当我使用导航组件时，在启动片段之前显示 3 秒的空白屏幕？

Question

I have an Activity to navigate the splash fragment in default but before showing splash fragment show a blank screen for three seconds and then show the splash fragment. While I used the Navigation Component for fragment navigation. Please correct me if anyone knows.

NavHostFragment navHostFragment;
NavController navController;
navHostFragment = (NavHostFragment) getSupportFragmentManager().findFragmentById(R.id.nav_host_fragment);
        if (navHostFragment != null) {
            navController = navHostFragment.getNavController();
        }
        navController.navigate(R.id.splashFragment);

Answer 1

I solve my problem by adding this line to the activity theme.

<item name="android:windowIsTranslucent">true</item>