rubensousa/GravitySnapHelper

Is it possible to snap every X views?

AndroidDeveloperLB opened this issue · 16 comments

AndroidDeveloperLB commented

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 commented

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

AndroidDeveloperLB commented

Too bad. Thanks anyway

rubensousa commented

Check this issue: #29

AndroidDeveloperLB commented

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

rubensousa commented

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 commented

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

rubensousa commented

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 commented

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?

AndroidDeveloperLB commented

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 commented

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 commented

OK please let it be open, then.

albka1986 commented

@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 commented

@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

  • 👍1
albka1986 commented

Thanks