Android + Picasso: changing URL cache expiration

Question

I am using Picasso to download and display images in views all accros my application. Those images are changing very rarely (they are considered valid for a few months).

Answer 1

I solved it with a Home-made cache, the trick is to add a parameter to the URL that is not used, but making each URL different every X minutes

Calendar cal2 = Calendar.getInstance();
long d = cal2.getTimeInMillis();
int extra =  (int) Math.ceil(d/ (10*60*1000));    // 10 minutes cache

Picasso.with(getBaseContext())
            .load("http://www.myurl.cat/myimage.png&extra=" + extra)
            .placeholder(R.drawable.graphicLoading)
            .error(R.drawable.graphicLoadingError)
            .into(bottomGraphic);