Question

我使用来自FirebaseDatabase的数据填充Recyclerview（而不是FirebaseRecyclerView）。要接收的数据很多，是用户，可以达到数千。当我收到数据时，应用程序会滞后然后崩溃。我知道数据太多，所以工作很辛苦。有没有办法优化它？

我在logcat中有这个错误

The application may be doing too much work on its main thread

我没有留下深刻的印象，所以我寻求可能解决方案的帮助！谢谢

 recyclerView = (RecyclerView) findViewById(R.id.friend_list2);
    //recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
    recyclerView.setLayoutManager(new GridLayoutManager(this, 2));

    final DatabaseReference mPostReference = FirebaseDatabase.getInstance().getReference().child("user-profile");
    mPostReference.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {



            username = new ArrayList<>();
            uid = new ArrayList<String>();
            url = new ArrayList<String>();

            for (DataSnapshot data : dataSnapshot.getChildren()){
                final FriendItem friendItem = data.getValue(FriendItem.class);
                //final String friendItem2 = data.getKey();



                username.add(friendItem);
                //uid.add(friendItem2);

                adapter = new FriendHoldAdapter3(getApplicationContext(), username, uid, url);
                //adapter.setClickListener(FriendActivity3.this);
                recyclerView.setAdapter(adapter);

                /**
                adapter = new FriendHoldAdapter2(FriendActivity2.this, username, uid);
                adapter.setClickListener(FriendActivity2.this);
                recyclerView.setAdapter(adapter);
                 **/
                final List<FriendItem> filteredModelList = filter(username, "        ");
                adapter.setFilter(filteredModelList);


            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
        }});

Answer 1

Firebase按设计执行网络调用异步，但是在主线程上的onDataChange调用中发生任何事情，使用Asynctask将您的工作转移到某个工作线程。

崩溃从firebase获取许多数据

1 个答案: