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

Introduction

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

Prototype

public void clear() 

Source Link

Usage

From source file:com.devbrackets.android.recyclerext.adapter.header.HeaderAdapterDataObserver.java

/**
 * Performs a full calculation for the header indices
 *///w  ww  . java  2 s  .  c om
protected void calculateHeaderIndices() {
    List<HeaderItem> items = headerCore.getHeaderItems();
    LongSparseArray<Integer> counts = headerCore.getHeaderChildCountMap();

    items.clear();
    counts.clear();
    HeaderItem currentItem = null;

    for (int i = 0; i < headerApi.getChildCount(); i++) {
        long id = headerApi.getHeaderId(i);
        if (id == RecyclerView.NO_ID) {
            continue;
        }

        //Updates the child count for the headerId
        Integer childCount = counts.get(id);
        childCount = (childCount == null) ? 1 : childCount + 1;
        counts.put(id, childCount);

        //Adds new headers to the list when detected
        if (currentItem == null || currentItem.getId() != id) {
            int position = i + (headerCore.showHeaderAsChild ? 0 : items.size());
            currentItem = new HeaderItem(id, position);
            items.add(currentItem);
        }
    }
}

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From source file:com.geecko.QuickLyric.fragment.LocalLyricsFragment.java

public void addObserver(final LongSparseArray<Integer> itemIdTopMap) {
    final boolean[] firstAnimation = { true };
    final ViewTreeObserver observer = megaListView.getViewTreeObserver();
    observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        public boolean onPreDraw() {
            observer.removeOnPreDrawListener(this);
            firstAnimation[0] = true;//from w w  w .  j  av  a 2s .com
            int firstVisiblePosition = megaListView.getFirstVisiblePosition();
            for (int i = 0; i < megaListView.getChildCount(); ++i) {
                final View child = megaListView.getChildAt(i);
                int position = firstVisiblePosition + i;
                long itemId = getListView().getAdapter().getItemId(position);
                Integer formerTop = itemIdTopMap.get(itemId);
                int newTop = child.getTop();
                if (formerTop != null) {
                    if (formerTop != newTop) {
                        int delta = formerTop - newTop;
                        child.setTranslationY(delta);
                        int MOVE_DURATION = 500;
                        child.animate().setDuration(MOVE_DURATION).translationY(0);
                        if (firstAnimation[0]) {
                            child.animate().setListener(new AnimatorActionListener(new Runnable() {
                                public void run() {
                                    mSwiping = false;
                                    getListView().setEnabled(true);
                                }
                            }, AnimatorActionListener.ActionType.END));
                            firstAnimation[0] = false;
                        }
                    }
                } else {
                    // Animate new views along with the others. The catch is that they did not
                    // exist in the start state, so we must calculate their starting position
                    // based on neighboring views.
                    int childHeight = child.getHeight() + megaListView.getDividerHeight();
                    boolean isFurthest = true;
                    for (int j = 0; j < itemIdTopMap.size(); j++) {
                        Integer top = itemIdTopMap.valueAt(j);
                        if (top - childHeight > newTop) {
                            isFurthest = false;
                            break;
                        }
                    }
                    formerTop = newTop + (i > 0 ? childHeight : -childHeight);
                    int delta = formerTop - newTop;
                    int MOVE_DURATION = 500;
                    if (isFurthest) {
                        child.setTranslationY(delta);
                        child.animate().setDuration(MOVE_DURATION).translationY(0);
                    } else {
                        int translationX = formerTop > childHeight ? child.getWidth() : 0;
                        child.setTranslationX(translationX);
                        if (translationX == 0)
                            child.setTranslationY(formerTop - newTop);
                        child.animate().setDuration(MOVE_DURATION).translationX(0).translationY(0);
                    }
                    if (firstAnimation[0]) {
                        child.animate().setListener(new AnimatorActionListener(new Runnable() {
                            public void run() {
                                getListView().setEnabled(true);
                                mSwiping = false;
                            }
                        }, AnimatorActionListener.ActionType.END));
                        firstAnimation[0] = false;
                    }
                }
            }
            if (firstAnimation[0]) {
                mSwiping = false;
                getListView().setEnabled(true);
                firstAnimation[0] = false;
            }
            itemIdTopMap.clear();
            return true;
        }
    });
}

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