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

Introduction

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

Prototype

public void clear() 

Source Link

Usage

From source file:com.mvcoding.financius.data.paging.PageLoader.java

@NonNull
public Observable<PageResult<T>> load(@NonNull DataConverter<T> dataConverter,
        @NonNull DatabaseQuery databaseQuery, @NonNull Observable<Page> pageObservable) {
    final SparseArrayCompat<T> cache = new SparseArrayCompat<>();
    final Observable<Cursor> cursorObservable = database.load(databaseQuery).doOnNext(cursor -> cache.clear());

    return Observable.combineLatest(pageObservable, cursorObservable, (page, cursor) -> {
        final List<T> items = new ArrayList<>();
        for (int i = page.getStart(), size = Math.min(cursor.getCount(),
                page.getStart() + page.getSize()); i < size; i++) {
            T item = cache.get(i);//from w  w w . ja v a2s  .co  m
            if (item == null) {
                cursor.moveToPosition(i);
                item = dataConverter.from(cursor);
                cache.put(i, item);
            }
            items.add(item);
        }

        return new PageResult<>(page, items, cache.size() == items.size());
    });
}

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