在某些安卓手机中无法获得准确的位置
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【中文标题】在某些安卓手机中无法获得准确的位置【英文标题】:Not gettting accurate location in some android phones 【发布时间】:2016-07-18 09:11:42 【问题描述】:我使用了下面的代码。它工作正常,但在 Redme、Asus 等某些设备中无法获得准确的位置。它显示我离当前位置大约 20 公里远。没有找到问题所在,有人有想法请分享想法。提前致谢。
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 status
public boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
SetOnLocationFoundListner OLF;
public interface SetOnLocationFoundListner
public void onLocationFound(Location location, boolean getLocRegularly, GoogleMap gmap);
public Currentlocation(Context context)
this.mContext = context;
getLocation();
public Location getLocation()
try
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled)
// no network provider is enabled
else
this.canGetLocation = true;
// First get location from Network Provider
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();
catch (Exception e)
e.printStackTrace();
return location;
/**
* Stop using GPS listener Calling this function will stop using GPS in your
* app
*/
public void stopUsingGPS()
if (locationManager != null)
locationManager.removeUpdates(Currentlocation.this);
/**
* Function to get latitude
*/
public double getLatitude()
if (location != null)
latitude = location.getLatitude();
// return latitude
return latitude;
/**
* Function to get longitude
*/
public double getLongitude()
if (location != null)
longitude = location.getLongitude();
// return longitude
return longitude;
/**
* Function to check GPS/wifi enabled
*
* @return boolean
*/
public boolean canGetLocation()
return this.canGetLocation;
@Override
public void onLocationChanged(Location location)
// TODO Auto-generated method stub
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
// TODO Auto-generated method stub
@Override
public void onProviderEnabled(String provider)
// TODO Auto-generated method stub
@Override
public void onProviderDisabled(String provider)
// TODO Auto-generated method stub
@Override
public IBinder onBind(Intent intent)
// TODO Auto-generated method stub
return null;
/**
* Function to show settings alert dialog On pressing Settings button will
* lauch Settings Options
*/
【问题讨论】:
【参考方案1】:你不能指望手机既不总是有一个有效的“最后已知位置”也不以微秒为单位定义它的位置。
您首先致电requestLocationUpdates()
,然后立即致电getLastKnownLocation()
。手机没有时间确定/更新“最后已知位置”。此外,现在当你打电话给getLocation()
时,你总是一次又一次地打电话给requestLocationUpdates()
。当您想开始接收位置更新时,只需调用一次即可。
只需订阅一次即可接收位置更新,并始终在回调中获得最新位置,该回调会稍有延迟。您已经有了空的 onLocationChanged()
方法。那就是回调方法。只需让它处理位置更新。
如果您不想收到任何进一步的更新,当然可以在onLocationChanged()
回调中收到最新的位置后致电removeUpdates()
或removeLocationUpdates()
。
一些有用的 *** 讨论:
How to get location that isn't out of date?
android: getLastKnownLocation out-of-date - how to force location refresh?
Android - Reliably getting the current location
【讨论】:
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