不支持序列化数组，请改用列表

时间：2019-03-23 18:12:47

标签： android firebase firebase-realtime-database kotlin

我想将图像和文本上传到Firebase实时数据库。下面是我的代码

var newList : ArrayList<Bitmap> = arrayListOf()    
         .......

private fun insertSellerItemData(mAuth: FirebaseAuth?) {

        val progressDialog = ProgressDialog(this@SellItemActivity)
        progressDialog.setTitle("Image is Uploading...");

        progressDialog.show()

        val userId = FirebaseAuth.getInstance().currentUser?.uid

        val item = Item(tv_title.text.toString(), newList)

        databaseReference = FirebaseDatabase.getInstance().getReference("Items").child(userId)
        databaseReference?.setValue(item)?.addOnCompleteListener { task ->
            if (task.isSuccessful) {
                Toast.makeText(application, "Data successfully added", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this@SellItemActivity, "You cannot register with this mobile number", Toast.LENGTH_SHORT).show()
            }
        }
}

项目 

class Item(val title: String,val newList: ArrayList<Bitmap>) :Serializable{}

错误 

 Process: com.example.lyner.authentication, PID: 24574
    com.google.firebase.database.DatabaseException: Serializing Arrays is not supported, please use Lists instead

修改

我在存储到Firebase之前将位图转换为Uri 

val lt : ArrayList<Uri> = arrayListOf()
        for(i in newList)
        {
           val list = convertBitmaptoUri(i)
            lt.add(list)
        }
val item = Item(tv_title.text.toString(), tv_desc.text.toString(), tv_price.text.toString(),
                tv_category.text.toString(), dueDate, lt)

        databaseReference = FirebaseDatabase.getInstance().getReference("Items").child(userId)
        databaseReference?.setValue(item)?.addOnCompleteListener { task ->
            if (task.isSuccessful) {
                Toast.makeText(application, "Data successfully added", Toast.LENGTH_SHORT).show()
                progressDialog.dismiss()
            } else {
                Toast.makeText(this@SellItemActivity, "You cannot register with this mobile number", Toast.LENGTH_SHORT).show()
                progressDialog.dismiss()
            }
        }

错误 

 java.lang.StackOverflowError: stack size 8MB
        at java.lang.reflect.Method.invoke(Native Method)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:123)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
        at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)
2019-03-24 12:24:59.268 27163-27163/com.example.lyner.authentication E/AndroidRuntime:     at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:253)
        at com.google.android.gms.internal.firebase_database.zzkt.zzl(Unknown Source:0)
        at com.google.android.gms.internal.firebase_database.zzku.zzm(Unknown Source:185)

2 个答案:

答案 0 :(得分：0)

如果不先将其转换为字符串，就不能在实时数据库中存储位图对象。实时数据库并不容易存储二进制数据。可以考虑将原始二进制数据存储在Cloud Storage中，并将对该文件的引用存储在数据库中。

答案 1 :(得分：0)

当我尝试将Bitmap转换为Uri

时发生了此错误 
 java.lang.StackOverflowError: stack size 8MB

为解决此问题，我将其转换为String而不是Uri 

val lt: ArrayList<String> = arrayListOf()
   for (i in newList) {
       val list = bitmapToString(i)
       lt.add(list)
   }

fun bitmapToString(bitmap: Bitmap): String {
    val baos = ByteArrayOutputStream()
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos)
    val b = baos.toByteArray()
    val temp = Base64.encodeToString(b, Base64.DEFAULT);
    return temp;
}

对于此错误

Item does not define a no-argument constructor. If you are using ProGuard, make sure these constructors are not stripped

我为此修改了Item类

data class Item(
        val title: String = "",
        val newList: ArrayList<String>? = arrayListOf()) : Serializable
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