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 FadeInAnimator extends FlexibleItemAnimator { public FadeInAnimator() { } public FadeInAnimator(Interpolator interpolator) { mInterpolator = interpolator; } @Override protected void animateRemoveImpl(final RecyclerView.ViewHolder holder, final int index) { animateRemove(holder.itemView, holder, null, null); } @Override protected boolean preAnimateAddImpl(final RecyclerView.ViewHolder holder) { ViewCompat.setAlpha(holder.itemView, 0); return true; } @Override protected void animateAddImpl(final RecyclerView.ViewHolder holder, final int index) { animateAdd(holder.itemView, holder, null, null); } public void fadeInSingleView(View view, Runnable startAction, Runnable endAction) { animateAdd(view, null, startAction, endAction); } public void fadeOutSingleView(View view, Runnable startAction, Runnable endAction) { animateRemove(view, null, startAction, endAction); } private void animateRemove(View view, @Nullable RecyclerView.ViewHolder holder, Runnable startAction, Runnable endAction) { ViewPropertyAnimatorCompat viewAnimator = ViewCompat.animate(view).alpha(0).setDuration(getRemoveDuration()) .setInterpolator(mInterpolator); if (holder != null) viewAnimator.setListener(new DefaultRemoveVpaListener(holder)); if (startAction != null) viewAnimator.withStartAction(startAction); if (endAction != null) viewAnimator.withEndAction(endAction); viewAnimator.start(); } private void animateAdd(View view, @Nullable RecyclerView.ViewHolder holder, Runnable startAction, Runnable endAction) { ViewPropertyAnimatorCompat viewAnimator = ViewCompat.animate(view).alpha(1).setDuration(getAddDuration()) .setInterpolator(mInterpolator); if (holder != null) viewAnimator.setListener(new DefaultAddVpaListener(holder)); if (startAction != null) viewAnimator.withStartAction(startAction); if (endAction != null) viewAnimator.withEndAction(endAction); viewAnimator.start(); } }