使用Retrofit和Okhttp3实现网络缓存

公司需求：有网络请求最新数据，无网络请求缓存

@Singletonpublic class FreyNewRetrofit {    
  private FreyNewService freyService;    
  private Interceptor interceptor = new Interceptor() {        
    @Override        
    public Response intercept(Chain chain) throws IOException {            
      Request request = chain.request();            
      if (!NetWorkUtils.isNetworkAvailable()){                
        request = request.newBuilder().cacheControl(CacheControl.FORCE_CACHE).build();
      }            
      Response response = chain.proceed(request);            
      if (NetWorkUtils.isNetworkAvailable()){                
        int maxAge = 0;                
        response.newBuilder().header("Cache-Control", "public, max-age=" + maxAge)                        
            .removeHeader("Pragma")                        
            .build();            
      }else{                
        int maxStale = 60* 60* 24 * 7;                
        response.newBuilder().header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)                        
            .removeHeader("Pragma")                        
            .build();            
      }            
      return response;        
     }    
  };  
  
  @Inject    
  public FreyNewRetrofit() {        
    File cacheFile = new File(APP.getContext().getCacheDir(), "FreyCache");        
    Cache cache = new Cache(cacheFile, 1024 * 1024 * 100);        
    OkHttpClient okHttpClient = new OkHttpClient.Builder()                
      .addNetworkInterceptor(new StethoInterceptor())                
      .connectTimeout(10000, TimeUnit.MILLISECONDS)                
      .readTimeout(10000, TimeUnit.MILLISECONDS)                
      .addInterceptor(interceptor)                
      .cache(cache)                
      .build();   
     
    Retrofit retrofit = new Retrofit.Builder()                
      .baseUrl(UrlUtils.NEW_BASE_URL)                
      .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                
      .addConverterFactory(GsonConverterFactory.create())                
      .client(okHttpClient)                
      .build();        
      freyService = retrofit.create(FreyNewService.class);    
     }    
      public FreyNewService getFreyService(){        
        return freyService;    
      }
  }

有网没网都取缓存

Interceptor interceptor = new Interceptor() { 
    @Override public Response intercept(Chain chain) throws IOException { 
      Request request = chain.request(); 
      Response response = chain.proceed(request);     
      String cacheControl = request.cacheControl().toString(); 
      if (TextUtils.isEmpty(cacheControl)) { 
          cacheControl = "public, max-age=60"; 
      } 
      return response.newBuilder() .header("Cache-Control", cacheControl) .removeHeader("Pragma") .build(); 
    } 
  };