Question

无法拒绝

final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

如果我将其更改为

final FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();

它不会解析其中的getUid

if (!user.getUser_id().equals(firebaseUser.getUid())){
                    mUsers.add(user);

如果我将其更改为FirebaseUser firebaseUser = FirebaseUser.getInstance();，它将无法解析getInstance（）；我该如何删除错误，请帮忙

    private void readUsers() {
        final FirebaseUser firebaseUser = FirebaseAuth.getInstance();
        DatabaseReference reference = FirebaseDatabase.getInstance().getReference("users");

        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                mUsers.clear();
                for (DataSnapshot snapshot : dataSnapshot.getChildren()){
                    User user = snapshot.getValue(User.class);

                    assert user !=null;
                    assert firebaseUser !=null;
                    if (!user.getUser_id().equals(firebaseUser.getUid())){
                        mUsers.add(user);
                    }
                }
                userAdapter = new UserAdapter(getContext(), mUsers);
                recyclerView.setAdapter(userAdapter);
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });
    }

Answer 1

FirebaseAuth.getInstance()返回FirebaseAuth的实例，因此：

final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

应改为：

final FirebaseAuth auth = FirebaseAuth.getInstance();

然后更改此：

assert user !=null;
assert firebaseUser !=null;
if (!user.getUser_id().equals(firebaseUser.getUid())){
     mUsers.add(user);
 }

对此：

if (!user.getUser_id().equals(auth.getCurrentUser().getUid())){
     mUsers.add(user);
}

无法解析最终的FirebaseUser firebaseUser = FirebaseAuth.getInstance（）;

1 个答案: