👀 Views: 1 💬 Answers: 1 📅 Created: 2025-06-07

android retrofit okhttp caching kotlin

After trying multiple solutions online, I still can't figure this out... I'm currently implementing a custom caching mechanism for API calls using Retrofit and OkHttp in my Android application, targeting API level 30. I've set up OkHttp to cache responses with a defined cache size, but I'm running into an issue where I'm retrieving stale data from the cache instead of the fresh data after certain intervals. Here's how I've configured my OkHttp client: ```kotlin val cacheSize = 10 * 1024 * 1024 // 10 MiB val cache = Cache(context.cacheDir, cacheSize) val okHttpClient = OkHttpClient.Builder() .cache(cache) .addInterceptor { chain -> val response = chain.proceed(chain.request()) response.newBuilder() .header("Cache-Control", "max-age=60") // cache for 1 minute .build() } .build() ``` I've implemented this in my Retrofit instance as follows: ```kotlin val retrofit = Retrofit.Builder() .baseUrl("https://api.example.com/") .client(okHttpClient) .addConverterFactory(GsonConverterFactory.create()) .build() ``` When I make the API call, it works as expected the first time, but when I try to fetch data again after a minute, I still receive the old cached data instead of making a fresh request. I've also added logging to see if the request is hitting the server or just going to the cache: ```kotlin val response = chain.proceed(chain.request()) Log.d("API Request", "URL: ${chain.request().url}, Response Code: ${response.code}") ``` The log indicates that the response is coming from the cache, but I expected it to bypass the cache after the max-age expires. I've tried clearing the cache manually by using `cache.evictAll()` and reinitializing the Retrofit instance, but that doesn't seem to fix the issue either. What am I missing here? Is there a specific way to control cache expiration in Retrofit with OkHttp, or is there a known issue with cache behavior in certain scenarios? Has anyone else encountered this? I'm working with Kotlin in a Docker container on Debian.