Flutter/Flame game homepage or homeview inconsistency - flutter

Question

I have a home-view and in this homeview I have placed my homepage pic, start and settings buttons.
When I run my game in the first opening, homepage pic is shown smaller and the buttons are not shown.
But if i click on restart in the emulator everything looks normal and well-sized. In a real android device homepage pic always smaller and the buttons are not shown.
Util flameUtil = Util();
await flameUtil.fullScreen();
await flameUtil.setLandscapeLeftOnly();
I want to prefer landscape left only.
void resize(Size size) {
screenSize = size;
tileSize = screenSize.width / 9;}
this is my resize method.
titleRect = Rect.fromLTWH(0,
0,
game.tileSize*10,
game.tileSize*5);
titleSprite = Sprite('uipics/homepage.png');
my homepage pic
rect = Rect.fromLTWH(game.tileSize*5,
(game.screenSize.height) - (game.tileSize*1.5),
game.tileSize*0.9,
game.tileSize*0.8);
sprite = Sprite('uipics/playbutton.png');
my start(play) button.
rect = Rect.fromLTWH(game.tileSize*7.2,
game.screenSize.height - (game.tileSize *1.5),
game.tileSize*0.9,
game.tileSize*0.8);
my settings button.
as I mentioned, if i click on restart in my IDE(vsc) everthing is automatically fixed and I can play my game without any problem. but in the first running and in an android device it is problematic. I have tried changing the sizes and the positions but it never worked successfully. Thank you for your help in advance.

Answer 1

You have to run the await flameUtil.fullScreen(); and setLandscapeLeftOnly(); before you do runApp, something like this:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
SharedPreferences storage = await SharedPreferences.getInstance();
await Flame.util.fullScreen();
await Flame.util.setLandscapeLeftOnly();
TheGame game = TheGame(storage);
runApp(game.widget);
}