我正在尝试从Google Firestore数据库中获取当前登录的用户我在用户的stackoverflow中看到了同样的问题，我使用了相同的方法，但显示了空白的用户详细信息。
请帮助我。
我较早使用querysnapshot，因为它给了所有用户。
图像描述在这里
数据库的图像是在此处输入图像描述
代码是：
public class UserProfile extends AppCompatActivity {
static final int REQUEST_IMAGE_CAPTURE = 1;
static final int GALLERY_INTENT = 2;
private static final String TAG = "UserProfile";
String UserId;
FirebaseAuth auth;
ImageButton Photo;
ImageView photoview;
TextView name, email, password, phone;
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_profile);
if(getSupportActionBar()!=null ){
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
DatabaseReference Database = FirebaseDatabase.getInstance().getReference("users");
DatabaseReference DBRef = Database.child("users");
auth = FirebaseAuth.getInstance();
UserId = auth.getCurrentUser().getUid();
FirebaseFirestore mFirestore = FirebaseFirestore.getInstance();
StorageReference mStorage = FirebaseStorage.getInstance().getReference();
FirebaseStorage storage = FirebaseStorage.getInstance();
photoview = (ImageView)findViewById(R.id.photoview);
Photo = (ImageButton)findViewById(R.id.Photoedit);
name = (TextView)findViewById(R.id.username);
email = (TextView)findViewById(R.id.useremail);
password = (TextView)findViewById(R.id.password1);
phone = (TextView)findViewById(R.id.userPhone);
mFirestore.collection("users").document(UserId).get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
@Override
public void onSuccess(DocumentSnapshot documentSnapshot) {
String Name = documentSnapshot.getString("Name");
String Email = documentSnapshot.getString("Email");
String Password = documentSnapshot.getString("Password");
String Phone = documentSnapshot.getString("Phone Number");
name.setText(Name);
email.setText(Email);
password.setText(Password);
phone.setText(Phone);
}
});
Photo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectImage();
}
});
}
private void selectImage() {
final CharSequence[] options = { "Take Photo", "Choose from Gallery","Cancel" };
AlertDialog.Builder builder = new AlertDialog.Builder(UserProfile.this);
builder.setTitle("Add Photo!");
builder.setItems(options, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (options[item].equals("Take Photo"))
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
}
else if (options[item].equals("Choose from Gallery"))
{
Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, GALLERY_INTENT);
}
else if (options[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap photo = (Bitmap) extras.get("data");
photoview.setImageBitmap(photo);
} else if (requestCode == GALLERY_INTENT && resultCode == RESULT_OK) {
Uri selectedImage = data.getData();
String[] filePath = {MediaStore.Images.Media.DATA};
Cursor c = getContentResolver().query(selectedImage, filePath, null, null, null);
c.moveToFirst();
int columnIndex = c.getColumnIndex(filePath[0]);
String picturePath = c.getString(columnIndex);
c.close();
Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));
Log.w("path of image ", picturePath + "");
photoview.setImageBitmap(thumbnail);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == android.R.id.home) {
Intent i = new Intent(UserProfile.this,category.class);
startActivity(i);
finish();
}
return super.onOptionsItemSelected(item);
}
}
我的数据库结构是
Ramiki(我的应用名称(所以这里是
Ramiki --> users(collection)--> SiQEIDaQJfUBqZBBt1eo(document uid)----> fields(Email, Name, Password, Phone Number).
很抱歉，我无法给出屏幕示威，因为堆栈溢出不允许10分。
和我在Firestore编写数据的代码是
public class LoginActivity extends AppCompatActivity implements View.OnClickListener,
GoogleApiClient.OnConnectionFailedListener {
private static final String TAG = "LoginActivity";
private TextInputEditText textInputEditTextName;
private TextInputEditText textInputEditTextEmail;
private TextInputEditText textInputEditTextPassword;
private TextInputEditText textInputEditTextConfirmPassword;
private TextInputEditText textInputEditTextPhone;
private AppCompatButton appCompatButtonRegister;
private AppCompatTextView appCompatTextViewLoginLink;
private FirebaseAuth auth;
private ProgressBar progressBar;
private static final int RC_SIGN_IN = 1;
private GoogleApiClient mGoogleApiClient;
private SignInButton btnSignIn;
private FirebaseFirestore mFirebaseFirestore;
private FirebaseAuth.AuthStateListener authListener;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
auth = FirebaseAuth.getInstance();
mFirebaseFirestore = FirebaseFirestore.getInstance();
FirebaseFirestoreSettings settings = new FirebaseFirestoreSettings.Builder()
.setPersistenceEnabled(true)
.build();
mFirebaseFirestore.setFirestoreSettings(settings);
authListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
}
};
btnSignIn = (SignInButton) findViewById(R.id.btn_sign_in);
btnSignIn.setOnClickListener(this);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
// Customizing G+ button
btnSignIn.setSize(SignInButton.SIZE_STANDARD);
btnSignIn.setScopes(gso.getScopeArray());
appCompatTextViewLoginLink = (AppCompatTextView) findViewById(R.id.appCompatTextViewLoginLink);
appCompatTextViewLoginLink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(LoginActivity.this, account.class);
startActivity(i);
finish();
}
});
//if the user is already logged in we will directly start the category activity
if (SavesharedPreferences.getInstance(this).isLoggedIn()) {
finish();
startActivity(new Intent(this, category.class));
finish();
return;
}
findViewById(R.id.appCompatButtonRegister).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String Name = textInputEditTextName.getText().toString().trim();
String Email = textInputEditTextEmail.getText().toString().trim();
String Password = textInputEditTextPassword.getText().toString().trim();
String Phone_Number = textInputEditTextPhone.getText().toString().trim();
String ConfirmPassword = textInputEditTextConfirmPassword.getText().toString().trim();
progressBar.setVisibility(View.VISIBLE);
// Create a new user with a first and last name
Map<String, Object> user = new HashMap<>();
user.put("Name", Name);
user.put("Email", Email);
user.put("Password", Password);
user.put("Phone Number", Phone_Number);
if (TextUtils.isEmpty(Name)) {
textInputEditTextName.setError("Please enter name");
textInputEditTextName.requestFocus();
progressBar.setVisibility(View.GONE);
}
else if (TextUtils.isEmpty(Email)) {
textInputEditTextEmail.setError("Please enter your email");
textInputEditTextEmail.requestFocus();
progressBar.setVisibility(View.GONE);
}
else if (!android.util.Patterns.EMAIL_ADDRESS.matcher(Email).matches()) {
textInputEditTextEmail.setError("Email already exist");
textInputEditTextEmail.requestFocus();
progressBar.setVisibility(View.GONE);
}
else if (TextUtils.isEmpty(Password)) {
textInputEditTextPassword.setError("Enter a password");
textInputEditTextPassword.requestFocus();
progressBar.setVisibility(View.GONE);
}
else if(Password.length() < 7){
textInputEditTextPassword.setError("Paasword must be greater than 7 digits");
textInputEditTextPassword.requestFocus();
progressBar.setVisibility(View.GONE);
}
else if (!textInputEditTextPassword.getText().toString().equals(textInputEditTextConfirmPassword.getText().toString())) {
textInputEditTextPassword.setError("Password Doesn't Match");
textInputEditTextPassword.requestFocus();
progressBar.setVisibility(View.GONE);
}
else {
// Add a new document with a generated ID
mFirebaseFirestore.collection("users")
.add(user)
.addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
@Override
public void onSuccess(DocumentReference documentReference) {
registerUser();
Log.d(TAG, "DocumentSnapshot added with ID: " + documentReference.getId());
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Log.w(TAG, "Error adding document", e);
}
});
}
}
});
initViews();
}
@Override
public void onClick(View view) {
int id = view.getId();
switch (id) {
case R.id.btn_sign_in:
signIn();
break;
}
}
private void registerUser() {
final String Name = textInputEditTextName.getText().toString().trim();
final String Email = textInputEditTextEmail.getText().toString().trim();
final String Password = textInputEditTextPassword.getText().toString().trim();
final String Phone_Number = textInputEditTextPhone.getText().toString().trim();
final String ConfirmPassword = textInputEditTextConfirmPassword.getText().toString().trim();
//first we will do the validations
if (TextUtils.isEmpty(Name)) {
textInputEditTextName.setError("Please enter name");
textInputEditTextName.requestFocus();
return;
}
if (TextUtils.isEmpty(Email)) {
textInputEditTextEmail.setError("Please enter your email");
textInputEditTextEmail.requestFocus();
return;
}
if (!android.util.Patterns.EMAIL_ADDRESS.matcher(Email).matches()) {
textInputEditTextEmail.setError("Email already exist");
textInputEditTextEmail.requestFocus();
return;
}
if (TextUtils.isEmpty(Password)) {
textInputEditTextPassword.setError("Enter a password");
textInputEditTextPassword.requestFocus();
return;
}
if(Password.length() < 7 ) {
textInputEditTextPassword.setError("Paasword must be greater than 7 digits");
textInputEditTextPassword.requestFocus();
return;
}
if (TextUtils.isEmpty(ConfirmPassword)) {
textInputEditTextPassword.setError("Password Doesn't Match");
textInputEditTextPassword.requestFocus();
return;
}
progressBar.setVisibility(View.VISIBLE);
//create user
auth.createUserWithEmailAndPassword(Email, Password)
.addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Toast.makeText(LoginActivity.this, "Register Successful " + task.isSuccessful(), Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
if (task.isSuccessful()){
sendEmailVerification();
}
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
else if (!task.isSuccessful()) {
Toast.makeText(LoginActivity.this, "Authentication failed." + task.getException(),
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(LoginActivity.this, "Nothing Happens", Toast.LENGTH_SHORT).show();
}
}
});
}
private void sendEmailVerification() {
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if(user != null){
user.sendEmailVerification().addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if(task.isSuccessful()){
Toast.makeText(LoginActivity.this,"Please Check Your Email For Verification",Toast.LENGTH_LONG).show();
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(LoginActivity.this, account.class));
finish();
}
}
});
}
}
@Override
protected void onResume() {
super.onResume();
progressBar.setVisibility(View.GONE);
}
private void initViews() {
textInputEditTextName = (TextInputEditText) findViewById(R.id.textInputEditTextName);
textInputEditTextEmail = (TextInputEditText) findViewById(R.id.textInputEditTextEmail);
textInputEditTextPassword = (TextInputEditText) findViewById(R.id.textInputEditTextPassword);
textInputEditTextPhone = (TextInputEditText) findViewById(R.id.textInputEditTextPhone);
appCompatTextViewLoginLink = (AppCompatTextView) findViewById(R.id.appCompatTextViewLoginLink);
textInputEditTextConfirmPassword = (TextInputEditText) findViewById(R.id.textInputEditTextConfirmPassword);
appCompatButtonRegister = (AppCompatButton) findViewById(R.id.appCompatButtonRegister);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Toast.makeText(LoginActivity.this, "You Got an Error",Toast.LENGTH_LONG).show();
}
protected void onStart(){
super.onStart();
auth.addAuthStateListener(authListener);
}
private void signIn() {
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
// Google Sign In was successful, authenticate with Firebase
GoogleSignInAccount account = task.getResult(ApiException.class);
firebaseAuthWithGoogle(account);
} catch (ApiException e) {
// Google Sign In failed, update UI appropriately
Log.w(TAG, "Google sign in failed", e);
// ...
}
}
}
private void firebaseAuthWithGoogle(GoogleSignInAccount account) {
Log.d(TAG, "firebaseAuthWithGoogle:" + account.getId());
AuthCredential credential = GoogleAuthProvider.getCredential(account.getIdToken(), null);
auth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
// Sign in success, update UI with the signed-in user's information
Log.d(TAG, "signInWithCredential:success");
FirebaseUser user = auth.getCurrentUser();
} else {
// If sign in fails, display a message to the user.
Log.w(TAG, "signInWithCredential:failure", task.getException());
Toast.makeText(LoginActivity.this, "Authentication Failed", Toast.LENGTH_SHORT).show();
}
// ...
}
});
}
}
当您将用户添加为Map或使用document()方法的调用而无需传递参数时，将生成此唯一的ID SiQEIDaQJfUBqZBBt1eo。
为了解决这个问题，有两种方法。一种是创建一个模型类(usermodel(，然后创建该类的对象，最后在用户身份验证后获取用户的UID，然后将对象添加到此类数据库中：
String Name = textInputEditTextName.getText().toString().trim();
String Email = textInputEditTextEmail.getText().toString().trim();
String Password = textInputEditTextPassword.getText().toString().trim();
String Phone_Number = textInputEditTextPhone.getText().toString().trim();
String ConfirmPassword = textInputEditTextConfirmPassword.getText().toString().trim();
UserModel userModel = new UserModel(Name, Email, Password, Phone_Number, ConfirmPassword);
String uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
CollectionReference usersRef = rootRef.collection("users");
usersRef.document(uid).set(userModel);
看，我已经将uid作为参数传递给document()方法。
第二种方法是将不参数传递给document()方法，而是将该键存储到这样的变量中：
String key = usersRef.document().getKey();
usersRef.document(key).set(userModel);
编辑：
还有另一种方法，我建议您使用它。而不是使用此代码行：
mFirebaseFirestore.collection("users")
.add(user)
.addOnSuccessListener(/* ... */)
使用以下代码行：
mFirebaseFirestore.collection("users")
.document(uid)
.set(user)
.addOnSuccessListener(/* ... */)
删除旧数据，添加新的一个，您的问题将被解决。