凌空NetworkImageView清晰缓存图像 [英] Volley NetworkImageView clear cached image

问题描述

有谁知道是否有可能清除缓存图像使用谷歌乱射库中的一NetworkImageView？

Does anybody know if it is possible to clear the cached image from a single NetworkImageView using Googles Volley library?

我有一个NetworkImageView化身图像，并想展示新形象，一旦我已经上传到服务器。在如果我做的那一刻   profileImg.setImageUrl（myUrl，mImageLoader）; 我得到的缓存图片

I have an avatar image in a NetworkImageView and would like to show the new image once I have uploaded it to the server. At the moment if I do profileImg.setImageUrl("myUrl", mImageLoader); I get the cached image.

推荐答案

所以要迟回答我的问题。最后我采取了不同的方法，以确保我总是化身图像的最新版本，它被证明是非常简单的。

So to belatedly answer my own question. I ended up taking a different approach to ensure that I always get the latest copy of an avatar image and it turned out to be very simple.

而不是试图清除从我用下面的方法缓存单独的图像。

Instead of trying to clear out an individual image from the cache I use the following method.

int time = (int) (System.currentTimeMillis());//gets the current time in milliseconds
String myUrl = "www.mySite.com?timestamp=" + String.ValueOf(time);
profileImg.setImageUrl("myUrl", mImageLoader);

这样做是为追加一个虚参数的URL我打电话来获得图像与当前时间戳。这保证了我一直在打电话给唯一的URL等于是我总是得到最先进的最新版本的图像。

What this does is to append an imaginary parameter to the url I call to get the image with a current timestamp. This guarantees that I am always making a call to a unique url and so therefore am always getting the most up-to-date version of that image.

这种方法的优点在于它并不局限于凌空然而，可以使用你选择做网络调用。

The beauty of this approach is that it is not limited to Volley and can be used however you choose to make network calls.

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