【发布时间】：2021-09-14 16:00:25
【问题描述】：
我尝试练习使用 Firebase 身份验证、实时数据库和存储的教程，在这个练习中我已经走了很长一段路，直到这个问题，我成功地将电子邮件和密码存储在身份验证中，它显示在 firebase 控制台上，但是问题出在数据库上，它应该在上面存储以下 HashMap，但在 firebase Realtime 控制台上没有显示任何内容
规则
{
"rules": {
".read": true,
".write": true
}
}
登录类
class LoginFragment : Fragment(R.layout.fragment_login) {
private var _binding: FragmentLoginBinding? = null
private var firebaseUser: FirebaseUser? = null
private lateinit var mAuth: FirebaseAuth
// This property is only valid between onCreateView and
// onDestroyView.
private val binding get() = _binding!!
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
_binding = FragmentLoginBinding.inflate(inflater, container, false)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
mAuth = FirebaseAuth.getInstance()
firebaseUser = FirebaseAuth.getInstance().currentUser
if(firebaseUser != null){
val action = LoginFragmentDirections.actionLoginFragmentToMainFragment()
findNavController().navigate(action)
}
binding.apply {
btnlogin.setOnClickListener {
loginUser()
}
textViewSignUp.setOnClickListener {
val action = LoginFragmentDirections.actionLoginFragment2ToRegisterFragment2()
findNavController().navigate(action)
}
}
}
private fun loginUser() {
val email: String = binding.inputEmail.text.toString()
val password: String = binding.inputPassword.text.toString()
if (TextUtils.isEmpty(email) || TextUtils.isEmpty(password)
) {
binding.apply {
inputEmail.error = "Email cannot be empty"
inputPassword.error = "Password cannot be empty"
}
}else {
mAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener{ task->
if(task.isSuccessful){
val action = LoginFragmentDirections.actionLoginFragmentToMainFragment()
findNavController().navigate(action)
}else {
Toast.makeText(requireContext(), "Error ${task.exception?.message.toString()}", Toast.LENGTH_SHORT).show()
}
}
}
}
}
注册类
class RegisterFragment : Fragment(R.layout.fragment_register) {
private var _binding: FragmentRegisterBinding? = null
private lateinit var mAuth: FirebaseAuth
private lateinit var refUsers: DatabaseReference
// This property is only valid between onCreateView and
// onDestroyView.
private val binding get() = _binding!!
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
_binding = FragmentRegisterBinding.inflate(inflater, container, false)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
mAuth = FirebaseAuth.getInstance()
binding.apply {
btnRegister.setOnClickListener {
registerUser()
}
alreadyHaveAccount.setOnClickListener {
findNavController().navigate(RegisterFragmentDirections.actionRegisterFragment2ToLoginFragment2())
}
}
}
private fun registerUser() {
val userName: String = binding.inputUsername.text.toString()
val email: String = binding.inputEmail.text.toString()
val password: String = binding.inputPassword.text.toString()
val confirmedPassword: String = binding.inputConformPassword.text.toString()
if (TextUtils.isEmpty(userName) || TextUtils.isEmpty(email)
|| TextUtils.isEmpty(password) || TextUtils.isEmpty(confirmedPassword)
) {
binding.apply {
inputUsername.error = "Username cannot be empty"
inputEmail.error = "Email cannot be empty"
inputPassword.error = "Password cannot be empty"
inputConformPassword.error = "Confirmed password cannot be empty"
}
} else if (!password.equals(confirmedPassword, ignoreCase = false)) {
Snackbar.make(
requireView(),
"The Password and confirmation do not match", Snackbar.LENGTH_LONG
).show()
} else {
mAuth.createUserWithEmailAndPassword(email, password)
.addOnCompleteListener { task ->
if (task.isSuccessful) {
val action =
RegisterFragmentDirections.actionRegisterFragmentToMainFragment()
val firebaseUserID = mAuth.currentUser!!.uid
refUsers = FirebaseDatabase.getInstance().reference
.child(firebaseUserID)
val userHashMap = HashMap<String, Any>()
userHashMap["uid"] = firebaseUserID
userHashMap["username"] = userName
userHashMap["profile"] =
"https://firebasestorage.googleapis.com/v0/b/mig33-94625.appspot.com/o/icons8-test-account-100.png?alt=media&token=ce231b05-d4a7-49cb-8003-027e0d5c76e1"
userHashMap["cover"] =
"https://firebasestorage.googleapis.com/v0/b/mig33-94625.appspot.com/o/cover.jpg?alt=media&token=6bbcf0fb-77d1-4870-b714-aa13eedff86c"
userHashMap["status"] = "offline"
userHashMap["search"] = userName.lowercase()
userHashMap["facebook"] = "https://m.facebook.com"
userHashMap["instagram"] = "https://m.instagram.com"
userHashMap["website"] = "https://www.google.com"
refUsers.updateChildren(userHashMap).addOnCompleteListener { task ->
if (task.isSuccessful) {
Log.d("mido",refUsers.get().result.toString())
findNavController().navigate(action)
}
}
//
} else {
Toast.makeText(
requireContext(),
"Error ${task.exception?.message.toString()}",
Toast.LENGTH_SHORT
).show()
}
}
}
}
}
build.gradle 依赖项
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib:1.5.20"
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.appcompat:appcompat:1.3.0'
implementation 'com.google.android.material:material:1.3.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
implementation platform('com.google.firebase:firebase-bom:28.2.0')
implementation 'com.google.firebase:firebase-analytics-ktx'
implementation 'com.google.firebase:firebase-core:19.0.0'
implementation 'com.google.firebase:firebase-auth:21.0.1'
implementation 'com.google.firebase:firebase-storage-ktx:20.0.0'
implementation 'com.google.firebase:firebase-messaging:22.0.0'
implementation platform('com.google.firebase:firebase-bom:28.2.0')
// Declare the dependency for the Realtime Database library
// When using the BoM, you don't specify versions in Firebase library dependencies
implementation 'com.google.firebase:firebase-database-ktx'
implementation 'de.hdodenhof:circleimageview:2.2.0'
implementation 'com.squareup.picasso:picasso:2.71828'
implementation 'androidx.cardview:cardview:1.0.0'
implementation 'com.rengwuxian.materialedittext:library:2.1.4'
implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
implementation 'com.intuit.ssp:ssp-android:1.0.6'
implementation 'com.intuit.sdp:sdp-android:1.0.6'
implementation 'com.android.support:multidex:1.0.3'
}
【问题讨论】：
-
这里的代码太多了。减少问题集，答案可能很明显：首先尝试直接写入数据库，仅此而已；没有变量，没有身份验证事件，只需先写。如果成功，请尝试将其重新添加到 createUser*() 调用中。然后尝试重新添加变量。首先隔离问题。
标签： android firebase kotlin firebase-realtime-database firebase-authentication