Kuidas muuta kõiki Retrofit teeki päringuid?

Interceptor. Added to the OkHttpClient used by Retrofit. The interceptor can modify the request before sending and the response before processing.

interface Interceptor {
    fun intercept(chain: Interceptor.Chain): Response
}

Create your own implementation of Interceptor and add it to OkHttpClient.Builder:

class MyChangingInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val originalRequest = chain.request()
        val newRequest = originalRequest.newBuilder()
            // Example: add a header
            .addHeader("X-Custom-Header", "SomeValue")
            // Example: change URL
            // .url("https://new.api.com" + originalRequest.url.encodedPath)
            // Example: change method (if needed)
            // .method("POST", originalRequest.body)
            .build()
        return chain.proceed(newRequest)
    }
}

Add the interceptor to OkHttpClient:

val client = OkHttpClient.Builder()
    .addInterceptor(MyChangingInterceptor())
    // You can add multiple interceptors
    // .addInterceptor(AnotherInterceptor())
    .build()

Use the created OkHttpClient when creating the Retrofit instance:

val retrofit = Retrofit.Builder()
    .baseUrl("https://your.api.com/")
    .client(client)
    .addConverterFactory(GsonConverterFactory.create())
    .build()