Imageview darg and drop into recylerview Android - android

I want to have a view inside a scrollable layout (Recyclerview with GridlayoutManager) with tiles (Views) in it. Dragging and dropping an item to RecyclerView.

Check this for drag and drop in recycler view.
https://medium.com/#ipaulpro/drag-and-swipe-with-recyclerview-6a6f0c422efd#.yt2erbko9
To know about drop event check this issue.
Update
For external views drag event check this.

Related

Recyclerview grid layout: Drag outside incompatible with scrolling?

I am building an android app with two recyclerviews, one with horizontal LinearLayoutManager and the other one with GridLayoutManager.
I want to allow the items recyclerviews to be dragged and dropped over a trash icon outside of the recyclerviews, obviously to delete the dragged item.
What I have done is:
Apply android:clipChildren in the parent of the two recyclerviews
Apply android:clipToPadding in the recyclerviews
This works perfectly in recyclerview with LinearLayoutManager. I can drag an item and drop it over an icon that is outside of the recylcerview.
I also works in the recyclerview with GridLayoutManager, but with a side effect. When I scroll in the grid recyclerview the scrolled items come out of the recyclerview.
At the ende of this GIF you can see the scrolling issue
So, Is there any way to allow dragging a recyclerview item outside of the recyclerview boundaries but preventing items comeout when scrolling?
Lots of thanks for your help and suggestions in advance
I tried putting the recyclerview with LinearLayoutManager on top of the recyclerview with GridLayoutManager, to hide the items which came out of the boundaries, but this make a strange behaivour when I drag an item, because the items are there yet, even they are hidden. I could make a GIF if needed
My last option is putting the trash icon inside of the recyclerview, as a header that appears when dragging an item, but I would prefer not do it that way
Finally what I have learnt is that you have two main options when face a drag and drop problem:
Easy way: Using the Android helper ItemTouchHelper
Hard way: Not using the helper and type all the code, using startDragAndDrop()
A scenario like this only can be solved by the hard way.

How to make row list using recyclerView and card? Can I use Nested RecyclerView?

I'm trying to design a row list using RecyclerView like Android TV ↳ android.support.v17.leanback.widget.ListRow. I'm able to design list with title but not row list. Can anyone help me?
Please Follow this Link for
Recycer view like play store
Use Two RecyclerView Outer Recycler is vertical and Second horizontal recycler is item of first recycler View
All you need is to call mInnerRecycler.setNestedScrollingEnabled(false); on your inner RecyclerViews and use Horizontal scrollview as root of mInnerRecyclerView
Explanation:
RecyclerView has support for nested scrolling introduced in API 21 through implementing the NestedScrollingChild interface. This is a valuable feature when you have a scrolling view inside another one that scrolls in the same direction and you want to scroll the inner View only when focused.
In any case, RecyclerView by default calls RecyclerView.setNestedScrollingEnabled(true); on itself when initializing. Now, back to the problem, since both of your RecyclerViews are within the same ViewPager that has the AppBarBehavior, the CoordinateLayout has to decide which scroll to respond to when you scroll from your inner RecyclerView; when your inner RecyclerView's nested scrolling is enabled, it gets the scrolling focus and the CoordinateLayout will choose to respond to its scrolling over the outer RecyclerView's scrolling. The thing is that, since your inner RecyclerViews don't scroll vertically, there is no vertical scroll change (from the CoordinateLayout's point of view), and if there is no change, the AppBarLayout doesn't change either.
In your case, because your inner RecyclerViews are scrolling in a different direction, you can disable it, thus causing the CoordinateLayout to disregard its scrolling and respond to the outer RecyclerView's scrolling.
Notice:
The xml attribute android:nestedScrollingEnabled="boolean" is not intended for use with the RecyclerView, and an attempt to use android:nestedScrollingEnabled="false" will result in a java.lang.NullPointerException so, at least for now, you will have to do it in code.
RecyclerView can check View Type for return header or item. And use layout manager for manage how to item scrolling direction.
RecyclerView (vertical scrolling)
- item -> RecyclerView (horizontal scrolling) check view type is header or item with condition example : is object has type header
Ref : Google play store like interface using recycler view

Scroll inside RecyclerView item

I have a vertical RecyclerView and inside every item a custom view with own horizontal scroll and scale. When I try to scroll view inside item I get scroll conflict RecyclerView interrupts touch event and tries to move the list.
How can I restrict RecyclerView to handle horizontal swipe event?
I tried to interrupt event via RecyclerView.OnItemTouchListener and pass them directly to my custom view. That almost works but sometimes I get wrong events and scroll in the custom view does not work.
Has someone else faced this problem?
Try use simple OnTouchListener instead OnItemTouchListener

Drag and drop a view into a recyclerview

How do i drag and drop a view (not in a recyclerview) into a recycler view at x position?
How do i display a temporary view to show the user where the item will be inserted within the recycler view if they were to drop at their current position?
Should I be implementing prepareForDrop() or something similar to do this? Simple examples will be a great help if possible.
I currently have an ItemTouchHelper to handle the onMove and onSwiped methods for list items already within the recycler view but don't know how to implement dropping a view from outside the recycler view into the recycler view itself.
Thanks

Drag and Drop view outside of Recyclerview

What I want to achieve: I want to have a view inside a scrollable layout (Recyclerview with GridlayoutManager) with tiles (Views) in it. Dragging and dropping an item inside of the RecyclerView should adjust the position of the icon and swap with the other elements. When a drag starts, an icon above the RecyclerView will change to a trash icon and dragging the view to this icon will delete it from this RecyclerView.
I tried this excellent tutorial, but I didn't find a way how to handle dragging outside of the Recyclerview as the ItemTouchHelper.Callback uses only Recycler.ViewHolder elements as possible targets.
The method interpolateOutOfBoundsScroll() gives feedback if the view moves out of the boundaries, but will only give back the total size that is offscreen, but no coordinates. Also, trying to drag the view out of the Recyclerview always results in cutting of the View where it passes the borders of the Recyclerview.
Does anyone have an idea how I could achieve this effect?
You can achieve this simply by set this attribute for the parent of the RecyclerView:
android:clipChildren="false"
Edit: thank Adam Katz, I don't know why but sometimes you have to add this to the RecyclerView to make it work:
android:clipToPadding="false"
You are bound by the RecyclerView boundries. You have several options:
Make the RecyclerView's layout height to match_parent and to be on top of your upper view (is it a Toolbar?) and add a sticky header of the same size and have an empty transparent layout. That way you could drag ther and see the item floating over there.
Instead of dragging an item to a garbage can icon which is located too close to a legitemate upper-right item, make a long click to select the item (and apply a signal like a check mark or a red mask) and make the garbage can appear and delete uppon click (and maybe allow multi item deleting)

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