如何在Android中不使用getLastKnownLocation方法获取当前的经纬度？
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【中文标题】如何在Android中不使用getLastKnownLocation方法获取当前的经纬度？【英文标题】：How get the current latitud and longitud without use getLastKnownLocation method in Android? 【发布时间】：2015-04-14 16:00:24 【问题描述】：我正在尝试获取手机的current 位置，为此我使用GPSTracker tutorial，问题总是使用方法getLastKnownLocation 并返回旧位置。
if (isNetworkEnabled)
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null)
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null)
latitude = location.getLatitude();
longitude = location.getLongitude();
// 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, 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();
你可以看到教程使用Network或GPS提供者时使用getLastKnownLocation，但我真的很需要当前位置。
不知道怎么弄的！
【问题讨论】：
【参考方案1】：将 Fused Location Provider API 与 GoogleApiClient 结合使用。您可以找到 apihere。它们旨在提供高精度的位置。使用 GoogleApiClient 使用它。
new GoogleApiClient.Builder(context)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build()
还有其他使用位置提供程序的方法。您不应局限于使用 GPS 和移动网络获得的位置。而是遍历所有位置提供者，并根据您的准确性要求选择那些为您提供高精度的位置提供者。下面的代码就是这样做的：
Location bestResult = null;
float bestAccuracy = Float.MAX_VALUE;
long bestAge = Long.MIN_VALUE;
List<String> matchingProviders = mLocationManager.getAllProviders();
for (String provider : matchingProviders)
Location location = mLocationManager.getLastKnownLocation(provider);
if (location != null)
float accuracy = location.getAccuracy();
long time = location.getTime();
if (accuracy < bestAccuracy)
bestResult = location;
bestAccuracy = accuracy;
bestAge = time;
// Return best reading or null
if (bestAccuracy > minAccuracy
|| (System.currentTimeMillis() - bestAge) > maxAge)
return null;
else
return bestResult;
您也可以在检查其准确性后直接使用位置对象。您应该利用其他应用程序访问的位置，而不仅仅是依赖 GPS/移动网络获得的位置。
如果您想持续监听位置更新，请实现 Locationlistener 回调以持续获取位置更新。
【讨论】：
【参考方案2】：如果我没记错的话，该教程相当陈旧，并且不使用融合位置。如果你在 android Studio 中开发，可以考虑试试这个库：https://github.com/mcharmas/Android-ReactiveLocation
使用最新 API 减少代码和融合位置。
简单地获取最后一个已知位置：
ReactiveLocationProvider locationProvider = new ReactiveLocationProvider(context);
locationProvider.getLastKnownLocation()
.subscribe(new Action1<Location>()
@Override
public void call(Location location)
// doSthImportantWithObtainedLocation(location);
);
就是这样！
【讨论】：
获取纬度和经度将是locationProvider.getLatitud?
Location 对象包括 getLatitude() 和 getLongitude() developer.android.com/reference/android/location/Location.html【参考方案3】：
我认为其中一个答案使用了 locationListner，但这是一个简单的解决方案，即使 GPS 不可用，它也会通过调用 getBestProvider 返回位置，
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String context = Context.LOCATION_SERVICE;
locationManager = (LocationManager)getSystemService(context);
String provider = locationManager.getBestProvider(criteria, true);
locationManager.requestLocationUpdates(provider, 2000, 0, locationListener);
private final LocationListener locationListener = new LocationListener()
public void onLocationChanged(Location location)
Double latitude = location.getLatitude();
Double longitude = location.getLongitude();
;
【讨论】：
【参考方案4】：The method mentioned above is the deprecated method and Android has asked developers to use the below method.
https://developer.android.com/training/location/retrieve-current.html
Sample Code
onCreate()
final LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !manager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
buildAlertMessageNoGps();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
@Override
protected void onStart()
super.onStart();
// Connect the client.
mGoogleApiClient.connect();
@Override
protected void onStop()
// Disconnecting the client invalidates it.
mGoogleApiClient.disconnect();
super.onStop();
@Override
public void onConnected(Bundle bundle)
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
mLocationRequest.setInterval(1000 * 60 * 5);
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
@Override
public void onLocationChanged(Location location)
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(this, Locale.getDefault());
try
addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
String address = addresses.get(0).getAddressLine(1);
catch (IOException e)
e.printStackTrace();
editor.commit();
【讨论】：
【参考方案5】：使用下面的代码 -
private class LocationListener extends Activity implements android.location.LocationListener
Location mLastLocation;
public LocationListener(String provider)
Log.e(TAG, "LocationListener " + provider);
mLastLocation = new Location(provider);
LocationListener[] mLocationListeners = new LocationListener[]
new LocationListener(LocationManager.GPS_PROVIDER),
new LocationListener(LocationManager.NETWORK_PROVIDER)
;
private void initializeLocationManager()
Log.e(TAG, "initializeLocationManager");
if (mLocationManager == null)
mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
@Override
public void onLocationChanged(Location location)
Log.e(TAG, "onLocationChanged: " + location);
mLastLocation.set(location);
Toast.makeText(mContext, "Driver location :"+location.getLatitude()+" , "+location.getLongitude(), Toast.LENGTH_SHORT).show();
//TODO call web service to update driver location to server
driverLocationUpdateServerRequest(location);
@Override
public void onProviderDisabled(String provider)
Log.e(TAG, "onProviderDisabled: " + provider);
@Override
public void onProviderEnabled(String provider)
Log.e(TAG, "onProviderEnabled: " + provider);
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
Log.e(TAG, "onStatusChanged: " + provider);
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
initializeLocationManager();
try
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[1]);
catch (java.lang.SecurityException ex)
Log.i(TAG, "fail to request location update, ignore", ex);
catch (IllegalArgumentException ex)
Log.d(TAG, "network provider does not exist, " + ex.getMessage());
try
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[0]);
catch (java.lang.SecurityException ex)
Log.i(TAG, "fail to request location update, ignore", ex);
catch (IllegalArgumentException ex)
Log.d(TAG, "gps provider does not exist " + ex.getMessage());
【讨论】：
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