PhoneTabSwitcherLayout.java 文件源码

/**
 * Creates and returns an animation listener, which allows to inflate or remove the views, which
 * are used to visualize tabs, when an animation, which is used to hide the tab switcher,
 * has been finished.
 *
 * @return The animation listener, which has been created, as an instance of the type {@link
 * AnimatorListener}. The listener may not be null
 */
@NonNull
private AnimatorListener createHideSwitcherAnimationListener() {
    return new AnimatorListenerAdapter() {

        @Override
        public void onAnimationEnd(final Animator animation) {
            super.onAnimationEnd(animation);
            AbstractTabItemIterator iterator =
                    new TabItemIterator.Builder(getTabSwitcher(), viewRecycler).create();
            TabItem tabItem;

            while ((tabItem = iterator.next()) != null) {
                if (tabItem.getTab() == getModel().getSelectedTab()) {
                    Pair<View, Boolean> pair = viewRecycler.inflate(tabItem);
                    View view = pair.first;
                    FrameLayout.LayoutParams layoutParams =
                            (FrameLayout.LayoutParams) view.getLayoutParams();
                    view.setAlpha(1f);
                    getArithmetics().setScale(Axis.DRAGGING_AXIS, view, 1);
                    getArithmetics().setScale(Axis.ORTHOGONAL_AXIS, view, 1);
                    view.setX(layoutParams.leftMargin);
                    view.setY(layoutParams.topMargin);
                } else {
                    viewRecycler.remove(tabItem);
                }
            }

            viewRecycler.clearCache();
            recyclerAdapter.clearCachedPreviews();
            tabViewBottomMargin = -1;
        }

    };
}