Step 1: Retrofit Setup Ensure you have Retrofit added to your build.gradle file:

groovy Copy code implementation 'com.squareup.retrofit2:retrofit:2.9.0' implementation 'com.squareup.retrofit2:converter-gson:2.9.0' Step 2: Retrofit Interface Create a Retrofit interface GeminiApiService.kt:

kotlin Copy code import retrofit2.Call import retrofit2.http.Body import retrofit2.http.Header import retrofit2.http.POST

interface GeminiApiService {

@POST("analyze_prompt")
fun analyzePrompt(
    @Header("Authorization") token: String,
    @Body request: PromptRequest
): Call<AnalysisResponse>

} Step 3: Data Classes Define data classes for request and response bodies (PromptRequest.kt and AnalysisResponse.kt):

kotlin Copy code data class PromptRequest( val prompt: String )

data class AnalysisResponse( val computationalPower: String // Adjust this based on actual API response structure ) Step 4: Retrofit Initialization Initialize Retrofit in your application context, typically in your Application class or an ApiClient singleton:

kotlin Copy code import retrofit2.Retrofit import retrofit2.converter.gson.GsonConverterFactory

object ApiClient { private const val BASE_URL = "https://api.gemini.com/"

val geminiApiService: GeminiApiService by lazy {
    val retrofit = Retrofit.Builder()
        .baseUrl(BASE_URL)
        .addConverterFactory(GsonConverterFactory.create())
        .build()

    retrofit.create(GeminiApiService::class.java)
}

} Step 5: MainActivity (Example Usage) In your MainActivity.kt or relevant activity/fragment:

kotlin Copy code import android.os.Bundle import androidx.appcompat.app.AppCompatActivity import kotlinx.android.synthetic.main.activity_main.* import retrofit2.Call import retrofit2.Callback import retrofit2.Response

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    btnSubmit.setOnClickListener {
        val userPrompt = etUserPrompt.text.toString().trim()

        if (userPrompt.isNotEmpty()) {
            analyzePrompt(userPrompt)
        } else {
            // Handle empty prompt case
        }
    }
}

private fun analyzePrompt(prompt: String) {
    val token = "Your Gemini API token" // Replace with your actual Gemini API token
    val geminiApi = ApiClient.geminiApiService

    val request = PromptRequest(prompt)

    geminiApi.analyzePrompt("Bearer $token", request).enqueue(object : Callback<AnalysisResponse> {
        override fun onResponse(call: Call<AnalysisResponse>, response: Response<AnalysisResponse>) {
            if (response.isSuccessful) {
                val analysis = response.body()
                val computationalPower = analysis?.computationalPower ?: "Unknown"
                updateUI(computationalPower)
            } else {
                // Handle API error
                // For example, response.errorBody()?.string() can provide error details
            }
        }

        override fun onFailure(call: Call<AnalysisResponse>, t: Throwable) {
            // Handle network failure
        }
    })
}

private fun updateUI(computationalPower: String) {
    // Update your UI with the computational power approximation
    tvComputationalPower.text = "Estimated Computational Power: $computationalPower"
}

} Notes: Replace "Your Gemini API token" with your actual Gemini API token. UI Handling: Ensure you have appropriate UI elements (EditText, Button, TextView, etc.) in your layout XML (activity_main.xml in this example) and handle user input accordingly. Error Handling: Implement robust error handling for API responses (onFailure) and HTTP errors (onResponse with !response.isSuccessful). Security: Always handle API tokens securely and ensure sensitive information is protected. Testing: Test thoroughly to ensure that prompts are correctly sent to Gemini and responses are processed correctly. This example provides a basic framework for integrating Gemini's API into your Kotlin-based Android app. Adjustments may be necessary based on the specific structure of Gemini's API responses and additional requirements of your application.