Publishing Android Location on a Live-Updating Map (MapBox)

1.bash

<dependency>
  <groupId>com.pubnub</groupId>
  <artifactId>pubnub-gson</artifactId>
  <version>4.14.0</version>
</dependency>

10.java

private void updateCamera() {
    mMapView.setCameraDistance(10);
    mMapView.setCenter(mLatLng);
}

2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical" >

    <com.mapbox.mapboxsdk.views.MapView
        android:id="@+id/mapview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:mapid="Your Map ID Here" />

</LinearLayout>

3.java

private Pubnub mPubnub;

@Override
protected void onCreate(Bundle savedInstanceState) {
    [ . . . ]
    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("demo");
    pnConfiguration.setPublishKey("demo");
     
    mPubnub = new PubNub(pnConfiguration);
    try {
      mPubnub.subscribe()
        .channels(Arrays.asList("my_channel")) // subscribe to channels
        .execute();
      mPubnub.addListener(subscribeCallback);
    } catch (PubnubException e) {
      Log.e(TAG, e.toString());
    }
}

4.java

SubscribeCallback subscribeCallback = new SubscribeCallback() {
    @Override
    public void status(PubNub pubnub, PNStatus status) {        
    }
 
    @Override
    public void message(PubNub pubnub, PNMessageResult message) {
        Log.d(PUBNUB_TAG, "Message Received: " + message.toString());
    }
 
    @Override
    public void presence(PubNub pubnub, PNPresenceEventResult presence) {
 
    }
};

5.java

private MapView mMapView;

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

    // Get MapView
    mMapView = (MapView) findViewById(R.id.mapview);
    initializePolyline();

    // Start PubNub
    [ . . . ]
}

6.java

private PathOverlay mLine;

private void initializePolyline() {
    mLine = new PathOverlay(Color.BLUE, 5);
}

7.java

private LatLng mLatLng;

Callback subscribeCallback = new Callback() {

    @Override
    public void successCallback(String channel, Object message) {
        JSONObject jsonMessage = (JSONObject) message;
        try {
            double mLat = jsonMessage.getDouble("lat");
            double mLng = jsonMessage.getDouble("lng");
            mLatLng = new LatLng(mLat, mLng);
        } catch (JSONException e) {
            Log.e(TAG, e.toString());
        }

        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                updatePolyline();
                updateCamera();
                updateMarker();
            }
        });
    }
};

8.java

private void updatePolyline() {
    mMapView.removeOverlay(mLine);
    mLine.addPoint(mLatLng);
    mMapView.getOverlays().add(mLine);
}

9.java

private boolean isFirstMessage = true;

private void updateMarker() {
    if (!isFirstMessage) {
        mMapView.removeMarker(mMarker);
    }
    isFirstMessage = false;
    mMarker = new Marker(mMapView, "", "", mLatLng);
    mMapView.addMarker(mMarker);
}