#SplashScreen
SharedPreferences sp = getSharedPreferences("DATALOGIN", MODE_PRIVATE);
                SharedPreferences.Editor e = sp.edit();
                boolean firstTime = sp.getBoolean("first_time", true);
                String id_user = sp.getString("id_user",""); #TAMBAHAN
                if (id_user!=""){ #TAMBAHAN
                    startActivity(new Intent(Splashscreen.this, HomeActivity.class));
                }
                else if (firstTime) {
                    startActivity(new Intent(Splashscreen.this, IntroActivity.class));
                } else {
                    //setelah loading maka akan langsung berpindah ke home activity
                    Intent home=new Intent(Splashscreen.this, MainActivity.class);
                    startActivity(home);
                }