Android Picasso clear image from disk and cache

Question

I'm using Picasso for image loading, I use it with NetworkPolicy.OFFLINE, but at some point I want to update the image from internet and I'm trying with

Picasso.with(context).invalidate(url);
Picasso.with(context).load(url).memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE).networkPolicy(NetworkPolicy.NO_CACHE);

But the image is still taken from disk, only the cache is invalidated.

score 1 · Answer 1 · answered Mar 10 '16 at 11:34

1

Use this:

Picasso.with(context).load(url).memoryPolicy(MemoryPolicy.NO_CACHE).into(image);

answered Mar 10 '16 at 11:34

Engr Waseem Arain

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what's the difference, ".into()" ? I want to invalidate the cache on app start and then I still don't have views to load into. – SpyZip Mar 10 '16 at 11:44

score 0 · Answer 2 · answered Mar 10 '16 at 11:42

You can clear cache programmatically using below code. You can use this code before you need to get images from API. If you want PICASSO to never cache images you can use code shared by waseem. but if you need it to cache but only sometimes you need to get images from API you can clear cache.

public static void trimCache(Context context) {
      try {
         File dir = context.getCacheDir();
         if (dir != null && dir.isDirectory()) {
            deleteDir(dir);
         }
      } catch (Exception e) {
         // TODO: handle exception
      }
   }


  public static boolean deleteDir(File dir) {
  if (dir != null && dir.isDirectory()) {
     String[] children = dir.list();
     for (int i = 0; i < children.length; i++) {
        boolean success = deleteDir(new File(dir, children[i]));
        if (!success) {
           return false;
        }
     }
     return dir.delete();
  }
  else {
     return false;
  }

I use for clear all the cache public class PicassoTools { public static void clearCache(Picasso p) { p.cache.clear(); } } — SpyZip, Mar 10 '16 at 11:49

score 0 · Answer 3 · answered Mar 11 '16 at 11:43

0

So I was calling this when I did not have any views available yet. The key is to call .into() method that triggers overwriting the cache. So I use only this:

Picasso.with(context).load(url).into(new ImageView(context));

answered Mar 11 '16 at 11:43

SpyZip

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Android Picasso clear image from disk and cache

3 Answers3