android - Get RecyclerView last visible item -


findlastvisibleitemposition returns -1 following sequence:

onviewcreated() {     recyclerview.setadapter(adapter = new adapter());     adapter.updatecontent(list<content>); // call notifyitemrangechanged     post(new runnable() {         run() {             layoutmanager.getlastvisibleitem(); // == -1 (using runnable or not)         }     } }

it seems children views not ready yet. using tree observer on recyclerview seems solve problem, best approach last visible item after setting content adapter right after creation?


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