Question

我是Android编程新手。我想开发一个使用Location API的应用程序。我正在使用位置管理器。代码：

        public Location getLocation() {
            try {
                locationManager = (LocationManager) mContext
                        .getSystemService(LOCATION_SERVICE);

                isGPSEnabled = locationManager
                        .isProviderEnabled(LocationManager.GPS_PROVIDER);

                isNetworkEnabled = locationManager
                        .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

                if (!isGPSEnabled && !isNetworkEnabled) {
                } else {
                    this.canGetLocation = true;
                    if (isNetworkEnabled) {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("clickindia", "Network");
                        if (locationManager != null) {
                            location = locationManager
                                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                            Log.d("message","location"+location);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }

                    if (isGPSEnabled) {
                        if (location == null) {
                            locationManager.requestLocationUpdates(
                                    LocationManager.GPS_PROVIDER,
                                    MIN_TIME_BW_UPDATES,
                                    MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                            Log.d("message", "GPS Enabled");
                            if (locationManager != null) {
                                location = locationManager
                                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                                if (location != null) {
                                    latitude = location.getLatitude();
                                    longitude = location.getLongitude();
                                }
                            }
                        }
                    }
                }

清单文件中提到了所有必要的权限。我在手机上运行代码，似乎getLastKnownLocation()没有做任何事情。请帮助我被困住

我无法使用新的FusedLocationApi，因为我的手机的谷歌播放服务版本低于支持googleApiClient和LocationServices所需的版本。

Answer 1

您可以从

获取位置信息

onLocationChanged(Location location)

Answer 2

让您got Google Maps API key并设置google api console中的所有内容吗？

Answer 3

 best = LocationManager.NETWORK_PROVIDER;
 loc = (LocationManager) getSystemService(LOCATION_SERVICE);
 googleMap.setMyLocationEnabled(true);
 loc.requestLocationUpdates(best,1000,0,this);
 location=loc.getLastKnownLocation(best);

试试这个。你的代码应该有用。

位置对象为空

3 个答案: