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  • GPS tracking in android tutorial

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    If you want to integrate GPS tracked latitude longitude to your application, then u need to add a GPS module to your program to make your app more smarter ,to automatically get the GPS tracked location in your app.

    In this tutorial I will explain to o work with GPS / Location API.

    Add permissions in AndroidManifest.xml file

    Create a new project in Eclipse File New Android Project and fill the required details. Add ACCESS_FINE_LOCATION and Internet permission to the manifest file.

    Then create a file the GPStracker.java.

    package com.searchoffers.android;
    
    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.LocationManager;
    import android.os.Bundle;
    import android.os.IBinder;
    import android.util.Log;
    
    import com.facebook.Settings;
    import com.google.android.gms.location.LocationListener;
    
    
    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
    
        // 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;
                    // First get location from Network Provider
                    if (isNetworkEnabled) {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, (android.location.LocationListener) 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, (android.location.LocationListener) 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((android.location.LocationListener) 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;
        }
    
        /**
         * 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) {
        }
    
        public void onProviderDisabled(String provider) {
        }
    
        public void onProviderEnabled(String provider) {
        }
    
        public void onStatusChanged(String provider, int status, Bundle extras) {
        }
    
        @Override
        public IBinder onBind(Intent arg0) {
            return null;
        }
    
    }
    

    To use this class for tracking the GPS Location, make the object of the class then call the getLatitude() and getLongitude functions.

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