Question

我想将当前登录用户Uid保存/显示到Firebase数据库中。这是我的代码：

private EditText mEmail, mPassword;
private Button mLogin, mRegistration;

private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener firebaseAuthListener;

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

    mAuth = FirebaseAuth.getInstance();

    firebaseAuthListener = new FirebaseAuth.AuthStateListener() {
        @Override
        public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
            FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();

            if (user!=null) {
                Intent intent = new Intent(DriverLoginActivity.this,DriverMapActivity.class);
                startActivity(intent);
                finish();
                return;
            }
        }
    };

    mEmail = (EditText) findViewById(R.id.email);
    mPassword = (EditText) findViewById(R.id.password);

    mLogin = (Button) findViewById(R.id.login);
    mRegistration = (Button) findViewById(R.id.registration);


    mRegistration.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String email = mEmail.getText().toString();
            String password = mPassword.getText().toString();

           mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(DriverLoginActivity.this, new OnCompleteListener<AuthResult>() {
               @Override
               public void onComplete(@NonNull Task<AuthResult> task) {
                   if (!task.isSuccessful()) {
                       Toast.makeText(DriverLoginActivity.this,"sign up error", Toast.LENGTH_SHORT).show();

                   } else {

                       String user_id = mAuth.getCurrentUser().getUid();
                       DatabaseReference current_user_db = FirebaseDatabase.getInstance().getReference().child("Users").child("Drivers").child(user_id);
                       current_user_db.setValue(true);

                   }

               }
           });

        }
    });


    mLogin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final String email = mEmail.getText().toString();
            final String password = mPassword.getText().toString();
            mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(DriverLoginActivity.this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (!task.isSuccessful()) {
                        Toast.makeText(DriverLoginActivity.this,"sign in error", Toast.LENGTH_SHORT).show();

                    }
                }
            });

        }
    });

}

@Override
protected void onStart() {
    super.onStart();
    mAuth.addAuthStateListener(firebaseAuthListener);
}

@Override
protected void onStop() {
    super.onStop();
    mAuth.removeAuthStateListener(firebaseAuthListener);

}

用户注册和用户登录模块可以正常运行，但是用户Uid无法保存/显示在Firebase数据库中。

基本上，我想创建像uber这样的应用，并按照youtube turorial和以下链接进行操作：

https://www.youtube.com/watch?v=5uDNNJyKehM&list=PLxabZQCAe5fgXx8cn2iKOtt0VFJrf5bOd&index=4

在此视频中，一切正常，但我的Uid未显示在数据库中。

This is my currently Login users screenshot

And Here is firebase database after login user

Answer 1

firebase中的默认数据库规则如下。这些规则不允许任何人对您的数据库进行读写访问

 {
      "rules": {
        ".read": false,
        ".write": false
      }
    }

您必须按照以下说明更改数据库规则，以允许经过身份验证的用户读写。

 {
  "rules": {
    ".read": "auth!=null",
    ".write": "auth!=null"
  }
}

请转到您的Firebase控制台并签出“数据库”的“数据库规则”标签

如何在Android的Firebase数据库中存储用户Uid？

1 个答案: