Is it possible to snap every X views?

[AndroidDeveloperLB]

For example, suppose I have tens of views to scroll through. If the user scrolled x/2 and a bit more, it will get to the X view.

[rubensousa]

This would require another custom SnapHelper. I don't have any plans to implement this, though.

[AndroidDeveloperLB]

Too bad. Thanks anyway

[rubensousa]

@AndroidDeveloperLB , I'm adding something similar in 2.2.0. It'll not be exactly snapping on X views, but instead limiting the fling distance. You can check this out here: https://github.com/rubensousa/RecyclerViewSnap/blob/develop/gravitysnaphelper/src/main/java/com/github/rubensousa/gravitysnaphelper/GravitySnapHelper.java#L293

You'll also be able to customise the snap speed: https://github.com/rubensousa/RecyclerViewSnap/blob/develop/gravitysnaphelper/src/main/java/com/github/rubensousa/gravitysnaphelper/GravitySnapHelper.java#L331

[rubensousa]

Check this issue: #29

[AndroidDeveloperLB]

Why close it if it's not the same? Can you please post a video of what was added?

[rubensousa]

It's not released yet, but it's in the develop branch if you want to check it out.

I closed the issue again since it's not really what you asked for, although it's similar. That's why I linked the other issue.

Here's a preview: https://drive.google.com/file/d/1vbJ5jz39cCcVgWIeGRv5vWF5ESOglDCr/view

[AndroidDeveloperLB]

It's not the same? But if it's not the same, why close it? I'm confused.

[rubensousa]

I closed it since I don't have plans to work on this specific feature at the moment. You closed this the last time because of that same reason

[AndroidDeveloperLB]

Sorry I don't remember. Anyway, you added something that seem what I wrote, no? What's the difference between what I requested and what you've added?

[rubensousa]

You wanted to snap every X views, however I've added support for limiting the maximum fling according to a value you can set through: https://github.com/rubensousa/RecyclerViewSnap/blob/decfb4102dcd8d741cce65f88e2d82e768d840b7/gravitysnaphelper/src/main/java/com/github/rubensousa/gravitysnaphelper/GravitySnapHelper.java#L274 And https://github.com/rubensousa/RecyclerViewSnap/blob/decfb4102dcd8d741cce65f88e2d82e768d840b7/gravitysnaphelper/src/main/java/com/github/rubensousa/gravitysnaphelper/GravitySnapHelper.java#L289

Limiting snapping on every X view is different, since you may have views with different width.

[AndroidDeveloperLB]

Oh right. Sorry for that. Why not consider adding this functionality ? It could be nice, for example, for a week view of a calendar app (shows a single week each time)

[rubensousa]

Because it requires time I don't have at the moment. However, I could leave this open so that anyone else could work on this instead. Meanwhile, If you need something similar, you could use the other approach.

[AndroidDeveloperLB]

OK please let it be open, then.

[albka1986]

@rubensousa Hello! Thanks for the lib it's very helpful. I have a question about the feature "every x" I understand that you provided some another feature, but I try to use it and don't have a profit. Here is my config:

    val snapHelper = GravitySnapHelper(Gravity.CENTER).apply {
            scrollMsPerInch = 1f
            maxFlingDistance = 20.dp.toPx()
            maxFlingSizeFraction = 0.0001f
        }
        snapHelper.attachToRecyclerView(recyclerView)
        snapHelper.scrollToPosition(Int.MAX_VALUE/2)

My view in XML:

   <com.github.rubensousa.gravitysnaphelper.GravitySnapRecyclerView
            android:id="@+id/camera_type_rv"
            android:layout_width="match_parent"
            android:layout_height="25dp"
            android:layout_marginStart="40dp"
            app:snapMaxFlingSizeFraction="0.1"
            android:layout_marginEnd="40dp"
            app:snapGravity="center"
            android:layout_marginBottom="100dp"
            android:animateLayoutChanges="false"
            android:orientation="horizontal"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            tools:itemCount="3" />

My goal is to go through the list one by one. But if it's impossible by this lib, I try to set slow speed of scrolling and it doesn't work with method scrollMsPerInch.

This is my current implementation: https://drive.google.com/file/d/1GuraO_nDQR8IE1jzjZyZ51eyiOzfXlOb/view?usp=sharing

That is what I want to have: https://drive.google.com/file/d/19k8MFVK69Xiorw1LErUgLt7-wEAQ0fat/view?usp=sharing

[rubensousa]

@albka1986 for that use case, you need custom touch event handling. It's not possible to scroll one item only. For that, you need PagerSnapHelper. Check this StackOverflow question: https://stackoverflow.com/questions/53483268/how-to-have-recyclerview-snapped-to-center-and-yet-be-able-to-scroll-to-all-item/53510142#53510142

[albka1986]

Thanks