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

huangapple
go评论94阅读模式
英文:

Cannot resolve final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

问题

无法解决：

  1. final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

如果我将其更改为：

  1. final FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();

它将无法解决这里的 getUid：

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

如果我将其更改为 FirebaseUser firebaseUser = FirebaseUser.getInstance();，它将无法解决 getInstance()；我该怎么做才能消除这个错误，请帮忙。

  1. private void readUsers() {
  2.     final FirebaseUser firebaseUser = FirebaseAuth.getInstance();
  3.     DatabaseReference reference = FirebaseDatabase.getInstance().getReference("users");
  5.     reference.addValueEventListener(new ValueEventListener() {
  6.         @Override
  7.         public void onDataChange(DataSnapshot dataSnapshot) {
  8.             mUsers.clear();
  9.             for (DataSnapshot snapshot : dataSnapshot.getChildren()){
  10.                 User user = snapshot.getValue(User.class);
  12.                 assert user !=null;
  13.                 assert firebaseUser !=null;
  14.                 if (!user.getUser_id().equals(firebaseUser.getUid())){
  15.                     mUsers.add(user);
  16.                 }
  17.             }
  18.             userAdapter = new UserAdapter(getContext(), mUsers);
  19.             recyclerView.setAdapter(userAdapter);
  20.         }
  22.         @Override
  23.         public void onCancelled(DatabaseError databaseError) {
  25.         }
  26.     });
  27. }
英文:

Cannot reolve

  1. final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

If I change it to

  1. final FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();

it won't resolve the getUid in this

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

And if I change it to FirebaseUser firebaseUser = FirebaseUser.getInstance(); it wont resolve the getInstance(); What can I do to remove the error please help

  1.     private void readUsers() {
  2.         final FirebaseUser firebaseUser = FirebaseAuth.getInstance();
  3.         DatabaseReference reference = FirebaseDatabase.getInstance().getReference("users");
  5.         reference.addValueEventListener(new ValueEventListener() {
  6.             @Override
  7.             public void onDataChange(DataSnapshot dataSnapshot) {
  8.                 mUsers.clear();
  9.                 for (DataSnapshot snapshot : dataSnapshot.getChildren()){
  10.                     User user = snapshot.getValue(User.class);
  12.                     assert user !=null;
  13.                     assert firebaseUser !=null;
  14.                     if (!user.getUser_id().equals(firebaseUser.getUid())){
  15.                         mUsers.add(user);
  16.                     }
  17.                 }
  18.                 userAdapter = new UserAdapter(getContext(), mUsers);
  19.                 recyclerView.setAdapter(userAdapter);
  20.             }
  22.             @Override
  23.             public void onCancelled(DatabaseError databaseError) {
  25.             }
  26.         });
  27.     }

答案1

得分: 1

FirebaseAuth.getInstance() 返回一个 FirebaseAuth 实例，因此这段代码：

  1. final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

应该改成这样：

  1. final FirebaseAuth auth = FirebaseAuth.getInstance();

然后将这段代码：

  1. assert user != null;
  2. assert firebaseUser != null;
  3. if (!user.getUser_id().equals(firebaseUser.getUid())) {
  4.      mUsers.add(user);
  5. }

改成这样：

  1. if (!user.getUser_id().equals(auth.getCurrentUser().getUid())) {
  2.      mUsers.add(user);
  3. }
英文:

FirebaseAuth.getInstance() returns an instance of FirebaseAuth, so this:

  1. final FirebaseUser firebaseUser = FirebaseAuth.getInstance();

should be this instead:

  1. final FirebaseAuth auth = FirebaseAuth.getInstance();

Then change this:

  1. assert user !=null;
  2. assert firebaseUser !=null;
  3. if (!user.getUser_id().equals(firebaseUser.getUid())){
  4.      mUsers.add(user);
  5.  }

into this:

  1. if (!user.getUser_id().equals(auth.getCurrentUser().getUid())){
  2.      mUsers.add(user);
  3. }

huangapple
  • 本文由 发表于 2020年10月13日 17:25:09
  • 转载请务必保留本文链接：https://go.coder-hub.com/64332384.html
  • android
  • firebase
  • firebase-authentication
  • java
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定