要获取当前用户的是:
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null) {
// User is signed in
} else {
// No user is signed in
}
所以我在第一次活动开始的时候就这样做了:
override fun onCreate(savedInstanceState: Bundle?) {
Log.d(TAG, "⟳ onCreate")
super.onCreate(sa