[英]ProGuard makes Gson return LinkedTreeMap instead of my type
The following line of code works for me normally: 以下代码行通常适用于我:
val users: Array<Catalog> = com.google.gson.Gson().fromJson(data, Array<MyUserClass>::class.java)
But when I enable ProGuard, I get this error: 但是当我启用ProGuard时,我收到此错误:
java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap cannot be cast to com.example.app.Models.MyModel
java.lang.ClassCastException:com.google.gson.internal.LinkedTreeMap无法强制转换为com.example.app.Models.MyModel
MyUserClass
is as follows: MyUserClass
如下:
data class MyUserClass(var posts: List<UserPosts>)
So Gson properly makes users
be MyUserClass
- but instead of MyUserClass
being a list of UserPosts
, it ends up being a list of LinkedTreeMap
所以GSON妥善使得
users
可以MyUserClass
-但不是MyUserClass
是列表UserPosts
,它最终被名单LinkedTreeMap
I've been trying to solve this for a while now, and all the answers I found related to this have to do with generics, but I'm not using generics, I'm passing the class directly to Gson. 我一直试图解决这个问题一段时间了,我发现与此相关的所有答案都与泛型有关,但我没有使用泛型,我将这个类直接传递给Gson。
I'm completely lost at this point, so any guidance would be apprecciated 我现在完全迷失了,所以任何指导都会受到赞赏
Here's the related ProGuard rules: 以下是相关的ProGuard规则:
##---------------Begin: proguard configuration for Gson ----------
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature
# For using GSON @Expose annotation
-keepattributes *Annotation*
# Gson specific classes
-keep class sun.misc.Unsafe { *; }
#-keep class com.google.gson.stream.** { *; }
# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { *; }
-keep class com.example.Models.** { *; }
# Prevent proguard from stripping interface information from TypeAdapterFactory,
# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
-keep class * implements com.google.gson.TypeAdapterFactory
-keep class * implements com.google.gson.JsonSerializer
-keep class * implements com.google.gson.JsonDeserializer
##---------------End: proguard configuration for Gson ----------
-keep public class MyUserClass
-keep public class UserPosts
Make sure your proguard.cfg contains all of the rules: 确保您的proguard.cfg包含所有规则:
##---------------Begin: proguard configuration for Gson ----------
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature
# For using GSON @Expose annotation
-keepattributes *Annotation*
# Gson specific classes
-keep class sun.misc.Unsafe { *; }
#-keep class com.google.gson.stream.** { *; }
# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { *; }
# Prevent proguard from stripping interface information from TypeAdapterFactory,
# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
-keep class * implements com.google.gson.TypeAdapterFactory
-keep class * implements com.google.gson.JsonSerializer
-keep class * implements com.google.gson.JsonDeserializer
##---------------End: proguard configuration for Gson ----------
-keep public class MyUserClass
-keep public class UserPosts
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