Question

我正在尝试将信息插入Firebase数据库，我收到了上述错误。

完整的堆栈跟踪：

04-16 02:42:14.218 6214-6214/com.example.or.dancers E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.or.dancers, PID: 6214
com.google.firebase.database.DatabaseException: Can't convert object of type java.lang.Long to type com.example.or.dancers.Info
  at com.google.android.gms.internal.zzbqi.zze(Unknown Source)
  at com.google.android.gms.internal.zzbqi.zzb(Unknown Source)
  at com.google.android.gms.internal.zzbqi.zza(Unknown Source)
  at com.google.firebase.database.DataSnapshot.getValue(Unknown Source)
  at com.example.or.dancers.Settings$1.onDataChange(Settings.java:187)
  at com.google.android.gms.internal.zzbmz.zza(Unknown Source)
  at com.google.android.gms.internal.zzbnz.zzYj(Unknown Source)
  at com.google.android.gms.internal.zzboc$1.run(Unknown Source)
  at android.os.Handler.handleCallback(Handler.java:739)
  at android.os.Handler.dispatchMessage(Handler.java:95)
  at android.os.Looper.loop(Looper.java:158)
  at android.app.ActivityThread.main(ActivityThread.java:7229)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

我的对象模型：

package com.example.or.dancers;

public class Info {

public String key;
public String infoName;
public int data;

public Info() {
}

public Info(String key, String name, int data) {
    this.key = key;
    this.infoName = name;
    this.data = data;
}
}

retrieveData函数：

public void retrieveData() {



    database.addValueEventListener(new ValueEventListener() {

        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

            for (DataSnapshot data : dataSnapshot.getChildren()) {
                Info d = data.getValue(Info.class);

                if(d.key.equals(info.key)){
                    info =d;
                    return;
                }

            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }


    });

}//retrieveData function.

我坚持这一点，因此我无法继续前进。任何帮助将不胜感激。

获得价值：

 public Object getValue() {
    return this.zzbXv.zzUY().getValue();
}

public Object getValue(boolean var1) {
    return this.zzbXv.zzUY().getValue(var1);
}

public <T> T getValue(Class<T> var1) {
    Object var2 = this.zzbXv.zzUY().getValue();
    return zzbqi.zza(var2, var1);
}

public <T> T getValue(GenericTypeIndicator<T> var1) {
    Object var2 = this.zzbXv.zzUY().getValue();
    return zzbqi.zza(var2, var1);
}

Answer 1

我认为您应该调试以查找传递给Info对象的值。由于此错误与将Long转换为Info：

无法将java.lang.Long类型的对象转换为com.example.or.dancers.Info类型

1 个答案: