Question

在现有节点更新firebase数据库时遇到了一个奇怪的问题。它返回InvocationTargetException并进一步在stackoverflow错误之下（是网站从中获取其名称的位置）。我已经尝试了所有我能想到的东西并搜索了SO，仍然无法修复它。问题似乎不在构建文件中。我最近更改了我的应用程序包名称并将其添加到firebase控制台。我刚刚注意到日志调试部分仍在引用我的应用程序以前的包名com.example.shopper。这可能导致它。或者是下面指出的两行。

 else {
        InventoryItem updatedItem = items.get(position).getInventoryItem();
        updatedItem.setPrice(price);
        updatedItem.setQuantity(quantity);
        updatedItem.setUnitName(unitType);
        Map<String, Object> databaseUpdate = new HashMap<>();
        databaseUpdate.put(updatedItem.getName(), updatedItem);
        Log.d(TAG, "done: updatedItem: "+updatedItem.toString());
        inventoryDatabaseReference=inventoryDatabaseReference.child(updatedItem.getCategory());
        Log.d(TAG, "done: updateNotWorking:  "+inventoryDatabaseReference.toString());
        inventoryDatabaseReference.updateChildren(databaseUpdate).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.d(TAG, "onFailure: "+e.toString());
            }
        });
    }

跟踪指向我的失败监听器的行。我添加了监听器以查看出现了什么问题，但是一旦调用该行就发现我得到错误，因为上面的日志是最后的成功操作要获取值以更改项目，我使用对话框片段。该片段用于多个类似目的，例如该数据的初始放置并且用于该目的。它下面的跟踪指向第一行调用donelistener.done

   builder.setTitle(title).setPositiveButton("Done", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            if (setPrice || isUpdating)
                doneListener.done(quantity, unitSelected, position, priceSet);
            else {
                priceInBasket = priceSet * quantityToBuy;
                Log.d("n", "onClick: TotalPrice toBasket " + priceInBasket + "individiual price" + priceSet);
                doneListener.done(quantityToBuy, buyerItemUnitName, position, priceInBasket);
            }
        }
    })

很抱歉，如果这是一个简单的错误，浪费时间，但我昨晚花了整整一个时间，看不到解决方案。您可能需要的任何其他信息让我知道跟踪如下

06-07 14:13:21.434 14585-14585/com.example.testing.shopper     D/CurrentInventory: done: updatedItem: InventoryItem{quantity=6, price=0.5, unitName='/100g'}
06-07 14:13:21.435 14585-14585/com.example.testing.shopper D/CurrentInventory: done: updateNotWorking:  https://shopper-a34fb.firebaseio.com/ShopInventory/-KkgxqStvYBMm1fz0lOZ/Energy%20Drinks
06-07 14:13:21.764 14585-14585/com.example.testing.shopper I/dalvikvm: threadid=1: stack overflow on call to Ljava/lang/AbstractStringBuilder;.enlargeBuffer:VI
06-07 14:13:21.764 14585-14585/com.example.testing.shopper I/dalvikvm:   method requires 28+20+20=68 bytes, fp is 0x419a2334 (52 left)
06-07 14:13:21.764 14585-14585/com.example.testing.shopper I/dalvikvm:   expanding stack end (0x419a2300 to 0x419a2000)
06-07 14:13:21.764 14585-14585/com.example.testing.shopper I/dalvikvm: Shrank stack (to 0x419a2300, curFrame is 0x419a248c)
06-07 14:13:21.765 14585-14585/com.example.testing.shopper D/AndroidRuntime: Shutting down VM
06-07 14:13:21.765 14585-14585/com.example.testing.shopper D/dalvikvm: threadid=1: detach (group=0x41aa3ce0)
06-07 14:13:21.765 14585-14585/com.example.testing.shopper W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41aa3ce0)
06-07 14:13:21.765 14585-14585/com.example.testing.shopper W/dalvikvm: threadid=1: uncaught exception occurred
06-07 14:13:21.765 14585-14585/com.example.testing.shopper W/System.err: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
06-07 14:13:21.772 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source)

一堆这些

06-07 14:13:21.859 14585-14585/com.example.testing.shopper D/dalvikvm: GC_FOR_ALLOC freed 5052K (46469), 38% free 8607K/13700K, paused 34ms, total 35ms
06-07 14:13:21.860 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source)
06-07 14:13:21.860 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source)
06-07 14:13:21.860 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source)
06-07 14:13:21.860 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source)

然后显示我的代码所在的行

06-07 14:13:21.877 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source)
06-07 14:13:21.877 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source)
06-07 14:13:21.877 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source)
06-07 14:13:21.877 14585-14585/com.example.testing.shopper W/System.err:     at com.google.android.gms.internal.zzbqi.zzaF(Unknown Source)
06-07 14:13:21.877 14585-14585/com.example.testing.shopper W/System.err:     at com.google.firebase.database.DatabaseReference.zza(Unknown Source)
06-07 14:13:21.877 14585-14585/com.example.testing.shopper W/System.err:     at com.google.firebase.database.DatabaseReference.updateChildren(Unknown Source)
06-07 14:13:21.878 14585-14585/com.example.testing.shopper W/System.err:     at com.aihsoftware.shopper.CurrentInventoryFragment.done(CurrentInventoryFragment.java:288)
06-07 14:13:21.878 14585-14585/com.example.testing.shopper W/System.err:     at com.aihsoftware.shopper.DialogFragments.AddItemToInventoryDialogFragment$2.onClick(AddItemToInventoryDialogFragment.java:145)
06-07 14:13:21.878 14585-14585/com.example.testing.shopper W/System.err:     at android.support.v7.app.AlertController$ButtonHandler.handleMessage(AlertController.java:157)
06-07 14:13:21.878 14585-14585/com.example.testing.shopper W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:110)
06-07 14:13:21.878 14585-14585/com.example.testing.shopper W/System.err:     at android.os.Looper.loop(Looper.java:193)
06-07 14:13:21.878 14585-14585/com.example.testing.shopper W/System.err:     rr:     at java.lang.reflect.Method.invoke(Method.java:515)
06-07 14:13:21.894 14585-14585/com.example.testing.shopper W/System.err:    ... 557 more
06-07 14:13:21.895 14585-14585/com.example.testing.shopper W/System.err: Caused by: java.lang.StackOverflowError
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:163)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at java.lang.StringBuilder.append(StringBuilder.java:311)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at android.net.Uri.encode(Uri.java:1864)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at android.net.Uri$PathPart.getEncoded(Uri.java:2112)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at android.net.Uri$HierarchicalUri.appendSspTo(Uri.java:1216)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at android.net.Uri$HierarchicalUri.makeSchemeSpecificPart(Uri.java:1205)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at android.net.Uri$HierarchicalUri.getSsp(Uri.java:1188)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:     at android.net.Uri$HierarchicalUri.getSchemeSpecificPart(Uri.java:1197)
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/System.err:    ... 559 more
06-07 14:13:21.906 14585-14585/com.example.testing.shopper W/dalvikvm: threadid=1: calling UncaughtExceptionHandler

最后一堆红色

06-07 14:13:21.927 14585-14585/com.example.testing.shopper E/AndroidRuntime: FATAL EXCEPTION: main
                                                                         Process: com.example.testing.shopper, PID: 14585
                                                                         java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
                                                                             at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source)
                                                                             at com.google.android.gms.internal.zzbqi.zzax(Unknown Source)
                                                                             at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source)
                                                                             at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source)
                                                                             at com.google.android.gms.internal.zzbqi.zzax(Unknown Source)

先谢谢大家

编辑：完成了一些挖掘，调用目标是堆栈溢出错误的包装器。忘记指出这一点。这意味着URI＆stringbuilder存在问题。 firebase数据库.updateChildren（）无法使用URI＆＃39;

Answer 1

我找到了一个解决方法。我很高兴它的工作但不是我仍然不知道为什么发生stackoverflow错误。我将updateChildren（）更改为指向对象的每个单独数据成员而不是对象本身。这工作但首先出现了一个错误，当多次更新项目导致另一棵树时。比如我有类别：{ 项目：{ 价格：1 数量：1 } } 它会导致类别：{ 类别：{ 价：2（更新）数量：2（更新） } 项目：{ 价格：1 数量：1 } } 这会不断重复所需的更新，我相信这就是问题的来源。但是我无法理解代码中的错误是什么。我总是使用updateChildren（）作为最佳实践。所有我能想到的是这些线是导致多个子类别的问题。我将这两个类别作为变体放置

databaseUpdate.put(updatedItem.getName(), updatedItem);
    inventoryDatabaseReference=inventoryDatabaseReference.child(updatedItem.getCategory());

这是有效的

databaseUpdate.put(updatedItem.getCategory()+"/"+updatedItem.getName()+"/price",price);
        databaseUpdate.put(updatedItem.getCategory()+"/"+updatedItem.getName()+"/quantity",quantity);
        databaseUpdate.put(updatedItem.getCategory()+"/"+updatedItem.getName()+"/unitName",unitType);
inventoryDatabaseReference.updateChildren(databaseUpdate)

updatechildren（）firebase android上的stackoverflow错误

1 个答案: