从service启动activity startActivity慢 的解决方案

Intent intent = new Intent(context, A.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                PendingIntent pendingIntent =
                        PendingIntent.getActivity(context, 0, intent, 0);
                try {
                    pendingIntent.send();
                } catch (PendingIntent.CanceledException e) {
                    e.printStackTrace();
                }