android - 不支持通用通配符类型

Question

我收到以下错误:

Could not deserialize object. Generic wildcard types are not supported (found in field m1(Map<String,Any>).someStringInM1(String))

此错误由以下行生成(我使用的是 Firestore 的 Android SDK):

task.result.toObjects(SomeClass::class.java)

我在其中尝试将结果映射到具有以下构造函数的自定义类的列表:

constructor(s1: String, s2: String, d1: Double, m1: Map<String, Any>, dr1: DocumentReference, i1: Int, d2: Double) {
        this.s1 = s1
        this.s2 = s2
        this.d1 = d1
        this.m1 = m1
        this.dr1 = dr1
        this.i1 = i1
        this.d2 = d2
    }

Answer 1

在release notes对于 Firebase SDK，它提到了版本 11.6.0:

Feature: Added support for deserializing field types with wildcard generic parameters (e.g. kotlin.Map).

听起来您应该将客户端库升级到 11.6.0。