Splash Theme Is Not Changing Anymore

I followed this link to create a SplashActivity which displayed a small icon while loading the MainActivity. Everythink worked fine and I could implement the icon successfully. Now

Solution 1:

AppTheme.LauncherTheme should extend one of the Theme.AppCompat themes. I suggest such solution:

<style name="AppTheme.LauncherTheme" parent="AppTheme">