Question

以下引用已创建。每当我运行代码时，加载到此页面后都会崩溃。当我注释部分代码时，它可以正常工作。我正在尝试从Firebase获取数据，即当前用户的电子邮件ID。这是firebase here

的快照

 FirebaseDatabase database=FirebaseDatabase.getInstance();
//FirebaseUser named=FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference ref=database.getReference("Users");



@Override
protected void onStart() {
    super.onStart();

    ref.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            user value=dataSnapshot.getValue(user.class);
            Toast.makeText(mainPage.this, " "+ value.getEmail(), Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });
}

//这是错误中出现的内容

2018-10-28 01:21:08.146 9706-9706/com.example.user.trip E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.user.trip, PID: 9706
com.google.firebase.database.DatabaseException: Found two getters or fields with conflicting case sensitivity for property: user_name
    at com.google.android.gms.internal.firebase_database.zzku.zzae(Unknown Source:48)
    at com.google.android.gms.internal.firebase_database.zzku.<init>(Unknown Source:303)
    at com.google.android.gms.internal.firebase_database.zzkt.zza(Unknown Source:12)
    at com.google.android.gms.internal.firebase_database.zzkt.zzb(Unknown Source:130)
    at com.google.android.gms.internal.firebase_database.zzkt.zza(Unknown Source:0)
    at com.google.firebase.database.DataSnapshot.getValue(Unknown Source:10)
    at com.example.user.trip.mainPage$2.onDataChange(mainPage.java:86)
    at com.google.android.gms.internal.firebase_database.zzfc.zza(Unknown Source:13)
    at com.google.android.gms.internal.firebase_database.zzgx.zzdr(Unknown Source:2)
    at com.google.android.gms.internal.firebase_database.zzhd.run(Unknown Source:71)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6649)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:826)
2018-10-28 01:21:08.223 1890-2002/system_process E/InputDispatcher: channel '9bc8488 com.example.user.trip/com.example.user.trip.mainPage (server)' ~ Channel is unrecoverably broken and will be disposed!
2018-10-28 01:21:08.223 1890-2002/system_process E/InputDispatcher: channel '4b5a24d com.example.user.trip/com.example.user.trip.loginPage.LoginActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
2018-10-28 01:21:09.311 1890-2053/system_process E/TaskPersister: File error accessing recents directory (directory doesn't exist?).

Answer 1

将(1, [1, 2]) (1, [3, 4]) (1, [5, 6]) (1, [7, 8]) (2, [9, 10]) (2, [11, 12]) (2, [13, 14]) (2, [15, 16]) (3, [17, 18]) (3, [19, 20]) (3, [21, 22]) (3, [23, 24]) (1, [25, 26]) (1, [27, 28]) (1, [29, 30])类中的代码更改为user而不是user_name。

或者，如果您不在乎，请在该变量上方编写以下代码：

User_name

或者您可以更改数据库结构以将节点@PropertyName("User_name) private String user_name = ""设置为User_name。

基本上，它区分大小写。

我试图从firebase实时数据库中获取用户的电子邮件ID。但是每当我运行这段代码时。它不断崩溃

1 个答案: