androidx.recyclerview.widget.RecyclerView.ItemAnimator Java Examples

/**
 * Process a change event.
 * @param debug: string for debug usually the source of the call
 * @param checkItemAnimator: true if it need to check if ItemAnimator is running
 */
private void processChangeEvent(String debug, boolean checkItemAnimator) {
  final RecyclerView recyclerView = attachedRecyclerView;
  if (recyclerView != null) {
    final ItemAnimator itemAnimator = recyclerView.getItemAnimator();
    if (checkItemAnimator && itemAnimator != null) {
      // `itemAnimatorFinishedListener.onAnimationsFinished` will process visibility check
      // - If the animations are running `onAnimationsFinished` will be invoked on animations end.
      // - If the animations are not running `onAnimationsFinished` will be invoked right away.
      if (itemAnimator.isRunning(itemAnimatorFinishedListener)) {
        // If running process visibility now as `onAnimationsFinished` was not yet called
        processChangeEventWithDetachedView(null, debug);
      }
    } else {
      processChangeEventWithDetachedView(null, debug);
    }
  }
}
 

public boolean animateChange(@NonNull ItemAnimator itemAnimator, @NonNull ViewHolder oldHolder, @NonNull ViewHolder newHolder, @NonNull ItemHolderInfo preInfo, @NonNull ItemHolderInfo postInfo) {
  final FeatureAnimatorListener listener = viewTypeFeatureAnimatorMap.get(oldHolder.getItemViewType());
  if (listener != null) {
    final Animator animator = listener.setupChangeAnimation(itemAnimator, oldHolder, newHolder, preInfo, postInfo);
    if (animator != null) {
      animator.addListener(new CustomAnimationEndListener(itemAnimator, newHolder));
      viewHolderAnimatorMap.put(newHolder, animator);
      return true;
    }
  }
  return false;
}
 

CustomAnimationEndListener(ItemAnimator itemAnimator, ViewHolder holder) {
  this.holder = holder;
  this.itemAnimator = itemAnimator;
}
 

@OnMount
static void onMount(
    ComponentContext c,
    SectionsRecyclerView sectionsRecycler,
    @Prop Binder<RecyclerView> binder,
    @Prop(optional = true) boolean hasFixedSize,
    @Prop(optional = true) boolean clipToPadding,
    @Prop(optional = true) int leftPadding,
    @Prop(optional = true) int rightPadding,
    @Prop(optional = true) int topPadding,
    @Prop(optional = true) int bottomPadding,
    @Prop(optional = true, resType = ResType.COLOR) @Nullable
        Integer refreshProgressBarBackgroundColor,
    @Prop(optional = true, resType = ResType.COLOR) int refreshProgressBarColor,
    @Prop(optional = true) boolean clipChildren,
    @Prop(optional = true) boolean nestedScrollingEnabled,
    @Prop(optional = true) int scrollBarStyle,
    @Prop(optional = true) RecyclerView.ItemDecoration itemDecoration,
    @Prop(optional = true) boolean horizontalFadingEdgeEnabled,
    @Prop(optional = true) boolean verticalFadingEdgeEnabled,
    @Prop(optional = true, resType = ResType.DIMEN_SIZE) int fadingEdgeLength,
    @Prop(optional = true) @IdRes int recyclerViewId,
    @Prop(optional = true) int overScrollMode,
    @Prop(optional = true, isCommonProp = true) CharSequence contentDescription,
    @Prop(optional = true) ItemAnimator itemAnimator) {
  final RecyclerView recyclerView = sectionsRecycler.getRecyclerView();

  if (recyclerView == null) {
    throw new IllegalStateException(
        "RecyclerView not found, it should not be removed from SwipeRefreshLayout");
  }
  recyclerView.setContentDescription(contentDescription);
  recyclerView.setHasFixedSize(hasFixedSize);
  recyclerView.setClipToPadding(clipToPadding);
  sectionsRecycler.setClipToPadding(clipToPadding);
  ViewCompat.setPaddingRelative(
      recyclerView, leftPadding, topPadding, rightPadding, bottomPadding);
  recyclerView.setClipChildren(clipChildren);
  sectionsRecycler.setClipChildren(clipChildren);
  recyclerView.setNestedScrollingEnabled(nestedScrollingEnabled);
  sectionsRecycler.setNestedScrollingEnabled(nestedScrollingEnabled);
  recyclerView.setScrollBarStyle(scrollBarStyle);
  recyclerView.setHorizontalFadingEdgeEnabled(horizontalFadingEdgeEnabled);
  recyclerView.setVerticalFadingEdgeEnabled(verticalFadingEdgeEnabled);
  recyclerView.setFadingEdgeLength(fadingEdgeLength);
  // TODO (t14949498) determine if this is necessary
  recyclerView.setId(recyclerViewId);
  recyclerView.setOverScrollMode(overScrollMode);
  if (refreshProgressBarBackgroundColor != null) {
    sectionsRecycler.setProgressBackgroundColorSchemeColor(refreshProgressBarBackgroundColor);
  }
  sectionsRecycler.setColorSchemeColors(refreshProgressBarColor);

  if (itemDecoration != null) {
    recyclerView.addItemDecoration(itemDecoration);
  }

  sectionsRecycler.setItemAnimator(
      itemAnimator != RecyclerSpec.itemAnimator ? itemAnimator : new NoUpdateItemAnimator());

  binder.mount(recyclerView);
}
 

@ShouldUpdate(onMount = true)
protected static boolean shouldUpdate(
    @Prop Diff<Binder<RecyclerView>> binder,
    @Prop(optional = true) Diff<Boolean> hasFixedSize,
    @Prop(optional = true) Diff<Boolean> clipToPadding,
    @Prop(optional = true) Diff<Integer> leftPadding,
    @Prop(optional = true) Diff<Integer> rightPadding,
    @Prop(optional = true) Diff<Integer> topPadding,
    @Prop(optional = true) Diff<Integer> bottomPadding,
    @Prop(optional = true, resType = ResType.COLOR)
        Diff<Integer> refreshProgressBarBackgroundColor,
    @Prop(optional = true, resType = ResType.COLOR) Diff<Integer> refreshProgressBarColor,
    @Prop(optional = true) Diff<Boolean> clipChildren,
    @Prop(optional = true) Diff<Integer> scrollBarStyle,
    @Prop(optional = true) Diff<RecyclerView.ItemDecoration> itemDecoration,
    @Prop(optional = true) Diff<Boolean> horizontalFadingEdgeEnabled,
    @Prop(optional = true) Diff<Boolean> verticalFadingEdgeEnabled,
    @Prop(optional = true, resType = ResType.DIMEN_SIZE) Diff<Integer> fadingEdgeLength,
    @Prop(optional = true) Diff<ItemAnimator> itemAnimator,
    @State Diff<Integer> measureVersion) {

  if (measureVersion.getPrevious().intValue() != measureVersion.getNext().intValue()) {
    return true;
  }

  if (binder.getPrevious() != binder.getNext()) {
    return true;
  }

  if (!hasFixedSize.getPrevious().equals(hasFixedSize.getNext())) {
    return true;
  }

  if (!clipToPadding.getPrevious().equals(clipToPadding.getNext())) {
    return true;
  }

  if (!leftPadding.getPrevious().equals(leftPadding.getNext())) {
    return true;
  }

  if (!rightPadding.getPrevious().equals(rightPadding.getNext())) {
    return true;
  }

  if (!topPadding.getPrevious().equals(topPadding.getNext())) {
    return true;
  }

  if (!bottomPadding.getPrevious().equals(bottomPadding.getNext())) {
    return true;
  }

  if (!clipChildren.getPrevious().equals(clipChildren.getNext())) {
    return true;
  }

  if (!scrollBarStyle.getPrevious().equals(scrollBarStyle.getNext())) {
    return true;
  }

  if (!horizontalFadingEdgeEnabled.getPrevious().equals(horizontalFadingEdgeEnabled.getNext())) {
    return true;
  }

  if (!verticalFadingEdgeEnabled.getPrevious().equals(verticalFadingEdgeEnabled.getNext())) {
    return true;
  }

  if (!fadingEdgeLength.getPrevious().equals(fadingEdgeLength.getNext())) {
    return true;
  }

  Integer previousRefreshBgColor = refreshProgressBarBackgroundColor.getPrevious();
  Integer nextRefreshBgColor = refreshProgressBarBackgroundColor.getNext();
  if (previousRefreshBgColor == null
      ? nextRefreshBgColor != null
      : !previousRefreshBgColor.equals(nextRefreshBgColor)) {
    return true;
  }

  if (!refreshProgressBarColor.getPrevious().equals(refreshProgressBarColor.getNext())) {
    return true;
  }

  final ItemAnimator previousItemAnimator = itemAnimator.getPrevious();
  final ItemAnimator nextItemAnimator = itemAnimator.getNext();

  if (previousItemAnimator == null
      ? nextItemAnimator != null
      : !previousItemAnimator.getClass().equals(nextItemAnimator.getClass())) {
    return true;
  }

  final RecyclerView.ItemDecoration previous = itemDecoration.getPrevious();
  final RecyclerView.ItemDecoration next = itemDecoration.getNext();
  final boolean itemDecorationIsEqual =
      (previous == null) ? (next == null) : previous.equals(next);

  return !itemDecorationIsEqual;
}
 

public void setItemAnimator(ItemAnimator itemAnimator) {
  mDetachedItemAnimator = mRecyclerView.getItemAnimator();
  mRecyclerView.setItemAnimator(itemAnimator);
}