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Samebug tips

  1. ,
    Expert tip

    Try indicating constructor to use @JsonCreator annotation.

  2. ,

    You are trying to deserialize a type for which Jackson does not provide a default mapper. You should create your custom mapper for this type.

com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
        at [Source:; line: 1, column: 1]	at com.fasterxml.jackson.databind.DeserializationContext.mappingException(	at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(	at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(	at com.fasterxml.jackson.databind.ObjectMapper.readValue(	at com.firebase.client.DataSnapshot.getValue(	at com.example.ispotrachel.myapplication.MainActivity$1.onDataChange(	at com.firebase.client.core.ValueEventRegistration$	at android.os.Handler.dispatchMessage(	at android.os.Looper.loop(	at	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(	at$