我在从Firebase获取用户数据并在TextView / EditText中显示时遇到问题

Question

片段的Oncreate

public class HomeScreen_Profile extends Fragment {
    EditText Name, Email, Status, Quote;
    private FirebaseAuth mAuth;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_profile, container, false);


        Name = (EditText) rootView.findViewById(R.id.Name);
        Email = (EditText) rootView.findViewById(R.id.Email);
        Status = (EditText) rootView.findViewById(R.id.Status);
        Quote = (EditText) rootView.findViewById(R.id.Quote);

        mAuth = FirebaseAuth.getInstance();
        loadUserInformation();
        return rootView;
    }
}

LoadUserInfo方法

public void loadUserInformation() {

    final String uid = mAuth.getCurrentUser().getUid();
    DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference().child(uid);
    DatabaseReference uidRef = rootRef.child("ref").child(uid);
    ValueEventListener eventListener = new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
                SetUpProfileHelper obj = postSnapshot.getValue(SetUpProfileHelper.class);

                String UserName = obj.getName();
                String UserEmail = obj.getEmail();

                Name.setText(UserName);
                Email.setText(UserEmail);
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Toast.makeText(getActivity(), "Error Loading UserDetails", Toast.LENGTH_LONG).show();
        }
    };
    uidRef.addListenerForSingleValueEvent(eventListener);
}

为了检查工作，我在方法中只使用了getName和getEmail。我没有问题保存userinfo，但是获取它给我带来了困难，因为互联网上的所有教程都在获取它并在我不想要的ListView中显示它。有人能指出这段代码中的错误吗？

Answer 1

位置错误，你在数据库中有这个：

  rootnode
        Users
           uid
            name:Userx
            email:[email protected]
            phonenumber: number_here

你想得到name和email

这样做：

public void loadUserInformation() {

final String uid = mAuth.getCurrentUser().getUid();
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference().child("Users");
ValueEventListener eventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
     for(DataSnapshot postSnapshot: dataSnapshot.getChildren()){
            String name=postSnapshot.child("Name").getValue().toString(); 
            String email=postSnapsoht.child("Email").getValue().toString()

        }
    }

   @Override
    public void onCancelled(DatabaseError databaseError) {
        Toast.makeText(getActivity(), "Error Loading UserDetails", Toast.LENGTH_LONG).show();
    }
};
rootRef.addListenerForSingleValueEvent(eventListener);
}

由于uid位于Users节点下（所以直接child）并且因为你想要检索uid然后只是做一个for循环以便能够获得你需要的数据。