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 10MCache 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;  }}