ROTATE Google-Map to display my real-time DIRECTION

Question

I am using the Google Maps Android API v2 where I display my Device location as a GoogleMap Marker on a Map. I have a listener (LocationServices.FusedLocationApi.requestLocationUpdates...) attach to the Map in order to handle every GPS location change. Every time I receive a new location I update the Marker (my position) as well as the Camera on the Map and pretty much it shows like I am moving as I drive.

However... I need some help in order to have the MAP rotate and/or display on the same direction that I am moving to. I mean, while I drive I need to rotate the MAP where I can see on my map-left-side what I have on my real-life-left-side, and so the same with the right. Since the MAP direction is static, the Marker (Me) is moving on it but most of the time the direction does not match my car real-time direction.

What should I do with the Map in order to accomplish this visual effect?

Answer 1

I was guessing how is posible that the Google Map API does not provide such common visual effect desire. I was wrong... it's called BEARING.

private void updateCameraBearing(GoogleMap googleMap, float bearing) {
    if ( googleMap == null) return;
    CameraPosition camPos = CameraPosition
            .builder(
                    googleMap.getCameraPosition() // current Camera
            )
            .bearing(bearing)
            .build();                   
    googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(camPos)); 
}

Since I setup my location changes to be notified every 2 seconds...

    mLocationRequest = LocationRequest.create()
                        .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                        .setInterval(POLLING_FREQ_2SECONDS)
                        .setFastestInterval(FASTEST_UPDATE_FREQ_2_SECONDS)

I use that same place to process the new location as well as to update the Camera (new BEARING):

public void onLocationChanged(Location location) {

 // ... process location

 updateCameraBearing(googleMap, location.getBearing());
}

TESTED + WORKING = DONE!