Retrofit + OkHttp缓存处理的示例代码

 //设置缓存路径 File httpCacheDirectory = new File(CommonApplication.getInstance().getCacheDir(), "responses"); //设置缓存 10M Cache cache = new Cache(httpCacheDirectory, 10 * 1024 * 1024); //创建OkHttpClient，并添加拦截器和缓存代码 OkHttpClient client = new OkHttpClient.Builder()     .addNetworkInterceptor(new CacheInterceptor(CommonApplication.getInstance()))     .cache(cache).build();

 public class CacheInterceptor implements Interceptor {   private Context mContext;   public CacheInterceptor(Context context) {     mContext = context;   }   @Override   public Response intercept(Chain chain) throws IOException {     Request request = chain.request();     if (NetworkUtils.isNetworkAvailable(mContext)) {//没网强制从缓存读取(必须得写，不然断网状态下，退出应用，或者等待一分钟后，就获取不到缓存）       request = request.newBuilder()           .cacheControl(CacheControl.FORCE_CACHE)           .build();     }     Response response = chain.proceed(request);     Response responseLatest;     if (NetworkUtils.isNetworkAvailable(mContext)) {       int maxAge = 60; //有网失效一分钟       responseLatest = response.newBuilder()           .removeHeader("Pragma")           .removeHeader("Cache-Control")           .header("Cache-Control", "public, max-age=" + maxAge)           .build();     } else {       int maxStale = 60 * 60 * 6; // 没网失效6小时       responseLatest = response.newBuilder()           .removeHeader("Pragma")           .removeHeader("Cache-Control")           .header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)           .build();     }     return responseLatest;   } }