GsonJsonProvider.java 文件源码

/**
 * Get the {@link Gson} instance to use.
 * @return The {@link Gson} instance to use, from {@link ContextResolver} if available or the default one
 */
private Gson getGson() {
    if (gson == null) {
        // init using a contextresolver, if available
        ContextResolver<Gson> contextResolver = providers.getContextResolver(Gson.class,
                MediaType.APPLICATION_JSON_TYPE);
        if (contextResolver != null) {
            gson = contextResolver.getContext(Gson.class);
        }
        if (gson == null) {
            // use default
            gson = GsonConfiguration.builder().create();
        }
    }
    return gson;
}