Caching in Picasso

问题

After reading several documentations, i want to clear some points

Reference: this

1. For Picasso to cache my image into memory, do i have to enable "Cache-control" header in my response?

2. If i am using OkHttpDownloader with Picasso,will it still require me to enable the header?

   public Picasso getImageLoader(Context ctx) {
   
   Picasso.Builder builder = new Picasso.Builder(ctx);
   
   builder.downloader(new OkHttpDownloader(ctx) {
       @Override
       protected HttpURLConnection openConnection(Uri uri) throws IOException {
           HttpURLConnection connection = super.openConnection(uri);
   
           connection.setRequestProperty("X-User",user.getUsername());
           connection.setRequestProperty("X-Token",user.getToken());
   
           return connection;
       }
   });
   return builder.build();
   }
   

3 Does disk caching work in Picasso on Android 4.3 or lower. Will it load my image from disk if the net is disconnected?

回答1:

In Picasso Caching is enabled by default.

and other settings you can do by this function memoryPolicy(,)

Picasso  
    .with(context)
    .load(UsageExampleListViewAdapter.eatFoodyImages[1])
    .memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE)
.into(imageViewFromDisk);

来源：https://stackoverflow.com/questions/25058531/caching-in-picasso