);
 geoFire.setLocation(uid, new GeoLocation(location.latitude, location.longitude));

}

Android实时位置跟踪

3 个答案: