问题
I have implemented sample application for get the current location latitude longitude.If i lunch my application in emulator and i am sending latitude and longitude from Emulator Controls at eclipse then i am getting current location latitude and longitude which from emulator controls.If i lunch the same application in real device then i am not able to get current location latitude and longitude
I have implemented code for get the current location latitude and longitude as follows:
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 11, 11, mlocListener);
public class MyLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
Log.v("11111","Latitude :"+loc.getLatitude());
Log.v("22222","Longitude :"+ loc.getLongitude());
}
}
From the above code i am not getting current location latitude and longitude in real android device.
How can i get current location latitude and longitude of real device?
please any body help me
回答1:
prasad try this code ..by using this i am successfully getting lat long
private Location location = null;
private LocationManager locationManager = null;
locationManager = (LocationManager) context.getSystemService (Context.LOCATION_SERVICE);
Criteria locationCritera = new Criteria();
locationCritera.setAccuracy(Criteria.ACCURACY_FINE);
locationCritera.setAltitudeRequired(false);
locationCritera.setBearingRequired(false);
locationCritera.setCostAllowed(true);
locationCritera.setPowerRequirement(Criteria.NO_REQUIREMENT);
String providerName = locationManager.getBestProvider(locationCritera,
true);
location = locationManager.getLastKnownLocation(providerName);
locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, locationListener);
currentLocation = context.getSharedPreferences(PREFS_NAME, 0);
editor = currentLocation.edit();
}
public String getCurrentLatitude() {
try {
if (!currentLocation.getString("currentLatitude", "")
.equalsIgnoreCase(""))
return currentLocation.getString("currentLatitude", "");
else if (location.getLatitude() != 0.0)
return Double.toString(location.getLatitude());
else
return "0.0";
} catch (Exception e) {
e.printStackTrace();
}
return "0.0";
}
public String getCurrentLongitude() {
try {
if (!currentLocation.getString("currentLongitude", "")
.equalsIgnoreCase(""))
return currentLocation.getString("currentLongitude", "");
else if (location.getLongitude() != 0.0)
return Double.toString(location.getLongitude());
else
return "0.0";
} catch (Exception e) {
e.printStackTrace();
}
return "0.0";
}
回答2:
GPS_PROVIDER does not work in bound place. So if gps_provider is enabled but you get null location you can replace provider from gps to NETWORK_PROVIDER.
回答3:
are you trying on emulator or device. if you are trying in device then your device should have to be near window or in open place.
回答4:
override these methods in your MyLocationListener. so that you can track your GPS status. check and see if you can get whats the problem
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Disabled",
Toast.LENGTH_SHORT ).show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Enabled",Toast.LENGTH_SHORT).show();
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
回答5:
On a real device, you will have to be patient and wait for a fix from the satellites. This can take several minutes, even with a clear view of the sky.
For testing outside, you would be better advised to have a simple text box in your app, initialise it to something like "No GPS fix yet", then send a string comprised of the lat/long coordinates to it when the location changes.
回答6:
Maybe this is more clear. I will change the conditional to something more efficient later if it is possible
double longitude = 0;
double latitude = 0;
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (lm.getLastKnownLocation(LocationManager.GPS_PROVIDER) != null) {
Location location = lm
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
longitude = location.getLongitude();
latitude = location.getLatitude();
} else {
Location location = lm
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
longitude = location.getLongitude();
latitude = location.getLatitude();
}
回答7:
There are two types of location providers, GPS Location Provider Network Location Provider
package com.shir60bhushan.gpsLocation;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.widget.TextView;
import android.util.Log;
public class MainActivity extends Activity implements LocationListener{
protected LocationManager locationManager;
protected LocationListener locationListener;
protected Context context;
TextView txtLat;
String lat;
String provider;
protected String latitude,longitude;
protected boolean gps_enabled,network_enabled;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtLat = (TextView) findViewById(R.id.textview1);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
}
@Override
public void onLocationChanged(Location location) {
txtLat = (TextView) findViewById(R.id.textview1);
txtLat.setText("Latitude:" + location.getLatitude() + ", Longitude:" + location.getLongitude());
}
@Override
public void onProviderDisabled(String provider) {
Log.d("Latitude","disable");
}
@Override
public void onProviderEnabled(String provider) {
Log.d("Latitude","enable");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d("Latitude","status");
}
}
This Link can help you for more information http://androidtutorials60.blogspot.in/2013/09/gps-current-location-of-device.html
来源：https://stackoverflow.com/questions/8757238/how-to-get-the-current-location-latitude-and-longitude-of-android-mobile-device