数据库URL不匹配
我正在尝试将用户的数据发送到我项目的注册性数据库中。为此，我创建了一个数据库参考并复制 url 这是我的实时数据库中写的以下代码：
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReferenceFromUrl("https://quiz-project-6afd9-default-rtdb.europe-west1.firebasedatabase.app/");
但是，在启动该应用程序时，我会遇到致命例外，说明以下内容：
2022-06-21 14：50：24.921 8323-8323/com.dinocodeacademy.maingoquizagain e/androidruntime：致命例外：主要例外： 过程：com.dinocodeacademy.maingoquizagain，pid：8323 java.lang.runtimeException：无法实例化活动componentInfo {com.dinocodeacademy.maingoquizagain/com.dinocodeacademy.com.signup}：com.google.fire.fire.firebase.database.database.databaseexeexection：databaseexpiption：invalid url（invalid url quiz url ur quiz url（
有人知道为什么会发生这种情况？
I'm trying to send user's data to Realtime Database in SignUpActivity in my project. For that I created a database reference and copied the url that is written in my Realtime Database with the following code:
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReferenceFromUrl("https://quiz-project-6afd9-default-rtdb.europe-west1.firebasedatabase.app/");
However, when launching the app I get Fatal exception stating the following:
2022-06-21 14:50:24.921 8323-8323/com.dinocodeacademy.maingoquizagain E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.dinocodeacademy.maingoquizagain, PID: 8323
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.dinocodeacademy.maingoquizagain/com.dinocodeacademy.com.SignUp}: com.google.firebase.database.DatabaseException: Invalid URL (https://quiz-project-6afd9-default-rtdb.europe-west1.firebasedatabase.app/) passed to getReference(). URL was expected to match configured Database URL: https://quiz-project-6afd9-default-rtdb.firebaseio.com
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3365)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: com.google.firebase.database.DatabaseException: Invalid URL (https://quiz-project-6afd9-default-rtdb.europe-west1.firebasedatabase.app/) passed to getReference(). URL was expected to match configured Database URL: https://quiz-project-6afd9-default-rtdb.firebaseio.com
at com.google.firebase.database.FirebaseDatabase.getReferenceFromUrl(FirebaseDatabase.java:214)
at com.dinocodeacademy.com.SignUp.(SignUp.java:34)
at java.lang.Class.newInstance(Native Method)
at android.app.AppComponentFactory.instantiateActivity(AppComponentFactory.java:95)
at androidx.core.app.CoreComponentFactory.instantiateActivity(CoreComponentFactory.java:45)
at android.app.Instrumentation.newActivity(Instrumentation.java:1253)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3353)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
2022-06-21 14:50:24.969 8323-8323/com.dinocodeacademy.maingoquizagain I/Process: Sending signal. PID: 8323 SIG: 9
Anybody knows why that happens?
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要解决这个问题，只需更改
：
您需要将URL发送到getInstance（）方法不是到getReferenceFromurl（）方法。除此之外，您应该只使用GetReference（）。
To solve this, simply change:
Into:
You need to send the URL to the getInstance() method not to the getReferenceFromUrl() method. Besides that, you should simply use getReference().
我认为这可能是因为您使用的是
getReferenceFromurl方法。您可以尝试将URL传递到getInstance：I think this may come because you're using the
getReferenceFromUrlmethod. Can you try instead passing the URL togetInstance: