Java tutorial
/* * Copyright (C) 2015 Wasabeef * * 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 de.base.utility.animators; import android.support.annotation.Nullable; import android.support.v4.view.ViewCompat; import android.support.v4.view.ViewPropertyAnimatorCompat; import android.support.v7.widget.RecyclerView; import android.view.View; import android.view.animation.Interpolator; import eu.davidea.flexibleadapter.common.FlexibleItemAnimator; public class SlideInDownAnimator extends FlexibleItemAnimator { public SlideInDownAnimator() { } public SlideInDownAnimator(Interpolator interpolator) { mInterpolator = interpolator; } @Override protected void animateRemoveImpl(final RecyclerView.ViewHolder holder, final int index) { animateRemove(holder.itemView, holder); } @Override protected boolean preAnimateAddImpl(final RecyclerView.ViewHolder holder) { ViewCompat.setTranslationY(holder.itemView, -holder.itemView.getHeight()); ViewCompat.setAlpha(holder.itemView, 0); return true; } @Override protected void animateAddImpl(final RecyclerView.ViewHolder holder, final int index) { animateAdd(holder.itemView, holder); } public void slideInDownSingleView(View view) { ViewCompat.setTranslationY(view, -view.getHeight()); ViewCompat.setAlpha(view, 0); animateAdd(view, null); } public void slideOutDownSingleView(View view) { animateRemove(view, null); } private void animateRemove(View view, @Nullable RecyclerView.ViewHolder holder) { ViewPropertyAnimatorCompat viewAnimator = ViewCompat.animate(view).translationY(-view.getHeight()).alpha(0) .setDuration(getRemoveDuration()).setInterpolator(mInterpolator); if (holder != null) { viewAnimator.setListener(new DefaultRemoveVpaListener(holder)); } viewAnimator.start(); } private void animateAdd(View view, @Nullable RecyclerView.ViewHolder holder) { ViewPropertyAnimatorCompat viewAnimator = ViewCompat.animate(view).translationY(0).alpha(1) .setDuration(getAddDuration()).setInterpolator(mInterpolator); if (holder != null) { viewAnimator.setListener(new DefaultAddVpaListener(holder)); } viewAnimator.start(); } }