java - Firebase 实时数据库更新数据 - Android Java

Question

我正在为 Firebase 中的用户配置文件创建一个编辑页面。我尝试了几种不同的方法。但是我无法更新。只是作为新用户添加到数据库中。

我在警报对话框中获得了新值。请帮我。

我的更新方法代码:

public void editAlert() {
        LayoutInflater layoutInflater = LayoutInflater.from(ProfilePage.this);

        View design = layoutInflater.inflate(R.layout.edit_profile, null);

        final EditText editTextUserName = design.findViewById(R.id.username_editTextProfileEdit);

        final EditText editTextRealName = design.findViewById(R.id.realName_editTextProfileEdit);

        final EditText editTextSurname = design.findViewById(R.id.username_editTextProfileEdit);

        final EditText editTextEmail = design.findViewById(R.id.email_editTextProfileEdit);

        final EditText editTextPassword = design.findViewById(R.id.password_editTextProfileEdit);


        AlertDialog.Builder alertDialoga = new AlertDialog.Builder(ProfilePage.this);
        alertDialoga.setTitle("Edit Profile");
        alertDialoga.setView(design);
        alertDialoga.setPositiveButton("Finish", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                String username = editTextUserName.getText().toString().trim();
                String realName = editTextRealName.getText().toString().trim();
                String surname = editTextSurname.getText().toString().trim();
                String email = editTextEmail.getText().toString().trim();
                String password = editTextPassword.getText().toString().trim();
                String admin = "false";
                String url = "test_url";


                String key = myRef.push().getKey();

                Users user = new Users(key,username,realName,surname,email,password,url,admin);


                HashMap<String,Object> data = new HashMap<>();

                data.put("user_email", email);
                data.put("user_name", realName);
                data.put("user_password", password);
                data.put("user_surname", surname);
                data.put("username", username);

                myRef.child(user.getUser_id()).updateChildren(data);

                Toast.makeText(ProfilePage.this, "Uptaded!", Toast.LENGTH_SHORT).show();
            }
        });

        alertDialoga.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {

            }
        });

        alertDialoga.show();
    }

我的创建用户代码:

  // Sign Up Method
    // Kullanıcı Kayıt etme metodu
    public void signUp(View view) {
        UUID uuid = UUID.randomUUID();
        final String imageName = "ProfileImages/"+uuid+".jpg";
        final ProgressDialog dialog = new ProgressDialog(signupPage.this);
        dialog.setTitle("Creating user record.. ");
        dialog.setMessage("User registration is in progress..");
        dialog.show();
        StorageReference storageReference = mStorageRef.child(imageName);
        storageReference.putFile(image).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                // Url

                StorageReference newReference = FirebaseStorage.getInstance().getReference(imageName);
                newReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                    @Override
                    public void onSuccess(Uri uri) {

                        dowloadURL = uri.toString();

                        if (dowloadURL != null) {
                            mAuth.createUserWithEmailAndPassword(emailText.getText().toString(), passwordText.getText().toString())
                                    .addOnCompleteListener(signupPage.this, new OnCompleteListener<AuthResult>() {
                                        @Override
                                        public void onComplete(@NonNull Task<AuthResult> task) {
                                            if (task.isSuccessful()) /* Kullanıcı girişi başarılı ise bu çalışacak */ {
                                                Toast.makeText(signupPage.this, "User Created", Toast.LENGTH_SHORT).show();
                                                String userName = user_name.getText().toString();
                                                String userSurname = user_surname.getText().toString();
                                                String username = user_username.getText().toString();
                                                String user_email = emailText.getText().toString();
                                                String key = myRef.push().getKey();
                                                String password = user_password.getText().toString();
                                                String imageURL = dowloadURL;

                                                Users user = new Users(key, userName, username, userSurname, user_email, password,imageURL, admin);
                                                myRef.push().setValue(user);
                                                Intent homePage = new Intent(signupPage.this, ProfilePage.class);
                                                startActivity(homePage);
                                                finish();
                                                dialog.dismiss();

                                            } else /* Kullanıcı girişi başarısız ise bu çalışacak */ {
                                               /*Intent signBack = new Intent(signupPage.this, signupPage.class);
                                                startActivity(signBack);
                                                finish(); */
                                                dialog.dismiss();
                                            }



                                        }
                                    }).addOnFailureListener(signupPage.this, new OnFailureListener() {
                                @Override
                                public void onFailure(@NonNull Exception e) {
                                    Toast.makeText(signupPage.this, e.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
                                }
                            });
                        }


                    }
                });


            }
        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(signupPage.this, e.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
            }
        });


    }

顺便说一句，下载网址来自单独的图像选择方法。 我的用户创建代码是这样的。

Answer 1

您的问题是，每次更改配置文件时，您都会创建一个新节点，而不是在您的 firebase 数据库中存储一个常量和有效的 key 。为何如此？那么，你这样做:

String key = myRef.push().getKey();

每次创建一个新节点(这就是推送的原因)并且您获得该节点的 key 。这也是您创建新用户而不是更新帐户资料的原因。正确的做法如下。

在创建用户时获取 key :

String key = FirebaseAuth.getInstance().getCurrentUser().getUid();

使用此键创建用户对象后，执行以下操作:

myRef.child(key).setValue(user);

当您想要更新您的用户时，您可以像创建 key 一样访问 key 。获取所有更新信息和 key 后，然后执行:

myRef.child(key).setValue(data); //For updating

或

myRef.child(key).updateChildren(data); //For updating