Android's most accurate Location API

Question

In order to work, my app requires a location API. I intend use the Mapbox platform to customize its design (since Google Maps does not provide this level of customization, a

Answer 1

In android also there are three types of location :

1. GPS_PROVIDER
2. NETWORK_PROVIDER
3. PASSIVE_PROVIDER

So, as per my coding experience I came to know that if you use :

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 10, new MyLocationListener());

you will get precision upto 14+ decimal places.

But if you use fusion of them like this :

LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, my_google_listener);

you will get precision upto 6 to 7 decimal places. try it !!! reference

But note few things here that, GPS Provider takes time to fetch location while Google Location is much faster as it gets data from API call to its google server database.

GPS works offline while google provider gets the location via mobile or wifi data.

Answer 2

Use FusedLocationProviderApi and set LocationRequest priority to PRIORITY_HIGH_ACCURACY

This is newest API for accurate location fetch and google suggest to use the same.

Check Accuracy details here.

Basically Google play services API has intelligence to get accurate location by fusing GPS+NetworkProvider+passive providers.

Answer 3

You should use LocationManager for accuracy. Also you can use this class.

//GPSTracker.java
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;

public class GPSTracker 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
boolean canGetLocation = false;

Location location; // location
double latitude; // latitude
double longitude; // longitude
float bearing; // bearing

// 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;

public GPSTracker(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;
            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();
                        bearing = location.getBearing();
                    }
                }
            }
            // 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();
                            bearing = location.getBearing();
                        }
                    }
                }
            }
        }

    } 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(GPSTracker.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;
}

public float getBearing() {
    if (location != null) {
        bearing = location.getBearing();
    }
    return bearing;
}

/**
 * Function to check GPS/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}

/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch Settings Options
 * */
public void showSettingsAlert(){
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

    // On pressing Settings button
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,int which) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });

    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });

    // Showing Alert Message
    alertDialog.show();
}

@Override
public void onLocationChanged(Location location) {
}

@Override
public void onProviderDisabled(String provider) {
}

@Override
public void onProviderEnabled(String provider) {
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

}

//MainActivity.java
GPSTracker gps = new GPSTracker(MainActivity.this);

Answer 4

FusedLocationProviderApi is deprecated.You should use FusedLocationProviderClient and you should add ACCESS_FINE_LOCATION permission,not ACCESS_COARSE_LOCATION to get the most accurate location.

And read this article to understand why FusedLocationProviderClient is the best solution.

Answer 5

In my experience, the Google Services Location API are preferable to use in following aspects:

• they deal with user settings, choosing the best available location provider. If you choose to work with LocationManager directly, your code will need to handle that.
• you might expect to get a better location with less power usage, as Google regularly updates their algorithms for determining location using WiFi, cell towers, etc.

In my experience, using Google Services, location with accuracy sufficient for a mapping application (that is some tens meters) in many cases does not require GPS data. That might also be the case with FusedLocationProvider, though, maybe with an exception for the battery usage numbers.

To conclude, if you don't have arguments to NOT use Google Services (such as - you target a country where they are not available, or want to distribute via alternative markets) you should use their Location API.