azoft / carousellayoutmanager Goto Github PK

Hello, thanks for share this repository. It is perfect drawing UI for my application.

The only issue I am facing of the speed of loading. It takes 3-4 seconds for first time loading whenever application moves carousel page. (Please note that Carousel loading static cards and images with in application)

Do you have any solution for this? Kindly add me on skype -- mobileapplication

Best,
Shani Shah

Hi,

Thanks for the awesome library.

I've used it in my app and everything works great. However, i have a requirement to set the opacity level of next and previous item to as low as possible so that user's focus is mainly on center item.

Please help. Thanks in advance.

Regards
Sahmed

There is a way to disable infinite scroll?

It doesn't center on the desired position, instead on a seemingly random one

It seems good on Android.
Is there any iOS version available to have similar behaviour?
I appreciate your help on it.

Thanks,
Mehul.

where do i need to set the spacing between the center item?

Im using the following line to enable the zoom effects , layoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener());. The problem with this , even when I am scrolling , every item is getting zoomed when it comes to center , which I feel is distracting the user. How to remove this effect while scrolling ?

Regards,
Sasank

Hello,

thanks for a great library! Do you have any thoughts on how to use it on not fixed item height? For instance I have an item view with multiple text views which are generated in the adapter based on adapter data. If item view is higher than the defined fixed height the item view is cut off at the bottom.

Hi!

i used this library v1.1.9, and catch crash on rooted device nexus 5x with cyanogenmod and android 7.1.1.
bug is unboxing Integer mDecoratedChildWidth to int, when mDecoratedChildWidth == null
i looked v1.2.0, and this version is not fix this crash

info from fabric.io:

Device Nexus 5 CAF
ORIENTATION Portrait
PROXIMITY On

OS VERSION 7.1.1
UI ORIENTATION Portrait
ROOTED Yes

crash log:

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
at com.azoft.carousellayoutmanager.CarouselLayoutManager.getScrollItemSize(Unknown Source:590)
at com.azoft.carousellayoutmanager.CarouselLayoutManager.scrollBy(Unknown Source:258)
at com.azoft.carousellayoutmanager.CarouselLayoutManager.scrollHorizontallyBy(Unknown Source:233)
at android.support.v7.widget.RecyclerView.scrollByInternal(Unknown Source:1636)
at android.support.v7.widget.RecyclerView.onTouchEvent(Unknown Source:2759)
at android.view.View.dispatchTouchEvent(View.java:10024)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2626)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2307)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:413)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1808)
at android.app.Activity.dispatchTouchEvent(Activity.java:3061)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(Unknown Source:67)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:375)
at android.view.View.dispatchPointerEvent(View.java:10244)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4444)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4312)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3912)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3878)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4005)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3886)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4062)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3912)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3878)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3886)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6252)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6226)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6187)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6355)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(InputEventReceiver.java)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6326)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6378)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
at android.view.Choreographer.doCallbacks(Choreographer.java:686)
at android.view.Choreographer.doFrame(Choreographer.java:615)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6126)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Is there any option/method to set center by manually(programatically)?

Please help?

Thanks in avdance.

Hello!

I want to use your carousel, but i cant do that. Have you any tutorial?

Thank you!

Patricio from Argentina.

Hello,

Can I achieve a feature which is available on most of a carousel components implementation?
Right now if I click on an item which isn't centred (on the left or on the right) nothing happens.

What I have now is set onClickListner for each item in onBindViewHolder method.
I'd like to animate clicked item to a centre position somehow.

I have a TextView underneath the images and i wanna hide all textViews from children on the right and left and just show the one in the middle. is there a way to do that?

HORIZONTAL Recyclerview have 2 item and item place on each other
code :
layoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener()); recyclerview_transfer.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewsUtil.dpToPx(250))); recyclerview_transfer.setLayoutManager(layoutManager); recyclerview_transfer.setHasFixedSize(true); recyclerview_transfer.addOnScrollListener(new CenterScrollListener());

Just like in Android 5.0+ when you swipe though your notifications and they stack on top of each other on top and bottom of screen when they no longer fit the screen.

Excellent library and the idea. With your library, I would like to create the carousel with live load data, but I have a problem to insert data upward, notifiitemRangeInserted method does not work as it should work with usual adapter. There is a solution for this situation?

Thanks for help!)

Is it possible to disable circular loop of list items?

The idea of the recycler is to reuse the views, and not actually inflate them again once they've been inflated (similar to the ViewHolder Pattern), but according to our logging, CarouselLayoutManager is not recycling the views.

In the adapter, we added two log calls:

1. onCreateViewHolder ("onCreate called")
2. onBindViewHolder ("onBind called at position %s")

Attached is our output of the logs:

com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 6
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 7
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 8
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 9
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 10
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 11
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 12
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 13
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 14
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 15
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 16
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 17
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 18
com.example.scroller D/ScrollAdapter: onCreate called
com.example.scroller D/ScrollAdapter: onBind called at position 19

I'm trying to use the vertical version with CardViews inside a fragment but nothing is showing, I have pasted the code as this is just for testing I'm ignoring data.

This is the fragment:

public class FavoritesFragment extends Fragment {

    private static final String TAG = "FavoritesFragment";

    private Context mContext;
    private RecyclerView mRecyclerView;
    private CarouselLayoutManager mCoverFlowLayoutManager;
    private FavoritesAdapter mFavoritesAdapter;

    private ArrayList<String> testData;


    public FavoritesFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View layout = inflater.inflate(R.layout.fragment_favorites, container, false);

        mContext = getContext();

        testData = new ArrayList<>();
        testData.add("0");
        testData.add("1");
        testData.add("2");
        testData.add("3");
        testData.add("4");

        initRecyclerView(layout, testData);

        return layout;
    }



    private void initRecyclerView(View layout, ArrayList<String> testData) {

        mCoverFlowLayoutManager = new CarouselLayoutManager(CarouselLayoutManager.VERTICAL, true);
        mCoverFlowLayoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener());

        mRecyclerView = (RecyclerView)layout.findViewById(R.id.recyclerViewFavorites);
        mRecyclerView.setLayoutManager(mCoverFlowManager);
        mRecyclerView.setHasFixedSize(true);
        mRecyclerView.setAdapter(new FavoritesAdapter(testData, mContext));
        mRecyclerView.addOnScrollListener(new CenterScrollListener());



    }
    private class FavoritesAdapter extends RecyclerView.Adapter<FavoritesAdapter.ViewHolder> {

        private List<String> data;
        private Context mContext;

        // ViewHolder to hold the card
        public class ViewHolder extends RecyclerView.ViewHolder {

            private View mContainer;
            private ImageView mItemImage;
            private TextView mDescription;
            private TextView mPrice;
            private TextView mShippingDate;

            public ViewHolder(View cardView) {
                super(cardView);

                mContainer = cardView.findViewById(R.id.card_container);
                mItemImage = (ImageView)cardView.findViewById(R.id.card_item_image);
                mDescription = (TextView)cardView.findViewById(R.id.card_description);
                mPrice = (TextView)cardView.findViewById(R.id.card_description);
                mShippingDate = (TextView)cardView.findViewById(R.id.card_shipping);
            }
        }

        public FavoritesAdapter(List<String> data, Context context) {
            mContext = context;
            this.data = data;
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(mContext).inflate(R.layout.card_layout, parent, false);

            return new ViewHolder(view);
        }

        @Override
        public void onBindViewHolder(ViewHolder holder, int position) {

        }

        @Override
        public int getItemCount() {
            return data.size();
        }


    }

}

fragment_favorites.xml:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.panasonixx.asosplus.FavoritesFragment">

    <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerViewFavorites"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_centerInParent="true" />

</FrameLayout>

card_layout.xml:

<android.support.v7.widget.CardView xmlns:cardview="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/card_container"
    cardview:cardCornerRadius="2dp"
    cardview:cardElevation="4dp"
    cardview:cardUseCompatPadding="true">

    <RelativeLayout
        android:id="@+id/relativeLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <FrameLayout
            android:id="@+id/frameLayout"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_alignParentBottom="false"
            android:layout_alignParentTop="true"
            android:layout_alignParentEnd="false"
            android:layout_alignParentStart="false"
            android:layout_above="@+id/card_description">

            <LinearLayout
                android:id="@+id/linearView"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:background="@android:color/holo_purple"
                android:gravity="center_vertical"
                android:orientation="vertical"
                android:visibility="gone">

                <LinearLayout
                    android:id="@+id/layoutButtons"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:orientation="vertical"
                    android:visibility="gone">

                    <Button
                        style="@style/Widget.AppCompat.Button.Colored"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="@dimen/activity_vertical_margin"
                        android:text="@string/card_reveal_buy" />

                    <Button
                        style="@style/Widget.AppCompat.Button.Colored"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="@dimen/activity_vertical_margin"
                        android:text="@string/card_reveal_share" />

                    <Button
                        style="@style/Widget.AppCompat.Button.Colored"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/card_reveal_favorite" />


                </LinearLayout>

            </LinearLayout>

            <ImageView
                android:id="@+id/card_item_image"
                android:layout_width="match_parent"
                android:layout_height="440dp"
                android:adjustViewBounds="true"
                android:contentDescription="@string/image"
                android:src="@drawable/test_image"
                android:scaleType="centerCrop"
                android:layout_gravity="center_horizontal|top" />

        </FrameLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="@string/price"
            android:id="@+id/card_price"
            android:layout_alignParentBottom="true"
            android:layout_alignParentStart="true"
            android:layout_margin="2dp" />

        <TextView
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="@string/shipping"
            android:id="@+id/card_shipping"
            android:textAlignment="viewEnd"
            android:layout_alignTop="@+id/card_price"
            android:layout_alignParentEnd="true"
            android:layout_marginLeft="2dp"
            android:layout_marginRight="2dp"
            android:layout_marginTop="2dp"
            android:layout_marginBottom="2dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:text="@string/desc"
            android:id="@+id/card_description"
            android:textAlignment="center"
            android:layout_above="@+id/card_price"
            android:layout_alignParentStart="true"
            android:layout_alignEnd="@+id/card_shipping"
            android:layout_marginBottom="8dp" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="@string/card_image_description"
            android:id="@+id/card_shipping_icon"
            android:src="@drawable/ic_local_shipping"
            android:layout_alignTop="@+id/card_shipping"
            android:layout_toStartOf="@+id/card_shipping" />


    </RelativeLayout>


</android.support.v7.widget.CardView>

like this

I have an horizontal RecyclerView in which I'm trying to show a vertical carousel. Nothing is displayed.

If I show the same carousel (using the same code - recycler view, adapter, etc) outside of the horizontal RecyclerView it works.

And if I use a normal vertical RecyclerView (i.e. use LinearLayoutManager) in the horizontal RecyclerView instead of carousel, it also works (again, same code, I just change the layout manager + the configuration indicated in the readme).

Any ideas...?

Log:
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
at com.azoft.carousellayoutmanager.CarouselLayoutManager.getScrollItemSize(CarouselLayoutManager.java:574)
at com.azoft.carousellayoutmanager.CarouselLayoutManager.getMaxScrollOffset(CarouselLayoutManager.java:415)
at com.azoft.carousellayoutmanager.CarouselLayoutManager.getCurrentScrollPosition(CarouselLayoutManager.java:404)
at com.azoft.carousellayoutmanager.CarouselLayoutManager.getOffsetCenterView(CarouselLayoutManager.java:584)
at com.azoft.carousellayoutmanager.CenterScrollListener.onScrollStateChanged(CenterScrollListener.java:25)
at android.support.v7.widget.RecyclerView.dispatchOnScrollStateChanged(RecyclerView.java:3990)

I found that the background seems to be forced to change is not it?

Is it possible to change the size of the on focus image?
The difference is huge between the image and their left and right children.
By the way you did a great work!

Thanks
Giosk

Hi,
Thanks for your work.
How can I change this distance?
https://drive.google.com/open?id=0B9OWBQk6eUcmZUhWV0piLUZmQmc

Hi, after following the advice in the issue: #4 , and adjusting the zoom size and some of the spacing sizes and animation tends to jump around, especially when a carousel item settles at the centre point. Cheers

just add the animator like below, but the animateRemove is not called. Could you help this?

    recyclerView.setItemAnimator(new DefaultItemAnimator() {
        @Override
        public boolean animateRemove(RecyclerView.ViewHolder holder) {
            Log.e("carousel","animateRemove");
            return super.animateRemove(holder);
        }

        @Override
        public boolean animateAdd(RecyclerView.ViewHolder holder) {
            Log.e("carousel","animateAdd");
            return super.animateAdd(holder);
        }
    });

i'm using the vertical view for the carousel, but when i scroll the items, the center will kinda look jerky/jumpy its a bit circular transition, My code below

@OverRide
public ItemTransformation transformChild(@nonnull View child, float itemPositionToCenterDiff, int orientation) {
final float scale = (float) (2 * (2 * -StrictMath.atan(Math.abs(itemPositionToCenterDiff) + 1.30) / Math.PI + 1));

    // because scaling will make view smaller in its center, then we should move this item to the top or bottom to make it visible
    final float translateY;
    final float translateX;
    if (CarouselLayoutManager.VERTICAL == orientation) {
        final float translateYGeneral = child.getMeasuredHeight() * (1 - scale) * 2 * .50f;
        translateY = Math.signum(itemPositionToCenterDiff) * translateYGeneral;
        translateX = 0;
    } else {// 0.60

        final float translateXGeneral = (float) (child.getMeasuredWidth() * (0 - scale) / 2f);
        translateX = Math.signum(itemPositionToCenterDiff) * translateXGeneral;
        translateY = 0;
    }

    return new ItemTransformation(scale, scale, translateX, translateY);
}

Hi! You carousel is awesom :)
And working fine (bug with the animations turned out to be my problev, sorry).
But i have some questions:

• How to change the depth of the carousel?
• How to change the animation speed? (Its very fast in centering)

Regards Max

Hi,
I'm getting a crash when I call scrollToPosition() method, my code

 final CarouselLayoutManager layoutManager = new CarouselLayoutManager
                (CarouselLayoutManager.HORIZONTAL, false);
        Carousel2Adapter adapter = new Carousel2Adapter();
        ArrayList<Object> objects = getObjects();
        adapter.setObjects(objects);
        recyclerView.setAdapter(adapter);
        recyclerView.setHasFixedSize(true);
        layoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener());
        layoutManager.setMaxVisibleItems(1);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.addOnScrollListener(new CenterScrollListener());
        recyclerView.scrollToPosition(2);

I have tried with default LayoutManager (LinearLayoutManager) and it worked. exception I'm getting is

ava.lang.IllegalArgumentException: position can't be great then adapter items count. position is : 2

I have around 10 items is in my recycler view

Im using layoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener());

But it is giving me a spacing like this between the center item & 1st right, 1st left like this

How to reduce the gap ?

Regards,
Sasank

Hello.

I used your library in order to stack cards for my program.
Since it is a RecyclerView, I have added an ItemTouchListener to the RecyclerView in order to slide the items.

All is fine. But one issue I encountered was that when I slide the item left or right (but not removing it), then scrolling the list up / down very fast, my program would crash and will say

java.lang.IllegalArgumentException: Tmp detached view should be removed from RecyclerView before it can be recycled: ViewHolder{f0f213a position=5 id=-1, oldPos=-1, pLpos:-1 tmpDetached no parent}
at android.support.v7.widget.RecyclerView$Recycler.recycleViewHolderInternal(RecyclerView.java:5424)
at android.support.v7.widget.RecyclerView.removeAnimatingView(RecyclerView.java:1242)
at android.support.v7.widget.RecyclerView$ItemAnimatorRestoreListener.onAnimationFinished(RecyclerView.java:11151)
at android.support.v7.widget.RecyclerView$ItemAnimator.dispatchAnimationFinished(RecyclerView.java:11651)
at android.support.v7.widget.SimpleItemAnimator.dispatchMoveFinished(SimpleItemAnimator.java:279)
at android.support.v7.widget.DefaultItemAnimator$6.onAnimationEnd(DefaultItemAnimator.java:304)
at android.support.v4.view.ViewPropertyAnimatorCompatJB$1.onAnimationEnd(ViewPropertyAnimatorCompatJB.java:47)
at android.view.ViewPropertyAnimator$AnimatorEventListener.onAnimationEnd(ViewPropertyAnimator.java:1114)
at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1239)
at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:766)
at android.animation.ValueAnimator$AnimationHandler$1.run(ValueAnimator.java:801)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:920)
at android.view.Choreographer.doCallbacks(Choreographer.java:695)
at android.view.Choreographer.doFrame(Choreographer.java:628)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:906)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7229)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Hoping for your response on this issue. Thank you.

Hello,

Thank you for your amazing library. I am trying to find out the direction of scrolling while the center item changes. The problem exists when the adapter has only two items and the layout manager is circular. For example the first item displays the minute 0 and the second item displays the minute 30. The item in the center is the 30 one. When I scroll up the item changes correctly to 0 but I have no indication that the scroll happened forwards. The same thing happens when I scroll down and the item goes from 0 to 30 (backwards). The scrollBy(...) function gets a diff that may be bigger or lower than 0 in any given situation thus I am not able to distinct that the scroll happened backwards or forwards.

Any given thoughts?

How to implement pagination in this layout manager , unlike the other layout mangers i cant get the first and last visible item methods here ....

Hi,
I tried to smooth scroll to next item from carousel using two buttons(left and right). For this I used the following:

• left navigation: carouselLayoutManager.smoothScrollToPosition(listHorizontalRecyclerView, null, carouselLayoutManager.getCenterItemPosition() - 1);
• right navigation: carouselLayoutManager.smoothScrollToPosition(listHorizontalRecyclerView, null, carouselLayoutManager.getCenterItemPosition() + 1);
  Right navigation works good, but on left navigation, when I am on first item and try to navigate another one step to left, app crash, for both infinite and non infinite scroll modes.

Process: com.azoft.carousellayoutmanager.sample, PID: 31908
java.lang.IllegalArgumentException: Invalid target position
at android.support.v7.widget.RecyclerView$SmoothScroller.start(RecyclerView.java:9562)
at android.support.v7.widget.RecyclerView$LayoutManager.startSmoothScroll(RecyclerView.java:6596)
at com.azoft.carousellayoutmanager.CarouselLayoutManager.smoothScrollToPosition(CarouselLayoutManager.java:193)

There is a workaround for example for non infinite scroll to check when navigate left if carouselLayoutManager.getCenterItemPosition() != 0, but the issue is still there.

Hi, thanks for perfect library. I hava a problem about childs. Here is my implementation :

layoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener());
layoutManager.setMaxVisibleItems(4);

        recyclerView.setLayoutManager(layoutManager);
        // we expect only fixed sized item for now
        recyclerView.setHasFixedSize(true);
        // sample adapter with random data
        recyclerView.setAdapter(adapter);
        // enable center post scrolling
        recyclerView.addOnScrollListener(new CenterScrollListener());

here what i want to do : ios photo

here what i do : android

how can i make bigger these childs? thank you

Thanks for this great library.

When selection changes item scale & layout position is changed. Is it possible to add animation to make smooth transition? Thanks.

Hi,
When I scroll from one card to another very slowly it jumps from on to another. the scrolling is not smooth, I think you are bringing the next card immediately. can you make it pixel by pixel ? also is there any way that I can adjust the position of cards ?

Hey guys. Thanks for really great lib :) I have a question. I have only two items in view, and right left child is visible. How to put it behind center one, and show it on sides when items count is > than 2?)

Why I can‘t find the CLASS ItemViewBinding so that many problems happened...
I'm a beginner...

example:("ItemViewBinding" is red in the following code)

private static class TestViewHolder extends RecyclerView.ViewHolder {

    private final ItemViewBinding mItemViewBinding;

    TestViewHolder(final ItemViewBinding itemViewBinding) {
        super(itemViewBinding.getRoot());

        mItemViewBinding = itemViewBinding;
    }
}

Hello,
first thanks for great job you did on this project!

Secondly. I successfully used your library but now I am experiencing little problem.

When I try to change text of textview inside OnItemSelectionListener than immediately recyclerview jump to center item and scroll animation is not smooth but is completed immediately.

Any idea at least for some workaround? So far I postponed changing a text with runnable so if user scroll fast, than he will not experience this jumping.

Thank you!

Could you add the SnapHelper for scrolling to center?

I appreciate your help on it.
Thanks!

Hi,
is there a way to disable scroll?

Can provide findFirstVisibleItemPosition(),findLastVisibleItemPosition() method or provide a listener notify which item selected now ?

Hi Author,

I have downloaded 10 images from internet and i need to use this carosel for them. How to do so?

Alsoi need to open new activity on clicking any item of the carosel. Please help me in this.

Thanks

Love this lib! It's brilliant!

Every time a scroll occurs, ItemTransformation objects are created per view per scroll. This use of creating many ItemTransformation objects a lot of the time, it makes the GC fire off many times and therefore, you see jank. If an object pool is used, it would mean that the GC won't be fired constantly.

This would look something like adding a method to ItemTransformation.obtain(scaleX,scaleY,translationX,translationY) and using an object pool internally to get objects. Then once it's been used, just call release method on object and that tells the system it can be recycled.

Colt McAnlis explains the concept here: https://www.youtube.com/watch?v=bSOREVMEFnM

What do you think? Is it something worth exploring?

Hi! The carousel is great! I have a question... What do I have to set or change when the distance between each item are very large? I mean, I have a list of items but the height of each one is no too large, it just one textview. But when I implement the layout manager on vertical I get a distance between each one, and I want them to be overloaded.

Thanks :)