Sending info from a receiver in a service class to main activity class

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.testbed.projects.stackoverflow">
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name=".BackgroundService">
    </service>

    </application>

</manifest>

BackgroundService.java

package com.testbed.projects.stackoverflow;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.util.Log;

/**
 * The service will Run in background
 * mTickReceiver will call onReceive every minute
 * onReceive will send a broadcast intent with data
 * that broadcast intent will be received by MainActivity
 * hence data from receiver (in a service) to mainactivity is sent successfully
 */
public class BackgroundService extends Service {
    private static BroadcastReceiver mTickReceiver;

    public BackgroundService()
    {

    }



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

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return START_STICKY;
    }

    @Override
    public void onCreate()
    {
        registerReceiver();
    }

    @Override
    public void onDestroy()
    {
        unregisterReceiver(mTickReceiver);
        mTickReceiver = null;
    }



    private void registerReceiver()
    {
        
        // THIS IS RECEIVER
        mTickReceiver = new BroadcastReceiver()
        {
            @Override
            public void onReceive(Context context, Intent intent)  // this will fire every minute
            {
              
              // sample data
               double SampleLatitude=52.01566;
                double SampleLongitude=65.00487;

                // assuming above coordinates are from some location manager code
                Intent i=new Intent();
                i.setAction("LocationData");
                i.putExtra("Latitude",SampleLatitude);
                i.putExtra("Longitude",SampleLongitude);
                // PREPARE BROADCAST FOR MAINACTIVITY
                sendBroadcast(i);  // this broadcast will be received by mainactivity

            }
        };
        IntentFilter filter = new IntentFilter(Intent.ACTION_TIME_TICK); // this will broadcast Intent every minute
        registerReceiver(mTickReceiver, filter);
    }




}

MainActivity.java

package com.testbed.projects.stackoverflow;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.location.Location;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
/**
 * since MyBroadcast receiver is inner class, any data it receives can be saved in MainActivity's "final" declared variables.
 * hence we receive data in MainActivity from a service/receiver
 */


public class MainActivity extends AppCompatActivity {



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       Intent i=new Intent(this, BackgroundService.class);
        startService(i);
        IntentFilter filter = new IntentFilter("LocationData");
        registerReceiver(new MyBroadcastReceiver(),filter);

    }

    class MyBroadcastReceiver extends BroadcastReceiver
    {
      @Override
      public void onReceive(Context context, Intent intent)
    {
        // GET BROADCAST FROM RECEIVER IN THE BACKGROUND SERVICE CLASS
        if (intent.getAction() == "LocationData")
        {
            double lat=intent.getDoubleExtra("Latitude",0);
            double lng=intent.getDoubleExtra("Longitude",1);

            String LocationDataFromService=lat+","+lng;

            Log.d("LocationDataFromService",LocationDataFromService);  // this works, it is checked


        }
    }
}
}