Hide Splashscreen on api versions lower than 31

I am kinda new to java and android studio and I tryed to add a splashscreen to my app, but the problem is that animated drawables - splaschscreens are not supported by older versions of android, so I wanted to hide it for lower versions. I have made an if- condtion to hide it, however it keeps on showing anyways and crashes the app after it. Is there a possibility to fix it?

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
            SplashScreen.installSplashScreen(this);
            try {
                sleep(550);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        setContentView(R.layout.activity_main);
    }
}

p.s sorry for my english