我在我的应用中设置了一个LocationManager来定位用户并显示其当前位置。 这工作正常,除了太长的开始时间(有时> 10秒)。开始时间之后,服务按预期工作。GPS定位需要很长时间才能启动
这是一个日志输出。第一行是在启动LastKnownLocation
,该LocationService以后18秒开始......
05-04 09:14:29.301 23688-23688/xxxxx D/MainActivity: Moving GMaps to location Location[gps x,986175,x,121746 acc=14 et=+2d11h37m45s435ms alt=165.0 vel=0.0 {Bundle[mParcelledData.dataSize=40]}]
[...]
05-04 09:14:47.943 23688-23688/xxxxx D/MainActivity: Moving GMaps to location Location[gps x,986343,x,121702 acc=33 et=+2d11h40m57s443ms alt=149.0 vel=0.25 bear=139.8 {Bundle[mParcelledData.dataSize=40]}]
05-04 09:14:48.940 23688-23688/xxxxx D/MainActivity: Moving GMaps to location Location[gps x,986351,x,121693 acc=30 et=+2d11h40m58s442ms alt=134.0 vel=0.25 bear=139.8 {Bundle[mParcelledData.dataSize=40]}]
05-04 09:14:49.948 23688-23688/xxxxx D/MainActivity: Moving GMaps to location Location[gps x,986373,x,121666 acc=28 et=+2d11h40m59s448ms alt=160.0 vel=0.25 bear=139.8 {Bundle[mParcelledData.dataSize=40]}]
[...]
这是我当前的代码:
的onCreate:
SupportMapFragment mapFragment
= (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
onMyMapReady(googleMap);
}
});
onMyMapReady:
private void onMyMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
@Override
public void onMapLoaded() {
askPermissionsAndShowMyLocation();
}
});
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.getUiSettings().setAllGesturesEnabled(false);
mMap.getUiSettings().setMyLocationButtonEnabled(false);
}
askPermissionsAndShowMyLocation()
是一个简单的方法来要求ACCESS_COARSE_LOCATION
和ACCESS_FINE_LOCATION
权限。成功(或在API 23以下),方法showMyLocation()
将被调用。
showMyLocation(因为我可以在我的日志中看到,这将是没有在启动任何巨大的延迟称呼):
private void showMyLocation() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
String locationProvider = this.getEnabledLocationProvider();
if (locationProvider == null) {
dialogCheckGps();
return;
}
Log.d(LOG_TAG, "Location provider: " + locationProvider);
try {
mLocationManager.requestLocationUpdates(
locationProvider,
0,
0, this);
currentLocation = mLocationManager
.getLastKnownLocation(locationProvider);
} catch (SecurityException e) {
Log.e(LOG_TAG, "Show My Location Error:" + e.getMessage());
}
///////////////////
// This is the first log entry from above.
///////////////////
if (currentLocation != null) {
LatLng latLng = new LatLng(currentLocation.getLatitude(), currentLocation.getLongitude());
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, ZOOM_LEVEL));
moveToLocation(currentLocation);
} else {
Log.d(LOG_TAG, "Location not found");
}
}
onLocationChanged(这应立即调用,而有延迟,你叫可以在上面的日志中看到):
@Override
public void onLocationChanged(Location location) {
moveToLocation(location);
}
任何人都可以很好地修复以更快地获取位置更新?
在此先感谢。
这取决于固定的卫星。 GPS需要至少3-4颗卫星固定。如果你在开放的天空,那么有可能使用GPS获得更快的位置 –
谢谢,我如何获得更快的定位? – Prexx
这完全与代码无关。 GPS信号可能需要很长时间来计算GPS位置,因为天气不好,或者您在室内,或者您的位置位于GPS弱的地方,并且您无法做出任何事情来解决此问题 –