android - RecyclerView and Picasso images disappear after scrolling -

i didn't find answer here, here , here.

i have activity shows list of posts (with or without images). when scroll down , scroll or refresh list using swiperefreshlayout of images may disapper. use recyclerview show list of posts , picasso load images. here adapter binding:

@override public void onbindviewholder(itemviewholder holder, int position) {     // <...>     if (item.getphoto() != null) {         picasso.with(context)                 .load(item.getphoto())                 .into(holder.mpostphoto);     } else {         holder.mpostphoto.setimagedrawable(null);         holder.mpostphoto.setvisibility(view.gone);     } } 

i send http request posts , when have new data call postsadapter:

public void addall(list<postresponse> items) {     this.items.clear();     this.items.addall(items);      notifydatasetchanged(); } 

in mainactivity:

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     // <...>     mpostadapter = new postadapter();     mposts.setlayoutmanager(new linearlayoutmanager(mainactivity.this));     mposts.setadapter(mpostadapter);      mpostsswiperefresh.setonrefreshlistener(new swiperefreshlayout.onrefreshlistener() {         @override         public void onrefresh() {             updateposts();         }     });      updateposts(); }  private void updateposts() {     new api(this).getposts(new getpostscallback(this) {         @override         public void onsuccess(final paging<postresponse> paging) {             runonuithread(new runnable() {                 @override                 public void run() {                     mpostadapter.addall(paging.getdata());                     mpostsswiperefresh.setrefreshing(false);                 }             });         }     }); } 

i find it's pretty basic, don't understand why images disappear time after time. list not long , images resized before upload server, shouldn't use memory. , worst, when disappear, don't reload. may reload after scroll down , up...

• please explain me why happens.
• how can fix problem?

thanks!

so, apparently recyclerview recycling items list , reason couldn't reload images after that. question "why?"... maybe because did wrong, not sure. helped me:

recyclerview.getrecycledviewpool().setmaxrecycledviews(0, 0); 

basically turning off items recycling. works me because don't render huge lists of items.