Firebase用户身份验证无法正常工作

Question

我对此仍然很新，所以对于

我试图学习如何使用firebase的电子邮件和密码来制作登录系统的任何小错误表示歉意，但似乎无法按预期工作。检查电子邮件是否为空的代码，不正确的格式，密码长度不匹配参数也无法正常工作。我在运行前仔细检查代码，但没有得到任何结果。

我已经将此应用程序连接到firebase，并添加firebase身份验证sdk

单击“ login noreferrer' /a>

loginpage.kt

class loginPage : AppCompatActivity() {

lateinit var binding : LoginPageBinding
lateinit var auth: FirebaseAuth
override fun onCreate(savedInstanceState: Bundle?) {
    binding = LoginPageBinding.inflate(layoutInflater)
    super.onCreate(savedInstanceState)
    window.setFlags(
        WindowManager.LayoutParams.FLAG_FULLSCREEN,
        WindowManager.LayoutParams.FLAG_FULLSCREEN);
    window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
    setContentView(R.layout.login_page)

    auth = FirebaseAuth.getInstance()

    login_back_button.setOnClickListener{
        val intent = Intent(this, MainActivity::class.java)
        startActivity(intent)
    }
    binding.loginButton.setOnClickListener{
        val email = binding.emailField.text.toString()
        val password = binding.passwordField.text.toString()

        if (email.isEmpty()){
            binding.emailField.error = "Email cannot be empty"
            binding.emailField.requestFocus()
            return@setOnClickListener
        }

        if (!Patterns.EMAIL_ADDRESS.matcher(email).matches()){
            binding.emailField.error = "Email not valid"
            binding.emailField.requestFocus()
            return@setOnClickListener
        }

        if (password.length > 6){
            binding.passwordField.error = "Minimal password length is 6"
            binding.passwordField.requestFocus()
            return@setOnClickListener
        }
        RegisterFirebase(email,password)
    }
}

private fun RegisterFirebase(email: String, password: String) {
    auth.createUserWithEmailAndPassword(email,password)
        .addOnCompleteListener(this){
            if (it.isSuccessful){
                Toast.makeText(this, "Register Successful", Toast.LENGTH_SHORT).show()
                val intent = Intent(this, homePage::class.java)
                startActivity(intent)
            } else {
                Toast.makeText(this, "${it.exception?.message}", Toast.LENGTH_SHORT).show()
            }
        }
}

}

homepage.kt

class homePage : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    window.setFlags(
        WindowManager.LayoutParams.FLAG_FULLSCREEN,
        WindowManager.LayoutParams.FLAG_FULLSCREEN);
    window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
    setContentView(R.layout.home_page)
}

}

dectext用于输入电子邮件（在login_page.xml中）

<EditText
    android:id="@+id/email_field"
    android:layout_width="272dp"
    android:layout_height="31dp"
    android:background="@drawable/email_password_filler"
    android:hint="@string/enter_your_email"
    android:paddingStart="20sp"
    android:paddingTop="5sp"
    android:paddingBottom="5sp"
    android:textSize="13sp"
    android:maxLines="1"
    android:lines="1"
    android:singleLine="true"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.504"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.126"
    tools:ignore="Autofill,RtlSymmetry,TextFields" />

输入密码（在login_page.xml）

<EditText
    android:id="@+id/password_field"
    android:layout_width="272dp"
    android:layout_height="31dp"
    android:background="@drawable/email_password_filler"
    android:hint="@string/enter_your_password"
    android:paddingStart="20sp"
    android:paddingTop="5sp"
    android:paddingBottom="5sp"
    android:textSize="13sp"
    android:maxLines="1"
    android:lines="1"
    android:singleLine="true"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.504"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.208"
    tools:ignore="Autofill,RtlSymmetry,TextFields" />

Answer 1

密码应始终大于或等于6，在您的情况下，情况相反。这样修复它：

if (password.length < 6) {
    binding.passwordField.error = "Minimal password length is 6"
    binding.passwordField.requestFocus()
    return@setOnClickListener
}

login_back_button缺少binding引用以及如果是返回按钮，则应只使用完成才能返回以前活动而不是再次创建新实例。像这样：

binding.loginBackButton.setOnClickListener { finish() }

更新：

问题是您使用binding，而不是在setContentView中传递它。这样修复它：

setContentView(binding.root)