Android 在一些安卓手机中无法获得准确位置
我使用了下面的代码。它工作正常,但在某些设备中,如Redme、华硕无法获得准确的位置。它显示我距离当前位置约20公里远。无法到达哪里是问题有人有想法请在那里分享想法。提前感谢Android 在一些安卓手机中无法获得准确位置,android,gps,location,latitude-longitude,locationmanager,Android,Gps,Location,Latitude Longitude,Locationmanager,我使用了下面的代码。它工作正常,但在某些设备中,如Redme、华硕无法获得准确的位置。它显示我距离当前位置约20公里远。无法到达哪里是问题有人有想法请在那里分享想法。提前感谢 public class Currentlocation extends Service implements LocationListener { private final Context mContext; // flag for GPS status boolean isGPSEnabled = false;
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
*/
}
您不能期望手机始终具有有效的“最后已知位置”,也不能以微秒为单位定义其位置 首先调用
requestLocationUpdates()
,然后立即调用getLastKnownLocation()
。手机没有时间确定/更新“最后已知位置”。此外,当您调用getLocation()
时,您总是一次又一次地调用requestLocationUpdates()
。当你想开始接收位置更新时,只需调用它一次
只需订阅一次接收位置更新,并始终在回调中获得最新的位置,只需稍微延迟。您已经有空的onLocationChanged()
方法。这就是回调方法。只需这样做来处理位置更新
如果您不想接收任何进一步的更新,您当然可以在onLocationChanged()
回调中收到最新的位置后调用removeUpdates()
或removeLocationUpdate()
一些有用的讨论: