我正在尝试从我的“用户”集合中获取文档，但是它将其返回为null。请看看我的收藏和文件 My collection
以下是我的代码
private void gettingCurrentUser(){
String currentUserEmail = firebaseAuth.getCurrentUser().getEmail();
DocumentReference docRef = firebaseFirestore.collection("users").document(currentUserEmail);
docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if(task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if(document.exists()) {
test = document.getString("FirstName");
}
else {
Log.e(TAG, "Error message", task.getException());
}
}
}
});
}
我也尝试过一个字段一个字段，但是没有用
private void gettingCurrentUser(){
String currentUserEmail = firebaseAuth.getCurrentUser().getEmail();
DocumentReference docRef = firebaseFirestore.collection("users").document(currentUserEmail);
docRef.get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
@Override
public void onSuccess(DocumentSnapshot documentSnapshot) {
String firstName = documentSnapshot.getData().get("FirstName").toString();
String lastName = documentSnapshot.getData().get("LastName").toString();
String emailAddress = documentSnapshot.getData().get("EmailAddress").toString();
String dob = documentSnapshot.getData().get("DOB").toString();
String address1 = documentSnapshot.getData().get("Address1").toString();
String address2 = documentSnapshot.getData().get("Address2").toString();
String city = documentSnapshot.getData().get("City").toString();
String country = documentSnapshot.getData().get("Country").toString();
String phonenumber = documentSnapshot.getData().get("Phonenumber").toString();
User user = new User(firstName, emailAddress, lastName, phonenumber, address1, address2, city, country,dob);
adminUser = user;
}
});
}
我认为这与对集合的异步调用有关，但是我不确定。正如您在我的log中所看到的，它确实返回了文档，但是由于某些原因，在为其分配“ adminUser”时始终为null。如果您能帮助我，也给我一些有关异步调用的指导，我将不胜感激。提前非常感谢您！
以下是当我尝试从集合中获取文档时指向我的日志的链接
https://wetransfer.com/downloads/2a134aa1396050585b18fa756fd7f48320190401143731/20844c
以下是我的代码，用于在我的一项活动中获取用户的名字，并且效果很好
private void gettingData() {
FirebaseUser user = firebaseAuth.getCurrentUser();
String userEmail = user.getEmail();
final DocumentReference docRef = firebaseFirestore.collection("users").document(userEmail);
final String docPath = docRef.getPath();
docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if(document.exists()) {
Log.d(TAG, "Document Snapshot data: " + document.getData());
firstName = document.getData(). get("FirstName").toString();
textViewFirstName.setText("Welcome " + firstName);
} else {
Log.d(TAG, "No such document");
// Toast.makeText(Home.this, "Failed Registration:2 "+task.getException(), Toast.LENGTH_SHORT).show();
}
} else {
Log.d(TAG, "get failed with ", task.getException());
//Toast.makeText(Home.this, "Failed Registration:3 "+task.getException(), Toast.LENGTH_SHORT).show();
}
}
});
}