我正在尝试将用户凭据保存到 Firebase 实时数据库。但是,当我执行该程序时,数据库没有更新。我已正确配置 Firebase 设置,因为身份验证和存储(均为 Firebase)正在运行。
build.gradle
:
dependencies {
...
// Firebase SDK setup
// Import the BoM for the Firebase platform
implementation platform('com.google.firebase:firebase-bom:28.0.1')
// Declare the dependency for the Firebase library
implementation 'com.google.firebase:firebase-storage-ktx'
implementation 'com.google.firebase:firebase-auth-ktx'
implementation 'com.google.firebase:firebase-database-ktx'
}
apply plugin: 'com.google.gms.google-services'
AndroidManifest.xml
:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package=<NAME>>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
...
</application>
</manifest>
注册类别(MWE):
class RegisterActivity : AppCompatActivity() {
var selectedPhotoUri: Uri? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Register UI
register_button_register.setOnClickListener {
performRegister()
}
}
// Register user credentials
private fun performRegister() {
val email = email_editText_register.text.toString()
val password = password_editText_register.text.toString()
// Firebase Authentication - WORKING
FirebaseAuth.getInstance().createUserWithEmailAndPassword(email, password)
.addOnCompleteListener {
uploadImageToFirebaseStorage()
}
}
// Upload selected photo to Firebase Storage - WORKING
private fun uploadImageToFirebaseStorage() {
if(selectedPhotoUri == null) return
val filename = UUID.randomUUID().toString()
val ref = FirebaseStorage.getInstance().getReference("/images/$filename")
ref.putFile(selectedPhotoUri!!)
ref.downloadUrl.addOnSuccessListener {
saveUserToFirebaseDatabase(it.toString())
}
}
// Save user associated credentials to Firebase Database - NOT WORKING
private fun saveUserToFirebaseDatabase(profileImageURL: String) {
val uid = FirebaseAuth.getInstance().uid ?: ""
val ref = Firebase.database.getReference("/users/$uid")
val user = User(uid, username_editText_register.text.toString(), profileImageURL)
ref.setValue(user)
}
}
// User credentials to be saved
class User(val uid: String, val username: String, val profileImageURL: String)
saveUserToFirebaseDatabase()
方法未执行?我在插入 onSuccessListener
和 onFailureListener
语句后检查了 logcat
,但是没有突出显示错误或调试信息。该应用程序。将图像推送到存储,但数据库未更新。它仍然是空的。工作流程如下:
- Authenticate user by email and password. - WORKING
- Save profile image in Storage. - WORKING
- Save profile identifier, username, and image in DB. - NOT WORKING
Firebase 数据库规则:
{
"rules": {
".read": "true",
".write": "true"
}
}
我尝试更改层次结构,但这也不起作用:
val uid = FirebaseAuth.getInstance().uid ?: ""
val ref = Firebase.database.getReference("/users/$uid")
val user = User(uid, username_edittext_register.text.toString(), profileImageUrl)
ref.child("users").child(uid).setValue(user)
我已阅读 Firebase 文档,一切似乎都已就位。我还禁用了防火墙,但这也不起作用。有人可以指出这里的问题吗?预先感谢您。
最佳答案
要获取对(默认)“us-central1”以外的 Firebase 实时数据库的引用(例如“europe-west1”),您必须将数据库 URL 传递给 getInstance()方法。
对于“us-central1”则无需这样做,您只需调用“getInstance()”方法即可,无需传递任何参数。
有关详细信息,请查看有关实时数据库位置的官方文档:
作为替代解决方案,您可以从 Firebase 控制台下载最新的 google-services.json
并将其添加到您的应用中。如果该位置的正确 URL 位于其中,那么当您调用 FirebaseDatabase.getInstance()
时,SDK 将从那里读取它,而不传递任何参数。
关于android - getInstance() 不适用于实时数据库中除 us-central1 之外的其他位置,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/67795058/