在地图中显示当前位置时获取纬度和经度0.0
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了在地图中显示当前位置时获取纬度和经度0.0相关的知识，希望对你有一定的参考价值。
我使用以下代码来获取我当前的位置。但我面临的问题是，纬度和经度总是返回0.0。我已打开手机中的GPS设置并设置所有权限。但我仍然面对这个问题。
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
customLocationListener = new CustomLocationListener();
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
0,
0,
customLocationListener);
class CustomLocationListener implements LocationListener{ ............
public void onLocationChanged(Location argLocation) {
if(location != null) {
int latitude=(int)(argLocation.getLatitude()*1E6);
int longitude=(int)(argLocation.getLongitude()*1E6);
}
} ........ }
你们中的任何人都知道为什么吗？
注意：我的活动扩展了MapActivity而不是Location Listener
答案
试试这种方式
locationManager = (LocationManager) context
.getSystemService(Context.LOCATION_SERVICE);
Criteria locationCritera = new Criteria();
String providerName = locationManager.getBestProvider(locationCritera,
true);
if(providerName!=null)
location = locationManager.getLastKnownLocation(providerName);
locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, locationListener);
在mylocationlistener中设置您的位置对象
private class MyLocationListener implements LocationListener {
public void onLocationChanged(Location loc) {
if (loc != null) {
location = loc;
}
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
另一答案
还检查这是其中一个原因。转到地图默认应用程序并允许用户允许经度和经度选项。在我们的应用程序中当GPS信号闪烁时，当它停止时我们将获得经度和纬度。这对我有用
编辑1
- 打开Google地图应用并点击地图上的按钮以获取当前位置。
- 如果您允许使用Google地图权限，则只有其他应用权限才有效。 （我觉得这是个大错误）
- 现在转到您的应用程序并尝试获取当前位置，它将工作。
这很难看，但我们已按照这些步骤在我们的应用中获取当前位置。
另一答案
这就是你想要的......！
public void getCurrentLocation() {
LocationManager locationManager;
String context = Context.LOCATION_SERVICE;
locationManager = (LocationManager) getSystemService(context);
Criteria crta = new Criteria();
crta.setAccuracy(Criteria.ACCURACY_FINE);
crta.setAltitudeRequired(false);
crta.setBearingRequired(false);
crta.setCostAllowed(true);
crta.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationManager.getBestProvider(crta, true);
locationManager.requestLocationUpdates(provider, 1000, 0,
new LocationListener() {
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(Location location) {
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
if (lat != 0.0 && lng != 0.0) {
System.out.println("WE GOT THE LOCATION");
System.out.println(lat);
System.out.println(lng);
}
}
}
});
}
另一答案
在这里，当我们给出位置许可然后等待几秒后，GPS将花费时间来稳定位置，之后我们将获得lat和long的实际值。
设置 - > GPS启用
Reason for lat long value comes 0.0
另一答案
custom location manager.Java
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
public class CustomLocationManager {
private LocationManager mLocationManager;
private LocationValue locationValue;
private Location networkLocation = null;
private Location gpsLocation = null;
private Timer mTimer;
private boolean isGpsEnabled = false;
private boolean isNetworkEnabled = false;
private static CustomLocationManager _instance;
private CustomLocationManager() {}
public static CustomLocationManager getCustomLocationManager() {
if (_instance == null) {
_instance = new CustomLocationManager();
}
return _instance;
}
public LocationManager getLocationManager(Context context) {
if (mLocationManager == null)
mLocationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
return mLocationManager;
}
public boolean getCurrentLocation(Context context, LocationValue result) {
locationValue = result;
if (mLocationManager == null)
mLocationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
try {
isGpsEnabled = mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {}
try {
isNetworkEnabled = mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) {}
if (!isGpsEnabled && !isNetworkEnabled)
return false;
if (isGpsEnabled)
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, gpsLocationListener);
if (isNetworkEnabled)
mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, networkLocationListener);
mTimer = new Timer();
mTimer.schedule(new GetLastKnownLocation(), 20000);
return true;
}
LocationListener gpsLocationListener = new LocationListener() {
public void onLocationChanged(Location location) {
mTimer.cancel();
locationValue.getCurrentLocation(location);
mLocationManager.removeUpdates(this);
mLocationManager.removeUpdates(networkLocationListener);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
private LocationListener networkLocationListener = new LocationListener() {
public void onLocationChanged(Location location) {
mTimer.cancel();
locationValue.getCurrentLocation(location);
mLocationManager.removeUpdates(this);
mLocationManager.removeUpdates(gpsLocationListener);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
private class GetLastKnownLocation extends TimerTask {
CurrentLocationHandler handler;
GetLastKnownLocation() {
handler = new CurrentLocationHandler();
}
@Override
public void run() {
mLocationManager.removeUpdates(gpsLocationListener);
mLocationManager.removeUpdates(networkLocationListener);
if (isGpsEnabled)
gpsLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (isNetworkEnabled)
networkLocation = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
handler.sendEmptyMessage(0);
}
}
private class CurrentLocationHandler extends Handler {
@Override
public final void handleMessage(Message msg) {
if (gpsLocation != null && networkLocation != null) {
if (gpsLocation.getTime() > networkLocation.getTime())
locationValue.getCurrentLocation(gpsLocation);
else
以上是关于在地图中显示当前位置时获取纬度和经度0.0的主要内容，如果未能解决你的问题，请参考以下文章