如果使用Firebase简单用户名，如何返回用户列表

Question

不确定我是否做错了什么，但使用此apihttps://www.firebase.com/docs/security/simple-login-email-password.html根据返回消息，我可以成功创建一个用户，但在Forge控制台的任何地方都看不到该用户。您如何知道注册了哪些用户？

我应该使用返回的用户ID并在Firebase中创建自己的用户对象，还是不需要进行此复制。我确实需要添加一些额外的用户属性，所以我可能无论如何都需要这样做。

Answer 1

您可以使用Google Identity Toolkit API获取Firebase项目中所有注册用户的列表，此API由Firebase CLI使用，可以通过运行Firebase auth：导出结果文件访问

确保身份工具包API已启用

firebase用户列表。js公司

const serviceAccount = require('path/to/firebase-sdk-json-service-account');

const googleapis = require('googleapis');
const identitytoolkit = googleapis.identitytoolkit('v3');

const authClient = new googleapis.auth.JWT(
    serviceAccount.client_email,
    null,
    serviceAccount.private_key,
    ['https://www.googleapis.com/auth/firebase'],
    null
);

authClient.authorize((err) => {
    if (err) {
        return console.error(err);
    }

    let nextPageToken = undefined;
    let users = [];
    const getAccounts = () => identitytoolkit.relyingparty.downloadAccount({
        auth: authClient,
        resource: {
            targetProjectId: serviceAccount.project_id,
            maxResults: 200,
            nextPageToken: nextPageToken
        }
    }, (e, results) => {
        if (e) {
            return console.error(err);
        }

        users = users.concat(results.users);
        if (results.nextPageToken) {
            nextPageToken = results.nextPageToken;
            return getAccounts();
        } else {
            console.log(users);
        }
    });
    getAccounts();
});

Answer 2

在这里，我创建了一个Android程序，按照Rob为firebase初学者（像我一样）所说的做。此程序首先存储signedUp或signedIn用户的用户名，然后将其显示在列表视图中

重要性。Java语言

public class SignInActivity extends BaseActivity implements View.OnClickListener,View.OnKeyListener{

    private DatabaseReference mDatabase;
    public static FirebaseAuth mAuth;
    private static final String TAG = "MainActivity";

    EditText usernameField;
    EditText passwordField;
    TextView changeSignUpModeTextView;
    Button signUpButton;
    ImageView logo;
    RelativeLayout relativeLayout;

    Boolean signUpModeActive;
    static ArrayList<String> userList = new ArrayList<>();

    @Override
    public void onStart() {
        super.onStart();

        // Check auth on Activity start
        if (mAuth.getCurrentUser() != null) {
            onAuthSuccess(mAuth.getCurrentUser());
        }
    }
    @Override
    public boolean onKey(View view, int i, KeyEvent keyEvent) {

        if(i == keyEvent.KEYCODE_ENTER && keyEvent.getAction() == keyEvent.ACTION_DOWN){
            signUpOrLogIn(view);
        }
         return false;
    }

    @Override
    public void onClick(View view) {

        if(view.getId() == R.id.changeSignUpMode){

            if (signUpModeActive == true){

                signUpModeActive = false;
                changeSignUpModeTextView.setText("Sign Up");
                signUpButton.setText("Log In");

            }else{

                signUpModeActive = true;
                changeSignUpModeTextView.setText("Log In");
                signUpButton.setText("Sign Up");
            }

        }else if(view.getId() == R.id.logo || view.getId() == R.id.relativeLayout){

            InputMethodManager inm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
            inm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),0);

        }

    }


    public void signUpOrLogIn(View view) {

        showProgressDialog();
        String email = usernameField.getText().toString().trim();
        String password = passwordField.getText().toString().trim();

        if (signUpModeActive == true) {
            mAuth.createUserWithEmailAndPassword(email,password)
                    .addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            hideProgressDialog();
                            Toast.makeText(MainActivity.this, "createUserWithEmail:onComplete:" + task.isSuccessful(), Toast.LENGTH_SHORT).show();
                            // 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.
                            if (!task.isSuccessful()) {
                                Toast.makeText(MainActivity.this, "Authentication failed." + task.getException().toString().substring(task.getException().toString().indexOf(" ")),
                                        Toast.LENGTH_SHORT).show();
                                Log.i("Error", task.getException().toString());
                            } else {
                                onAuthSuccess(task.getResult().getUser());
                                showUserList();
                            }
                        }
                    });
        } else {
            mAuth.signInWithEmailAndPassword(email,password)
                    .addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            hideProgressDialog();
                            // 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.
                            if (!task.isSuccessful()) {
                                // there was an error

                                Toast.makeText(MainActivity.this, task.getException().toString(),
                                        Toast.LENGTH_LONG).show();
                            } else

                            {
                                onAuthSuccess(task.getResult().getUser());
                                showUserList();
                            }
                        }
                    });
        }
    }

    public void showUserList(){
        startActivity(new Intent(getApplicationContext(), UserList.class));
        finish();
    }
    private void onAuthSuccess(FirebaseUser user) {
        String username = usernameFromEmail(user.getEmail());

        // Write new user
        writeNewUser(user.getUid(), username, user.getEmail());

        // Go to MainActivity

    }
    private String usernameFromEmail(String email) {
        if (email.contains("@")) {
            return email.split("@")[0];
        } else {
            return email;
        }
    }

    private void writeNewUser(String userId, String name, String email) {
        User user = new User(name, email);

        mDatabase.child("users").child(userId).setValue(user);
        ArrayList<String> userNames = new ArrayList<>();
        userNames.add(name);
        mDatabase.child("usernamelist").setValue(userNames);
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mAuth = FirebaseAuth.getInstance();
        mDatabase = FirebaseDatabase.getInstance().getReference();


        if(mAuth.getCurrentUser()!=null){
            showUserList();
        }

        usernameField = (EditText) findViewById(R.id.username);
        passwordField = (EditText) findViewById(R.id.password);
        changeSignUpModeTextView = (TextView) findViewById(R.id.changeSignUpMode);
        signUpButton = (Button) findViewById(R.id.signupbutton);
        logo = (ImageView)findViewById(R.id.logo);
        relativeLayout= (RelativeLayout)findViewById(R.id.relativeLayout);

        signUpModeActive = true;

        changeSignUpModeTextView.setOnClickListener(this);

        usernameField.setOnKeyListener(this);
        passwordField.setOnKeyListener(this);

        logo.setOnClickListener(this);
        relativeLayout.setOnClickListener(this);



    }
}

用户ist.java

public class UserList extends AppCompatActivity {

    private static final String TAG = "UserList" ;
    private DatabaseReference userlistReference;
    private ValueEventListener mUserListListener;
    ArrayList<String> usernamelist = new ArrayList<>();
    ArrayAdapter arrayAdapter;;

    ListView userListView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_list);
        userlistReference = FirebaseDatabase.getInstance().getReference().child("usernamelist");
        onStart();
        userListView = (ListView) findViewById(R.id.userlistview);


    }

    @Override
    protected void onStart() {
        super.onStart();
        final ValueEventListener userListener = new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                usernamelist = new ArrayList<>((ArrayList) dataSnapshot.getValue());
                usernamelist.remove(usernameOfCurrentUser());
                Log.i(TAG, "onDataChange: "+usernamelist.toString());
                arrayAdapter = new ArrayAdapter(UserList.this,android.R.layout.simple_list_item_1,usernamelist);
                userListView.setAdapter(arrayAdapter);
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.w(TAG, "onCancelled: ",databaseError.toException());
                Toast.makeText(UserList.this, "Failed to load User list.",
                        Toast.LENGTH_SHORT).show();
            }
        };
        userlistReference.addValueEventListener(userListener);

        mUserListListener = userListener;
    }
    public String usernameOfCurrentUser()
    {
        String email = MainActivity.mAuth.getCurrentUser().getEmail();
        if (email.contains("@")) {
            return email.split("@")[0];
        } else {
            return email;
        }
    }
    @Override
    public void onStop() {
        super.onStop();

        // Remove post value event listener
        if (mUserListListener != null) {
            userlistReference.removeEventListener(mUserListListener);
        }

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()) {
            case R.id.action_logout:
                FirebaseAuth.getInstance().signOut();
                startActivity(new Intent(this, MainActivity.class));
                finish();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}

Answer 3

在Firebase身份验证（以前称为Firebase SimpleLogin）中使用电子邮件/密码身份验证时，您的用户的电子邮件和密码组合将与实际存储在您的Firebase中的数据分开安全存储。

Firebase中的数据与用户的电子邮件/密码哈希组合之间的这种屏障是设计出来的：我们希望让您更轻松地（1）开发您的应用程序，（2）防止任何意外的用户凭据泄露，以及（3）仍然为您提供如何在Firebase中存储用户数据的完全灵活性。

这意味着我们只存储电子邮件地址/密码哈希组合，而不存储其他内容，因此您可以决定如何在Firebase中存储实际用户数据。正如您所建议的，您应该获取用户id并将该数据存储在您的Firebase中的一个位置，例如/users/$id，并使用Firebase安全规则语言来确定对该数据的读/写访问权限。用户的唯一id和电子邮件已经在编写规则时使用的auth变量中。