在 Map V2上动画汽车标记运动

我正在通过实时位置更新在街道上移动汽车 . 但是汽车面向真正的北方，无论我向哪个方向移动，轴承都会返回0.0 . 是否有任何黑客可以使我的车前方移动我正在移动的方向 . 这是我的代码 .

private void draw_current_location(Location currentlocation) {
        LatLng current = new LatLng(currentlocation.getLatitude(), currentlocation.getLongitude());
        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(current, 15);
        map.animateCamera(cameraUpdate);
        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            return;
        }
        Location calculatedLoc = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if(locationManager.getProvider(LocationManager.GPS_PROVIDER).supportsBearing()) {
            float bearing = calculatedLoc.bearingTo(currentlocation);
            centeredMap(current, bearing);
        }
    }

    void centeredMap(final LatLng lalng, float bearng){
        Location l = new Location("");
        l.setLatitude(lalng.latitude);
        l.setLongitude(lalng.longitude);
        View marker = ((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.custom_marker_layout, null);
        if (customMarker != null) customMarker.remove();
        customMarker = map.addMarker(new MarkerOptions()
                .position(lalng)
                .title("Title")
                .snippet("Description")
                .anchor(0.5f, 0.5f)
                .flat(true)
                .rotation(bearng)
                .icon(BitmapDescriptorFactory.fromResource(R.drawable.customIMAGE)));
        Toast.makeText(getApplicationContext(), String.valueOf(l.getBearing()), Toast.LENGTH_SHORT).show();
        customMarker.setPosition(lalng);
        animation.animateMarker(l, customMarker);
}

更新：现在轴承返回值 . 在我编辑我的代码之后 .

if(locationManager.getProvider(LocationManager.GPS_PROVIDER).supportsBearing()) {
            Location calculatedLoc = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            float bearing = calculatedLoc.bearingTo(currentlocation);
            Toast.makeText(getApplicationContext(), String.valueOf(bearing), Toast.LENGTH_SHORT).show();
            centeredMap(currentlocation, bearing);
        }

但是由于锚（.5f，.5f），标记沿着中心垂直轴旋转，但它不能识别我的汽车标记的前部，因此它不会沿着街道动画 . 汽车只是朝北的静态图像，当我移动时被拖动 . 任何帮助将非常感激 .