Android启动页沉浸式并隐藏状态栏和导航栏

//设置布局延伸到刘海屏内，没此处设置会导致小米手机顶部导航栏显示黑色。
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
    try {
        WindowManager.LayoutParams lp = window.getAttributes();
        lp.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES;
        window.setAttributes(lp);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.getDecorView().setSystemUiVisibility(
        View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.INVISIBLE);
//设置状态栏和导航栏颜色为透明
window.setStatusBarColor(Color.TRANSPARENT);
window.setNavigationBarColor(Color.TRANSPARENT);

Activity样式设置

<style name="LauncherActivityTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowAnimationStyle">@style/notAnimation</item>
    <item name="android:windowBackground">@drawable/loading_bg</item>
    <item name="android:windowDisablePreview">false</item>
    <item name="android:navigationBarColor">@color/transparent</item>
    <item name="android:statusBarColor">@color/transparent</item>
</style>