Java版本

Intent intent = new Intent(this, SplashAct.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
android.os.Process.killProcess(android.os.Process.myPid());

Kotlin版本

val intent = Intent(this, SplashActivity::class.java)
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
startActivity(intent)
android.os.Process.killProcess(android.os.Process.myPid())