GSON | Serialize circular javascript object graphs | Serialization library

I'm doing a Group Chat with Firebase and currently I'm using a RecyclerView to display chat messages and I'm having a problem. When you open the app in the fragmented home and you go to chat activity and start chatting (adding elements to recycler view) all goes fine. But, when you go via the NavigationDrawer to another fragment and get back to the chat fragment using again this Navigation Drawer. When you add one element in the chat it appears all in the blank it just displays the last message. Anybody knows why does this happens?

Here I leave the RecyclerView Adapter Code:

I'm developing a simple navigator with mapbox API for Android. I'm creating some routes using https://docs.mapbox.com/playground/directions/ playground and i would like to use the generated JSON to generate a DirectionsRoute object. So i call DirectionsRoute.fromJson() but when i do it, the application crashes with this error:

I have sample tests used from scalatest.org site and maven configuration again as mentioned in reference documents on scalatest.org, but whenever I run mvn clean install it throws the compile time error for scala test(s).

Sharing the pom.xml below

In https://ktor.io/docs/json.html#gson, I can see we can have GsonSerialzer as the code

i have problem and really don't know how to fix this. I try to find similar posts several days, but didn't find.

I use retrofit for parsing api and put it in room database and use rxjava3 because it will be asynchronously

That my JSON

I have a JsonObject that contains a JsonArray of arrays. I would like to parse it using Gson. The following is what the data looks like. I can use JsonArray data = resourceObj.get("data").getAsJsonArray() to get the outer array, but I m not sure how to access the inner array. My understanding is that to get something as a JsonArray it has to be in the form "xyz": [ something] or "xyz"=[something]

I have an Eclipse application which on execution giving below error -

I have a JSON response that includes unknown keys (the numbers), which I'm finding difficult to parse using the Gson converter. The cut-down version is

I am learning retrofit 2 and got an error like this :

W/System.err: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 94 path $.riceField at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:226) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:131) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:222) at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:40) at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:27)

and here is the code

api