Android Location Services Using GPS BackGround Service to Update

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;


public class MainActivity extends AppCompatActivity {

    private ArrayList<String> permissionsToRequest;
    private ArrayList<String> permissionsRejected = new ArrayList();
    private ArrayList<String> permissions = new ArrayList();

    private final static int ALL_PERMISSIONS_RESULT = 101;
    LocationTrack gpsTracker;
    List<Address> addresses;
    Geocoder geocoder;

    private TextView displayTv,displayAddress;
    private static final String TAG = MainActivity.class.getSimpleName();
    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        displayTv = (TextView)findViewById(R.id.tvDisplay);
        displayAddress = (TextView)findViewById(R.id.tvAddress);
        try {
            if (ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ) {
                ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, 101);
            }
        } catch (Exception e){
            e.printStackTrace();
        }
        gpsTracker = new LocationTrack(MainActivity.this);
        if(gpsTracker.canGetLocation()){
            double latitude = gpsTracker.getLatitude();
            double longitude = gpsTracker.getLongitude();
            displayTv.setText(String.valueOf(latitude)+"   "+String.valueOf(longitude));

        }else{
            gpsTracker.showSettingsAlert();
        }



        LocalBroadcastManager.getInstance(this).registerReceiver(
                new BroadcastReceiver() {
                    @Override                    public void onReceive(Context context, Intent intent) {
                        String latitude = intent.getStringExtra(LocationTrack.EXTRA_LATITUDE);
                        String longitude = intent.getStringExtra(LocationTrack.EXTRA_LONGITUDE);

                        if (latitude != null && longitude != null) {
                            displayAddress.setText("Service started" + "\n Latitude : " + latitude + "\n Longitude: " + longitude);

                        }
                    }
                }, new IntentFilter(LocationTrack.ACTION_LOCATION_BROADCAST)
        );
    }








}

 

 

import android.Manifest;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
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.support.v4.app.ActivityCompat;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.widget.Toast;

import java.util.List;

import static android.content.ContentValues.TAG;


/** * Created by namratha.asher on 12/21/2018. */
public class LocationTrack 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 static final String ACTION_LOCATION_BROADCAST = LocationTrack.class.getName() + "LocationBroadcast";
    public static final String EXTRA_LATITUDE = "extra_latitude";
    public static final String EXTRA_LONGITUDE = "extra_longitude";
    public LocationTrack(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);
          //  isGPSEnabled = false;            // getting network status           /* isNetworkEnabled = locationManager                    .isProviderEnabled(LocationManager.NETWORK_PROVIDER);*/            isNetworkEnabled = false;
            if (!isGPSEnabled && !isNetworkEnabled) {
                // no network provider is enabled            } else {
                this.canGetLocation = true;
                // First get location from Network Provider                if (isNetworkEnabled) {
                    //check the network permission                    if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                        ActivityCompat.requestPermissions((MainActivity) mContext, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, 101);
                    }
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            0,
                            0, this);
                    Log.d("Network", "Network");
                    if (locationManager != null) {
                       /* location = locationManager                                .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);*/                        List<String> providers = locationManager.getProviders(true);
                        Location bestLocation = null;

                        for (String provider : providers) {
                            Location l = locationManager.getLastKnownLocation(provider);
                            if (l == null) {
                                continue;
                            }
                            if (bestLocation == null || l.getAccuracy() < bestLocation.getAccuracy()) {
                                // Found best last known location: %s", l);                                bestLocation = l;
                            }
                        }

                        if (bestLocation != null) {
                            latitude = bestLocation.getLatitude();
                            longitude = bestLocation.getLongitude();
                        }
                    }
                }
                // if GPS Enabled get lat/long using GPS Services                if (isGPSEnabled) {
                    if (location == null) {
                        //check the network permission                        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                            ActivityCompat.requestPermissions((MainActivity) mContext, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, 101);
                        }
                        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(LocationTrack.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();
            }
        });
        alertDialog.show();
    }
    @Override    public void onLocationChanged(Location location) {
        Log.v("TEST****", "IN ON LOCATION CHANGE, lat=" + latitude + ", lon=" + longitude);
//        Toast.makeText(this,"Loc",Toast.LENGTH_LONG).show();        if (location != null) {
            Log.d(TAG, "== location != null");

            //Send result to activities            sendMessageToUI(String.valueOf(location.getLatitude()), String.valueOf(location.getLongitude()));
        }
    }

    private void sendMessageToUI(String lat, String lng) {

        Log.d(TAG, "Sending info...");

        Intent intent = new Intent(ACTION_LOCATION_BROADCAST);
        intent.putExtra(EXTRA_LATITUDE, lat);
        intent.putExtra(EXTRA_LONGITUDE, lng);
        LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
    }
    @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;
    }
}

 

Layout

 

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    tools:context=".MainActivity"    android:layout_height="match_parent">

    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/btn"        android:layout_centerInParent="true"        android:text="GET LOCATION" />

    <TextView        android:id="@+id/tvDisplay"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/btn"        android:layout_centerHorizontal="true"        android:layout_marginTop="39dp"        android:text="TextView" />

    <TextView        android:id="@+id/tvAddress"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_alignStart="@+id/btn"        android:layout_marginStart="15dp"        android:layout_marginTop="75dp"        android:text="TextView" />
</RelativeLayout>