Gemini 1.5 Pro model — JSON format responses

The new Gemini models 1.5 Pro and 1.5 Flash support JSON responses. Previous version don’t support JSON response.

While developing an Android application using Gemini. I was able to add a prompt to get the JSON response and use Kotlin to parse the response string.

Gemini model configuration

val config = generationConfig {
                        responseMimeType = "application/json"
                        temperature = 0.9f
                        topK = 16
                        topP = 0.1f
                        //maxOutputTokens = 200
                        //stopSequences = listOf("red")
                    }

                    val generativeModel = GenerativeModel(
                        modelName = "gemini-1.5-flash",
                        apiKey = BuildConfig.GEM_API_KEY,
                        generationConfig = config
                    )

Prompt view model. We need to add in the prompt we want a to use a JSON schema and give example on our expected response

       val prompt = "Tell me information about the city $inputTravelCity"
        "Using this JSON schema:" +
        "Information = {\"city\": str,\"country\": str}" +
        "  Return a `list[Information]`"

        viewModelScope.launch {
            try {…