How to Decode a JSON Array into a Collection of Objects Using GSON?

Decoding Nested Data Structures with GSON

The provided JSON data represents an array of objects, while the decoding code is anticipating a single object of the ChannelSearchEnum class. This mismatch results in the "Expected BEGIN_OBJECT but was BEGIN_ARRAY" exception.

To address this, the decoding approach needs to be modified to handle an array of objects. One suitable method is to utilize the TypeToken class in combination with the fromJson method.

Type collectionType = new TypeToken<Collection<ChannelSearchEnum>>(){}.getType();
Collection<ChannelSearchEnum> enums = gson.fromJson(json, collectionType);

This code creates a type token for a collection of ChannelSearchEnum objects and then uses it to specify the desired type during deserialization. As a result, GSON will correctly parse the JSON array and populate a Collection containing individual ChannelSearchEnum instances.

The above is the detailed content of How to Decode a JSON Array into a Collection of Objects Using GSON?. For more information, please follow other related articles on the PHP Chinese website!