Example usage for android.support.v4.util LongSparseArray removeAt

Introduction

In this page you can find the example usage for android.support.v4.util LongSparseArray removeAt.

Prototype

public void removeAt(int i) 

Source Link

Usage

From source file:com.facebook.litho.MountState.java

private void unmountItem(ComponentContext context, int index, LongSparseArray<ComponentHost> hostsByMarker) {
    final MountItem item = getItemAt(index);

    // The root host item should never be unmounted as it's a reference
    // to the top-level LithoView.
    if (item == null || mLayoutOutputsIds[index] == ROOT_HOST_ID) {
        return;/*  w  w  w. ja  v  a 2s  .co m*/
    }

    final Object content = item.getContent();

    // Recursively unmount mounted children items.
    // This is the case when mountDiffing is enabled and unmountOrMoveOldItems() has a matching
    // sub tree. However, traversing the tree bottom-up, it needs to unmount a node holding that
    // sub tree, that will still have mounted items. (Different sequence number on LayoutOutput id)
    if ((content instanceof ComponentHost) && !(content instanceof LithoView)) {
        final ComponentHost host = (ComponentHost) content;

        // Concurrently remove items therefore traverse backwards.
        for (int i = host.getMountItemCount() - 1; i >= 0; i--) {
            final MountItem mountItem = host.getMountItemAt(i);
            final long layoutOutputId = mIndexToItemMap.keyAt(mIndexToItemMap.indexOfValue(mountItem));

            for (int mountIndex = mLayoutOutputsIds.length - 1; mountIndex >= 0; mountIndex--) {
                if (mLayoutOutputsIds[mountIndex] == layoutOutputId) {
                    unmountItem(context, mountIndex, hostsByMarker);
                    break;
                }
            }
        }

        if (host.getMountItemCount() > 0) {
            throw new IllegalStateException("Recursively unmounting items from a ComponentHost, left"
                    + " some items behind maybe because not tracked by its MountState");
        }
    }

    final ComponentHost host = item.getHost();
    host.unmount(index, item);

    unsetViewAttributes(item);

    final Component<?> component = item.getComponent();

    if (isHostSpec(component)) {
        final ComponentHost componentHost = (ComponentHost) content;
        hostsByMarker.removeAt(hostsByMarker.indexOfValue(componentHost));
        removeDisappearingMountContentFromComponentHost(componentHost);
    }

    unbindAndUnmountLifecycle(context, item);

    mIndexToItemMap.remove(mLayoutOutputsIds[index]);
    final String transitionKey = maybeDecrementTransitionKeyMountCount(item);

    if (transitionKey != null && mTransitionManager != null) {
        mTransitionManager.onContentUnmounted(transitionKey);
    }

    if (component.getLifecycle().canMountIncrementally()) {
        mCanMountIncrementallyMountItems.delete(mLayoutOutputsIds[index]);
    }

    ComponentsPools.release(context, item);

    mMountStats.unmountedCount++;
}

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