Trying to make use of httpCache android?

Question

I am trying to use okhttpclient with retrofit to setup caching... How do I setup the expiration and add it to my restApiManager? Not sure what service is suppose to be...

Here is the code:

public class ApiManager {

    private static final String API_URL = "ip";


    public static AsynchronousApi getInstance() {
        if(service == null) {
            OkHttpClient okHttpClient = new OkHttpClient();
            File cacheDir = new File(System.getProperty("java.io.tmpdir"), UUID.randomUUID().toString());
            HttpResponseCache cache = null;
            try {
                cache = new HttpResponseCache(cacheDir, 1024);
            } catch (IOException e) {
                e.printStackTrace();
            }
            okHttpClient.setResponseCache(cache);

            RestAdapter restAdapter = new RestAdapter.Builder()
                    .setEndpoint(API_URL)
                    .setLogLevel(RestAdapter.LogLevel.FULL)
                    .setClient(new OkClient(okHttpClient))
                    .setErrorHandler(new ErrorHandler() {

                        @Override
                        public Throwable handleError(RetrofitError arg0) {
                            if(arg0.getResponse().getStatus() == 404)
                                return new Exception("Url does not exists");

                            return new Exception(arg0.getMessage());
                        }
                    })
                    .build();
            service = restAdapter.create(AsynchronousApi.class);
        }

        return service;
    }



//    //create adapter
    private static final AsynchronousApi ASYNCHRONOUS_API = getInstance();

    //call service to initiate
    public static AsynchronousApi getAsyncApi() {
        return ASYNCHRONOUS_API;
    }

    //Call interface
    public interface AsynchronousApi {

        //USER

        //Register User
        @FormUrlEncoded
        @POST("/register")
        public void registerUser(
                @Field("email") String email,
                @Field("username") String username,
                @Field("password") String password,
                Callback<UserResponse> callback); //


         //Search User
        @GET("/search_user")
        public void searchUser(
                @Query("username") String username,
                Callback<UserResponse> callback); // userfound  cache users

Answer 1

You are using the com.squareup.okhttp.OkHttpClient but you should rather use retrofit.client.OKClient which takes OkHttpClient as a parameter. Also if okhttp jar is already in your path you dont need to use this code at all. Only perhaps if you are facing trouble with cache availability.

 private static RestAdapter REST_ADAPTER = new RestAdapter.Builder()
        .setEndpoint(API_URL)
        .setLogLevel(RestAdapter.LogLevel.FULL)
        .setClient(new OkClient(okHttpClient))
        .build();