Volley NetworkImageView clear cached image

Question

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

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.

Answer 1

Check this out :

1) Turning off cache : If you want disable the cache for a particular url, you can use setShouldCache() method as below.

StringRequest stringReq = new StringRequest(....);
stringReq.setShouldCache(false);

2) Deleting cache for particular URL : Use remove() to delete cache of an URL.

yourRequestQueue.getCache().remove(url);

3) Deleting all the cache :

yourRequestQueue.getCache().clear(url);

Also, check out this link here.

Hope this helps.

Answer 2

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.

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);

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.

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

Answer 3

in the LruBitmapCache you should do diable put(url, bitmap) :

 @Override
    public void putBitmap(String url, Bitmap bitmap) {
       // put(url, bitmap);
    }

by this way every time you call the volley method image don't save to catch