Try this in your app.component.ts after your constructor :
initializeApp() {
this.platform.ready().then(() => {
// Okay, so the platform is ready and our plugins are available.
// Here you can do any higher level native things you might need.
StatusBar.styleDefault();
Splashscreen.hide();
});
}
and I also posted a fix to this global problem :
How to solve White Splash Screen Problem on Android ! =)