Adding a new item to an existing index while retaining existing items

Question

How do I add an item to a RecyclerView at an index that currently has an item and retain any items that exist below it in stacking order? For example, if I have this list:

item = 0, item 1, item 2, ...

I want to insert an item into an existing index but without replacing the original value:

item = 0, item A, item 1, item 2, ...

The code I have used so far is:

public void addRecyclerObject(int position, Object recyclerObject) {
   recyclerObjects.add(position, recyclerObject);
   notifyItemInserted(position);
}

However, when I use execute the above code, the RecyclerView renders as such:

item = 0, item A, item 2, ...

item 1 is completely removed and replaced with another value. How can I insert another item without replacing an existing value? Any suggestions?

Are you using a List to generate the items within the RecyclerView? — Razor
– Razor, Commented Jul 4, 2016 at 1:44

Community · Accepted Answer · 2017-05-23 10:28:57Z

0

If you are using a List to intialise the items in your RecyclerView, you can easily insert it into an existing index and the original item stored in that location is moved without being replaced. For example:

list.add(1, "String 1")
list.add(2, "String 2")
list.add(2, "String 3")

String1 is inserted normally. String2 is inserted into the second position. String3 is also inserted into the second position, pushing String2 into the third position and altering the rest of the data set as well. If you need more help, look at this post. Tell me how you go.

edited May 23, 2017 at 10:28

CommunityBot

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answered Jul 4, 2016 at 8:35

Razor

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