CODEWITHSUNDEEP
androidandroid-recyclerview
Shanmugapriyan M
Shanmugapriyan M

Reputation: 301

RecyclerView notifydatasetchanged freeze the UI for some seconds in android

I have a vertical RecyclerView with each item having horizontal RecyclerView .

When i am updating the RecyclerView UI Freeze for some seconds.

update code :

public void setData(List<SectionList> data) {
        if (this.sectionListDetails != data) {
            this.sectionListDetails = data;
            notifyDataSetChanged();
        }
    }

Upvotes: 0

Views: 2323

Answers (2)

Rahul Sharma
Rahul Sharma

Reputation: 87

You can use notifyItemRangeChanged(startIndex, endIndex) to make the rendering faster. I am attaching my adapter add() method for your better understanding.

fun add(orders: List<OnlineOrderResponseModel.Data>, orderTab: String) {
    this.orderList.addAll(orders as ArrayList<OnlineOrderResponseModel.Data>)
    this.filterList.addAll(orders)
    notifyItemRangeChanged(((orderList.size-1) - (orders.size-1)), orderList.size)
}

Upvotes: 0

NotABot
NotABot

Reputation: 801

Using RecyclerView in RecyclerView is what is making it processing intensive and causing delayed rendering of views on screen. Also the computing comnplexity of your both adapter code matters how Android framework will execute it. But i think instead of calling notifyDataSetChanged() (which re-renders displayed items and also the nested horizontal adapter in every row which is apparently processing intensive) try using following methods which can help reduce unnecessary processing 

notifyItemChanged(int)
notifyItemInserted(int)
notifyItemRemoved(int)
notifyItemRangeChanged(int, int)
notifyItemRangeInserted(int, int)
notifyItemRangeRemoved(int, int)

using which you can taget to specific item(s). Check this link for more

Upvotes: 2

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