java - 用户名和密码不会保存在 Firebase 数据库中

Question

下面是我在 android studio 中的注册页面和登录页面的代码。然而，在注册用户详细信息时，代码似乎没有上传到我的 firebase 数据库中。因此，在我的登录页面上无法使用此数据。不确定如何在我的代码中纠正这个问题。任何帮助，将不胜感激。

package com.example.spaceattack;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;

public class RegisterActivity extends AppCompatActivity {
    EditText emailId, password;
    Button btnSignUp;
    TextView tvSignIn;
    FirebaseAuth mFirebaseAuth;


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

        mFirebaseAuth = FirebaseAuth.getInstance();
        emailId = findViewById(R.id.editText);
        password = findViewById(R.id.editText2);
        btnSignUp = findViewById(R.id.button2);
        tvSignIn = findViewById(R.id.textView);
        btnSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = emailId.getText().toString();
                String pwd = password.getText().toString();
                if(email.isEmpty()) {
                    emailId.setError("Please enter email id");
                    emailId.requestFocus();
                }
                else if(pwd.isEmpty()) {
                    password.setError("Enter your password");
                    password.requestFocus();
                }
                else if(email.isEmpty() && pwd.isEmpty()) {
                    Toast.makeText(RegisterActivity.this,"Fields are Empty",Toast.LENGTH_SHORT).show();
                }
                else if(! (email.isEmpty() && pwd.isEmpty())) {

                    mFirebaseAuth.createUserWithEmailAndPassword(email, pwd) .addOnCompleteListener(RegisterActivity.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if(!task.isSuccessful()) {
                                Toast.makeText(RegisterActivity.this,"SignUp Unsuccessful, Try again",Toast.LENGTH_SHORT).show();

                            }

                            else {
                                startActivity(new Intent(RegisterActivity.this, WaterActivity.class));
                            }
                        }
                    });

                }
                else {

                    Toast.makeText(RegisterActivity.this,"Error!",Toast.LENGTH_SHORT).show();

                }

            }
        });

        tvSignIn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i = new Intent (RegisterActivity.this, LoginActivity.class);
                startActivity(i);
            }
        });
    }
}







package com.example.spaceattack;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class LoginActivity extends AppCompatActivity {
    EditText emailId, password;
    Button btnSignUp;
    TextView tvSignUp;
    FirebaseAuth mFirebaseAuth;
    private FirebaseAuth.AuthStateListener mAuthStateListener;

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

        mFirebaseAuth = FirebaseAuth.getInstance();
        emailId = findViewById(R.id.editText);
        password = findViewById(R.id.editText2);
        btnSignUp = findViewById(R.id.button2);
        tvSignUp = findViewById(R.id.textView2);

        mAuthStateListener = new FirebaseAuth.AuthStateListener() {


            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser mFirebaseUser = mFirebaseAuth.getCurrentUser();
                if (mFirebaseUser != null) {
                    Toast.makeText(LoginActivity.this, "Logged in", Toast.LENGTH_SHORT).show();
                    Intent i = new Intent(LoginActivity.this, MainActivity.class);
                    startActivity(i);
                } else {
                    Toast.makeText(LoginActivity.this, "Please Login", Toast.LENGTH_SHORT).show();

                }
            }
        };

        btnSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = emailId.getText().toString();
                String pwd = password.getText().toString();
                if (email.isEmpty()) {
                    emailId.setError("Please enter email id");
                    emailId.requestFocus();
                } else if (pwd.isEmpty()) {
                    password.setError("Enter your password");
                    password.requestFocus();
                } else if (email.isEmpty() && pwd.isEmpty()) {
                    Toast.makeText(LoginActivity.this, "Fields are Empty", Toast.LENGTH_SHORT).show();
                } else if (!(email.isEmpty() && pwd.isEmpty())) {

                    mFirebaseAuth.signInWithEmailAndPassword(email, pwd).addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (!task.isSuccessful()) {
                                Toast.makeText(LoginActivity.this, "Login Error, Please Login Again", Toast.LENGTH_SHORT).show();
                            } else {
                                Intent intToHome = new Intent(LoginActivity.this, WaterActivity.class);
                                startActivity(intToHome);
                            }

                        }

                    });
                } else {

                    Toast.makeText(LoginActivity.this, "Error!", Toast.LENGTH_SHORT).show();

                }

            }
        });

        tvSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intSignUp = new Intent(LoginActivity.this, WaterActivity.class);
                startActivity(intSignUp);
            }

        });
    }

    @Override
    protected void onStart() {
        super.onStart();
        mFirebaseAuth.addAuthStateListener(mAuthStateListener);
    }
}

Answer 1

据我所知，您问题中的代码均不会写入 Firebase 实时数据库。请记住，Firebase 身份验证仅将用户配置文件写入其自己的内部存储。如果您还希望将该信息存储在数据库中，则必须自己通过应用程序代码执行此操作。