RecyclerView Line above items

Question

I have a RecyclerView with Horizontal and Vertical scrolling. Because, This is a Grid, with recyclerview. Why? Because It's much optimalized than simple Grid in ScrollViews.

I want to add a Line to recyclerview. Above the items. (Z coordinate)

This line need to scrolling with list items.

Anyone have idea how to do it? Can I add a new Layer above the items?

The headerView is a new item, before real items. Right? – ketom Nov 22 '17 at 09:25 — ketom, Nov 22 '17 at 09:25

score 1 · Accepted Answer · answered Nov 22 '17 at 09:32

1

I'd probably just add another view on top of the RecyclerView in the view hierarchy, add a ScrollListener to the RecyclerView and translate the line accordingly when the user scrolls.

<FrameLayout>

    <RecylerView
        ...
        />

    <View
        android:id="@+id/line"
        android:layout_width="2dp"
        android:layout_height="match_parent"
        android:background="#FF00FF"
        />

</FrameLayout>

answered Nov 22 '17 at 09:32

patrick.elmquist

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Yes, It is a good idea. I will wait for other ideas. This is a little problematic – ketom Nov 22 '17 at 09:44
Thank you. Finally, I made by this idea. This is work really good. – ketom Nov 23 '17 at 12:42

score 1 · Answer 2 · answered Nov 22 '17 at 09:56

First of all create a vertical view like this : (in general the correct way is to declare the View first and position the list above this View) :

<View
android:layout_width="1dp"
android:layout_height="fill_parent"
android:background="@android:color/holo_blue_light" />

And then declare your <RecyclerView />

N.B: if you have to use a simple layout, then use FrameLayout is more efficient, else use RelativeLayout (larger and more capable than the much simpler FrameLayout)

If I declare this view first, then it's behind the recycler. But It isn't scrolling with the recycler. — ketom, Nov 22 '17 at 11:07

RecyclerView Line above items

2 Answers2