First launch of Activity with Google Maps is very slow

Question

I want to have SupportMapFragment in one of my Activity. I add this fragment directly to layout xml and this layout set as content view. But when Activity is launched for th

Answer 1

Similar to the other solutions here, but using RxJava + RxAndroid.

Just call this snippet from the launcher activity onCreate.

Observable.fromCallable(new Callable() {
    @Override
    public Void call() {
        MapView mapView = new MapView(LaunchActivity.this); // Replace LaunchActivity with appropriate activity's name
        mapView.onCreate(null);
        return null;
    }
}).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(
    new Action1() {
        @Override
        public void call(Void ignorable) {
            Log.i("Google Maps", "Initialised Google Maps.");
        }
    }, new Action1() {
        @Override
        public void call(Throwable ignorable) {
            Log.w("Google Maps", "[EXPECTED] Initialized Google Maps but got: " + ignorable.getMessage());
        }
    });