在NestedScrollView中使用RecyclerView时性能不佳 [英] Bad performance when use RecyclerView inside NestedScrollView
问题描述
我正在开发搜索联系人功能,在该屏幕上, NestedScrolView ( fillViewport = true )内有一个 RecyclerView .
屏幕设计:(此设计已被客户接受,我无法更改)
将当前设备的所有联系人加载到ArrayList中后,将从该数组中过滤搜索结果.
有几种情况使应用程序非常不方便:
1.当用户键入没有结果的输入时,然后用户进行清晰搜索,我必须再次显示所有结果. NestedScrollView 必须为 RecyclerView 的所有项目(例如:300个项目)呈现UI.
2.结果的数量有很多变化时(例如,从1到300个项目). NestedScrollView 必须为许多 RecyclerView
I'm developing a search contact feature, in that screen, there is a RecyclerView inside NestedScrolView (fillViewport = true).
Screen design: (This design is accepted by customer, I can't change it)
After loading all contacts of current device into an ArrayList, the search results are filtered from this array.
There is several cases that make the app very laggy:
1. When user type an input that have no result, then user clear search, I have to show all results again. The NestedScrollView has to render UI for all items of RecyclerView (for example: 300 items).
2. When the quantity of results has many changes (for example, from 1 to 300 items). The NestedScrollView has to render UI for a lot of items of RecyclerView
我知道此设计破坏了RecyclerView的回收技术,但我无法更改.
我尝试过的:
I know this design breaks recycling technique of RecyclerView, but I can't change it.
What I tried:
recyclerView.setNestedScrollingEnabled(false);
在AndroidManifest中:
In AndroidManifest:
android:windowSoftInputMode="adjustNothing"
适配器:
public class RecyclerContactAdapter extends RecyclerView.Adapter<RecyclerContactAdapter.ViewHolder> {
private List<MobileContact> contacts;
private Context context;
public RecyclerContactAdapter() {
contacts = new ArrayList<>();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
this.context = parent.getContext();
View view = LayoutInflater.from(context)
.inflate(R.layout.item_recycler_contact, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
//set data for view
}
@Override
public int getItemCount() {
return contacts.size();
}
protected class ViewHolder extends RecyclerView.ViewHolder {
private TextView tvAlphabetHeader;
private CircleImageView civAvatar;
private TextView tvContactName;
private TextView tvStatus;
private CheckBox cbInvited;
private RelativeLayout rlAlphabetHeader;
private RelativeLayout rlContainer;
protected ViewHolder(View itemView) {
super(itemView);
tvAlphabetHeader = itemView.findViewById(R.id.item_recycler_contact_tv_alphabet_header);
civAvatar = itemView.findViewById(R.id.item_recycler_contact_civ_avatar);
tvContactName = itemView.findViewById(R.id.item_recycler_contact_tv_name);
tvStatus = itemView.findViewById(R.id.item_recycler_contact_tv_status);
cbInvited = itemView.findViewById(R.id.item_recycler_contact_cb_contact);
rlAlphabetHeader = itemView.findViewById(R.id.item_recycler_contact_rl_alphabet);
rlContainer = itemView.findViewById(R.id.item_recycler_contact_rl_contact);
}
}
public void addAll(List<MobileContact> mobileContacts) {
this.contacts.clear();
this.contacts.addAll(mobileContacts);
notifyDataSetChanged();
}
public void add(MobileContact mobileContact) {
this.contacts.add(mobileContact);
}
public List<MobileContact> getContacts() {
return this.contacts;
}
}
推荐答案
您使用的RecyclerView错误.与其将RecyclerView放在NestedScrollView中,还不如将您的页眉"和搜索框"放在RecyclerView中,作为不同的视图类型.
You are using RecyclerView incorrectly. Instead of putting your RecyclerView inside NestedScrollView put your "Header" and "Search box" inside RecyclerView as different view types.
这个答案是一个很好的例子.
This answer is a good example.
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