aloha.shiningstarbase.util.itemanimator.SlideInOutBottomItemAnimator.java Source code

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Here is the source code for aloha.shiningstarbase.util.itemanimator.SlideInOutBottomItemAnimator.java

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/*
 * ******************************************************************************
 *   Copyright (c) 2014-2015 Gabriele Mariotti.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *  *****************************************************************************
 */
package aloha.shiningstarbase.util.itemanimator;

import android.support.v4.view.ViewCompat;
import android.support.v4.view.ViewPropertyAnimatorCompat;
import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
 * @author Gabriele Mariotti (gabri.mariotti@gmail.com)
 */
public class SlideInOutBottomItemAnimator extends BaseItemAnimator {

    private float mOriginalY;
    private float mDeltaY;

    public SlideInOutBottomItemAnimator(RecyclerView recyclerView) {
        super(recyclerView);
    }

    protected void animateRemoveImpl(final RecyclerView.ViewHolder holder) {
        final View view = holder.itemView;

        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
        mRemoveAnimations.add(holder);
        animation.setDuration(getRemoveDuration()).alpha(0).translationY(+mDeltaY)
                .setListener(new VpaListenerAdapter() {
                    @Override
                    public void onAnimationStart(View view) {
                        dispatchRemoveStarting(holder);
                    }

                    @Override
                    public void onAnimationEnd(View view) {
                        animation.setListener(null);
                        ViewCompat.setAlpha(view, 1);
                        ViewCompat.setTranslationY(view, +mDeltaY);
                        dispatchRemoveFinished(holder);
                        mRemoveAnimations.remove(holder);
                        dispatchFinishedWhenDone();
                    }
                }).start();
    }

    @Override
    protected void prepareAnimateAdd(RecyclerView.ViewHolder holder) {
        retrieveItemPosition(holder);
        ViewCompat.setTranslationY(holder.itemView, +mDeltaY);
    }

    protected void animateAddImpl(final RecyclerView.ViewHolder holder) {
        final View view = holder.itemView;

        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
        mAddAnimations.add(holder);
        animation.translationY(0).alpha(1).setDuration(getAddDuration()).setListener(new VpaListenerAdapter() {
            @Override
            public void onAnimationStart(View view) {
                dispatchAddStarting(holder);
            }

            @Override
            public void onAnimationCancel(View view) {
                ViewCompat.setAlpha(view, 1);
                ViewCompat.setTranslationY(view, 0);
            }

            @Override
            public void onAnimationEnd(View view) {
                animation.setListener(null);
                ViewCompat.setAlpha(view, 1);
                ViewCompat.setTranslationY(view, 0);
                dispatchAddFinished(holder);
                mAddAnimations.remove(holder);
                dispatchFinishedWhenDone();
            }
        }).start();
    }

    private void retrieveItemPosition(final RecyclerView.ViewHolder holder) {
        mOriginalY = mRecyclerView.getLayoutManager().getDecoratedTop(holder.itemView);
        mDeltaY = mRecyclerView.getHeight() - mOriginalY;
    }

}