火力地堡数据库异常未能长转换为字符串

Question

我使用火力地堡实时数据库和我收到以下错误

FATAL EXCEPTION: main 
                    Process: com.example.tobias.run, PID: 17405 
                    com.google.firebase.database.DatabaseException: Failed to convert value of type java.lang.Long to String 
                     at com.google.android.gms.internal.zzbtg.zzaG(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg.zzb(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg.zza(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg.zzb(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg$zza.zze(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg$zza.zzaH(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg.zze(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg.zzb(Unknown Source) 
                     at com.google.android.gms.internal.zzbtg.zza(Unknown Source) 
                     at com.google.firebase.database.DataSnapshot.getValue(Unknown Source) 
                     at com.example.tobias.run.history.HistoryFragment$2.onChildAdded(HistoryFragment.java:123) 
                     at com.google.android.gms.internal.zzbox.zza(Unknown Source) 
                     at com.google.android.gms.internal.zzbqx.zzZV(Unknown Source) 
                     at com.google.android.gms.internal.zzbra$1.run(Unknown Source) 
                     at android.os.Handler.handleCallback(Handler.java:751) 
                     at android.os.Handler.dispatchMessage(Handler.java:95) 
                     at android.os.Looper.loop(Looper.java:241) 
                     at android.app.ActivityThread.main(ActivityThread.java:6274) 
                     at java.lang.reflect.Method.invoke(Native Method) 
                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

当试图马歇尔为I类从数据库中检索到的数据。这里出现的错误

databaseRef.addChildEventListener(new ChildEventListener() { 
     @Override 
     public void onChildAdded(DataSnapshot dataSnapshot, String s) { 
      dataSnapshot.getValue(TrackedRun.class); 
     } 

履带运行类

public class TrackedRun implements Parcelable { 

private float mDistance; 
private long mTime; 
private long mDate; 
private int mRating; 
private String mUnit; 
private Integer mID = null; 

public TrackedRun(int id, long date, float distance, long time, int rating, String unit){ 
    this.mDistance = distance; 
    this.mTime = time; 
    this.mDate = date; 
    this.mRating = rating; 
    this.mUnit = unit; 
    this.mID = id; 
} 


public TrackedRun(){ 
    // Default constructor required for firebase calls to DataSnapshot.getValue(User.class) 
} 

public TrackedRun(Parcel in) { 
    this.mID = in.readInt(); 
    this.mDate = in.readLong(); 
    this.mDistance = in.readFloat(); 
    this.mTime = in.readLong(); 
    this.mRating = in.readInt(); 
    this.mUnit = in.readString(); 
} 

@Override 
public int describeContents() { 
    return 0; 
} 

@Override 
public void writeToParcel(Parcel parcel, int i) { 
    parcel.writeInt(mID); 
    parcel.writeLong(mDate); 
    parcel.writeFloat(mDistance); 
    parcel.writeLong(mTime); 
    parcel.writeInt(mRating); 
    parcel.writeString(mUnit); 
} 

@Exclude 
public static final Parcelable.Creator<TrackedRun> CREATOR = new Parcelable.Creator<TrackedRun>(){ 

    @Override 
    public TrackedRun createFromParcel(Parcel parcel) { 
     return new TrackedRun(parcel); 
    } 

    @Override 
    public TrackedRun[] newArray(int i) { 
     return new TrackedRun[i]; 
    } 
}; 

public float getDistance(){ 
    return mDistance; 
} 
public long getTime(){ 
    return mTime; 
} 
public long getDate(){ return mDate; } 
public int getRating(){ 
    return mRating; 
} 
public String getUnit(){ 
    return mUnit; 
} 
public Integer getId(){ return mID; } 


public void setDistance(String distance){ 
    mDistance = DateManager.distanceToFloat(distance); 
} 
public void setTime(String time){ 
    mTime = DateManager.timeToUnix(time); 
} 
public void setDate(String date){ 
    mDate = DateManager.dateToUnix(date); 
} 
public void setRating(String rating){ 
    mRating = Integer.valueOf(rating); 
} 

public void setUnit(String unit){ 
    mUnit = unit; 
} 

Firebase database structure

我试图改变两个长字段我必须为int，但我得到了完全相同的错误。这是否与我正在实施Parcelable的事实有关？另外，当我运行dataSnapshot.getValue().toString()所有的字段都有正确的数据类型。

Answer 1

您的setter方法的参数类型与数据库中的值不一致。例如：

public void setRating(String rating) { 
    mRating = Integer.valueOf(rating); 
} 

这将导致火力地堡，以期待rating一个数据库中的字符串值。它找到一个Long值并报告它不能将Long转换为setRating()所需的字符串。 setDistance(),setTime()和setDate()存在同样的问题。

将参数类型或数据库值更改为一致。