Retrofit 2 OkHttpClient緩存不工作

所以這裏的問題，我試圖爲我的應用程序實現緩存，我遵循本教程Android: Cache network requests for offline access with Retrofit2 and OkHTTP3來做到這一點。可悲的是，緩存的響應沒有顯示出來時，有沒有互聯網連接，而不是Retrofit 2 OkHttpClient緩存不工作

Toast.makeText（的getContext（）的getContext（）。getResources（）。的getString（R.string.error_failed_to_load_posts），吐司。 LENGTH_SHORT）.show（）;

被執行。那麼誰能告訴我我做錯了什麼？或者引導我得到這個問題的答案？如果你問我，我會發布其他信息。以下是特定功能的完整代碼。

private void loadHomeLoggedPosts(String uid) { 
    progressBar.setVisibility(View.VISIBLE); 

    OkHttpClient client = new OkHttpClient 
      .Builder() 
      .cache(new Cache(getContext().getCacheDir(), 10 * 1024 * 1024)) // 10 MB 
      .addInterceptor(new Interceptor() { 
       @Override public okhttp3.Response intercept(Chain chain) throws IOException { 
        Request request = chain.request(); 
        if (Utils.isNetworkAvailable(getContext())) { 
         request = request.newBuilder().header("Cache-Control", "public, max-age=" + 60).build(); 
        } else { 
         request = request.newBuilder().header("Cache-Control", "public, only-if-cached, max-stale=" + 60 * 60 * 24 * 7).build(); 
        } 
        return chain.proceed(request); 
       } 
      }) 
      .build(); 

    Gson gson = new GsonBuilder() 
      .setLenient() 
      .create(); 

    Retrofit retrofit = new Retrofit.Builder() 
      .baseUrl(getResources().getString(R.string.app_base_url)) 
      .client(client) 
      .addConverterFactory(GsonConverterFactory.create(gson)) 
      .build(); 

    RequestInterface request = retrofit.create(RequestInterface.class); 
    Call<Classes> call = request.homeLoggedPosts(uid); 
    call.enqueue(new Callback<Classes>() { 
     @Override 
     public void onResponse(Call<Classes> call, Response<Classes> response) { 
      Classes jsonResponse = response.body(); 
      if (jsonResponse!=null) { 
       homePosts = jsonResponse.getHomePosts(); 
       homeLoggedInAdapter = new HomeLoggedInAdapter(homePosts); 
       recyclerView.setAdapter(homeLoggedInAdapter); 
       homeLoggedInAdapter.notifyDataSetChanged(); 
      } 
      else { 
       Toast.makeText(getContext(), getContext().getResources().getString(R.string.error_failed_to_load_posts), Toast.LENGTH_SHORT).show(); 
      } 
      progressBar.setVisibility(View.INVISIBLE); 
     } 

     @Override 
     public void onFailure(Call<Classes> call, Throwable t) { 
      progressBar.setVisibility(View.INVISIBLE); 
      Toast.makeText(getContext(), getContext().getResources().getString(R.string.error_failed_to_load_posts), Toast.LENGTH_SHORT).show(); 
      Log.d("ERROR", t.getMessage()); 
     } 
    }); 
}

編輯：我在同一個片段通話兩種功能如下：

if (FirebaseAuth.getInstance().getCurrentUser()!=null) { 
     loadHomeLoggedPosts(FirebaseAuth.getInstance().getCurrentUser().getUid()); 
    } 
    else { 
     loadHomeNotLoggedPosts(); 
    }

我已經張貼了loadHomeLoggedPosts上面的代碼。 loadHomeNotLoggedPosts是他的區別是隻有這部分是相同的：

RequestInterface request = retrofit.create(RequestInterface.class); 
Call<Classes> call = request.homeNotLoggedPosts();

Farmaan Elahis的回答適用於loadHomeNotLoggedPosts，而不是loadHomeLoggedPosts。任何幫助，高度讚賞。謝謝！

Okhttp log：我已經編輯了一些部分，因爲日誌太大而無法完全發佈。

拳啓動：

08-27 18:35:29.426 32673-32673/com.appsoflife.microstories I/System.out: Cache CREATED! 
08-27 18:35:29.452 32673-2498/com.appsoflife.microstories D/OkHttp: --> POST http://my_web_site.com/jacob/micro_stories/queries/home_logged.php http/1.1 
08-27 18:35:29.452 32673-2498/com.appsoflife.microstories D/OkHttp: Content-Type: application/x-www-form-urlencoded 
08-27 18:35:29.452 32673-2498/com.appsoflife.microstories D/OkHttp: Content-Length: 32 
08-27 18:35:29.452 32673-2498/com.appsoflife.microstories D/OkHttp: uid=MY_USER_ID 
08-27 18:35:29.452 32673-2498/com.appsoflife.microstories D/OkHttp: --> END POST (32-byte body) 
08-27 18:35:29.460 32673-2363/com.appsoflife.microstories D/AppTracker: App Event: start 
08-27 18:35:29.502 32673-32673/com.appsoflife.microstories E/RecyclerView: No adapter attached; skipping layout 
08-27 18:35:29.592 32673-32679/com.appsoflife.microstories I/art: Do partial code cache collection, code=27KB, data=30KB 
08-27 18:35:29.593 32673-32679/com.appsoflife.microstories I/art: After code cache collection, code=26KB, data=29KB 
08-27 18:35:29.593 32673-32679/com.appsoflife.microstories I/art: Increasing code cache capacity to 128KB 
08-27 18:35:29.614 32673-32673/com.appsoflife.microstories W/PropertyValuesHolder: Method set() with type float not found on target class class me.zhanghai.android.materialprogressbar.IndeterminateHorizontalProgressDrawable$RectTransformX 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: <-- 200 OK http://my_web_site.com/jacob/micro_stories/queries/home_logged.php (3634ms) 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Date: Sun, 27 Aug 2017 13:05:29 GMT 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Server: Apache/2.4.25 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: X-Powered-By: PHP/5.6.30 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Vary: Accept-Encoding,User-Agent 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Keep-Alive: timeout=5 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Connection: Keep-Alive 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Transfer-Encoding: chunked 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Content-Type: text/html; charset=UTF-8 
08-27 18:35:33.088 32673-2498/com.appsoflife.microstories D/OkHttp: Cache-Control: max-age=120 
08-27 18:35:37.890 32673-2653/com.appsoflife.microstories I/FirebaseCrash: Sending crashes 
08-27 18:35:41.664 32673-32695/com.appsoflife.microstories W/art: Suspending all threads took: 9.530ms 
08-27 18:35:41.681 32673-2498/com.appsoflife.microstories D/OkHttp: 

MY_JSON_OUTPUT_TOO_LONG_TO_POST 

08-27 18:35:41.721 32673-2498/com.appsoflife.microstories D/OkHttp: <-- END HTTP (3297402-byte body)

第二次：

08-27 18:37:35.904 5089-5089/com.appsoflife.microstories I/System.out: Cache CREATED! 
08-27 18:37:35.922 5089-5190/com.appsoflife.microstories D/OkHttp: --> POST http://my_web_site.com/jacob/micro_stories/queries/home_logged.php http/1.1 
08-27 18:37:35.922 5089-5190/com.appsoflife.microstories D/OkHttp: Content-Type: application/x-www-form-urlencoded 
08-27 18:37:35.922 5089-5190/com.appsoflife.microstories D/OkHttp: Content-Length: 32 
08-27 18:37:35.922 5089-5190/com.appsoflife.microstories D/OkHttp: uid=MY_USER_ID 
08-27 18:37:35.922 5089-5190/com.appsoflife.microstories D/OkHttp: --> END POST (32-byte body) 
08-27 18:37:35.934 5089-5135/com.appsoflife.microstories D/AppTracker: App Event: start 
08-27 18:37:35.979 5089-5089/com.appsoflife.microstories E/RecyclerView: No adapter attached; skipping layout 
08-27 18:37:36.058 5089-5094/com.appsoflife.microstories I/art: Do partial code cache collection, code=26KB, data=30KB 
08-27 18:37:36.058 5089-5094/com.appsoflife.microstories I/art: After code cache collection, code=25KB, data=29KB 
08-27 18:37:36.058 5089-5094/com.appsoflife.microstories I/art: Increasing code cache capacity to 128KB 
08-27 18:37:36.083 5089-5089/com.appsoflife.microstories W/PropertyValuesHolder: Method set() with type float not found on target class class me.zhanghai.android.materialprogressbar.IndeterminateHorizontalProgressDrawable$RectTransformX 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: <-- 200 OK http://my_web_site.com/jacob/micro_stories/queries/home_logged.php (3937ms) 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Date: Sun, 27 Aug 2017 13:07:36 GMT 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Server: Apache/2.4.25 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: X-Powered-By: PHP/5.6.30 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Vary: Accept-Encoding,User-Agent 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Keep-Alive: timeout=5 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Connection: Keep-Alive 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Transfer-Encoding: chunked 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Content-Type: text/html; charset=UTF-8 
08-27 18:37:39.860 5089-5190/com.appsoflife.microstories D/OkHttp: Cache-Control: max-age=120 
08-27 18:37:49.883 5089-5426/com.appsoflife.microstories I/FirebaseCrash: Sending crashes 
08-27 18:37:51.044 5089-5190/com.appsoflife.microstories D/OkHttp: 

JSON_OUTPUT_TOO_LONG_TO_POST 

read: unexpected EOF!

來源

2017-08-27 Jacob Celestine

您可以使用下面的代碼來構建你okhttp客戶端，它可以同時在線緩存有效期爲2分鐘以及離線緩存有效期爲7天。

PS：你需要考慮開放應用程序首次與互聯網連接的顯示，它不會拋出異常

private static OkHttpClient provideOkHttpClient() 
     { 
      return new OkHttpClient.Builder() 
        .addInterceptor(provideOfflineCacheInterceptor()) 
        .addNetworkInterceptor(provideCacheInterceptor()) 
        .cache(provideCache()) 
        .build(); 
     } 

     private static Cache provideCache() 
     { 
      Cache cache = null; 
      try 
      { 
       cache = new Cache(new File(getApplicationContext().getInstance().getCacheDir(), "http-cache"), 
         10 * 1024 * 1024); // 10 MB 
      } 
      catch (Exception e) 
      { 
       Timber.e(e, "Could not create Cache!"); 
      } 
      return cache; 
     } 

     public static Interceptor provideCacheInterceptor() 
     { 
      return new Interceptor() 
      { 
       @Override 
       public Response intercept (Chain chain) throws IOException 
       { 
        Response response = chain.proceed(chain.request()); 

        // re-write response header to force use of cache 
        CacheControl cacheControl = new CacheControl.Builder() 
          .maxAge(2, TimeUnit.MINUTES) 
          .build(); 

        return response.newBuilder() 
          .header(CACHE_CONTROL, cacheControl.toString()) 
          .build(); 
       } 
      }; 
     } 

     public static Interceptor provideOfflineCacheInterceptor() 
     { 
      return new Interceptor() 
      { 
       @Override 
       public Response intercept (Chain chain) throws IOException 
       { 
        Request request = chain.request(); 

        if (!AndroidUtils.isNetworkAvailable()) 
        { 
         CacheControl cacheControl = new CacheControl.Builder() 
           .maxStale(7, TimeUnit.DAYS) 
           .build(); 

         request = request.newBuilder() 
           .cacheControl(cacheControl) 
           .build(); 
        } 

        return chain.proceed(request); 
       } 
      }; 
     }

來源

2017-08-27 10:50:49

好吧，我會檢查，並讓你知道。謝謝。 –

感謝它的工作！有趣的故事，我已經嘗試了[SsKarthi/Retrofit2.0-with-Cache]的代碼（https://github.com/SsKarthi/Retrofit2.0-with-Cache），但當時它沒有工作，現在它的確如此：D –

這段代碼來自caster.io android tutorial。他們真的很好。你應該檢查出來 –

Retrofit 2 OkHttpClient緩存不工作

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