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Updated add to Pocket anim to use proper RecyclerView plumbing.
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151 changes: 151 additions & 0 deletions
151
app/src/main/java/io/plaidapp/ui/HomeGridItemAnimator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /* | ||
| * Copyright 2015 Google Inc. | ||
| * | ||
| * 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 io.plaidapp.ui; | ||
|
|
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| import android.animation.Animator; | ||
| import android.animation.AnimatorListenerAdapter; | ||
| import android.animation.AnimatorSet; | ||
| import android.animation.ObjectAnimator; | ||
| import android.animation.PropertyValuesHolder; | ||
| import android.support.annotation.NonNull; | ||
| import android.support.v7.widget.DefaultItemAnimator; | ||
| import android.support.v7.widget.RecyclerView; | ||
| import android.transition.ArcMotion; | ||
| import android.view.View; | ||
| import android.view.ViewGroup; | ||
| import android.view.animation.AnimationUtils; | ||
|
|
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| import java.util.List; | ||
|
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| import io.plaidapp.util.ViewUtils; | ||
|
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| /** | ||
| * An extension to {@link DefaultItemAnimator} for running animations specific to our home grid. | ||
| */ | ||
| public class HomeGridItemAnimator extends DefaultItemAnimator { | ||
|
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| public static final int ANIMATE_ADD_POCKET = 7; | ||
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| @Override | ||
| public boolean canReuseUpdatedViewHolder(RecyclerView.ViewHolder viewHolder) { | ||
| return true; | ||
| } | ||
|
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| @NonNull | ||
| @Override | ||
| public ItemHolderInfo recordPreLayoutInformation(RecyclerView.State state, | ||
| RecyclerView.ViewHolder viewHolder, | ||
| int changeFlags, | ||
| List<Object> payloads) { | ||
| ItemHolderInfo info = super.recordPreLayoutInformation(state, viewHolder, changeFlags, | ||
| payloads); | ||
| if (payloads.contains(ANIMATE_ADD_POCKET)) { | ||
| DesignerNewsItemHolderInfo dnInfo = (DesignerNewsItemHolderInfo) info; | ||
| dnInfo.animateAddToPocket = true; | ||
| return dnInfo; | ||
| } | ||
| return info; | ||
| } | ||
|
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| @Override | ||
| public boolean animateChange(RecyclerView.ViewHolder oldHolder, | ||
| RecyclerView.ViewHolder newHolder, | ||
| ItemHolderInfo preInfo, | ||
| ItemHolderInfo postInfo) { | ||
| if (preInfo instanceof DesignerNewsItemHolderInfo | ||
| && ((DesignerNewsItemHolderInfo) preInfo).animateAddToPocket) { | ||
| final FeedAdapter.DesignerNewsStoryHolder holder = | ||
| (FeedAdapter.DesignerNewsStoryHolder) newHolder; | ||
|
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| // setup for anim | ||
| holder.itemView.setHasTransientState(true); | ||
| ((ViewGroup) holder.pocket.getParent().getParent()).setClipChildren(false); | ||
| final int initialLeft = holder.pocket.getLeft(); | ||
| final int initialTop = holder.pocket.getTop(); | ||
| final int translatedLeft = | ||
| (holder.itemView.getWidth() - holder.pocket.getWidth()) / 2; | ||
| final int translatedTop = | ||
| initialTop - ((holder.itemView.getHeight() - holder.pocket.getHeight()) / 2); | ||
| final ArcMotion arc = new ArcMotion(); | ||
|
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| // animate the title & pocket icon up, scale the pocket icon up | ||
| Animator titleMoveFadeOut = ObjectAnimator.ofPropertyValuesHolder(holder.title, | ||
| PropertyValuesHolder.ofFloat(View .TRANSLATION_Y, | ||
| -(holder.itemView.getHeight() / 5)), | ||
| PropertyValuesHolder.ofFloat(View.ALPHA, 0.54f)); | ||
|
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| Animator pocketMoveUp = ObjectAnimator.ofFloat(holder.pocket, | ||
| View.TRANSLATION_X, View.TRANSLATION_Y, | ||
| arc.getPath(initialLeft, initialTop, translatedLeft, translatedTop)); | ||
| Animator pocketScaleUp = ObjectAnimator.ofPropertyValuesHolder(holder.pocket, | ||
| PropertyValuesHolder.ofFloat(View.SCALE_X, 3f), | ||
| PropertyValuesHolder.ofFloat(View.SCALE_Y, 3f)); | ||
| ObjectAnimator pocketFadeUp = ObjectAnimator.ofInt(holder.pocket, | ||
| ViewUtils.IMAGE_ALPHA, 255); | ||
|
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| AnimatorSet up = new AnimatorSet(); | ||
| up.playTogether(titleMoveFadeOut, pocketMoveUp, pocketScaleUp, pocketFadeUp); | ||
| up.setDuration(300); | ||
| up.setInterpolator(AnimationUtils.loadInterpolator(holder.itemView.getContext(), | ||
| android.R.interpolator.fast_out_slow_in)); | ||
|
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| // animate everything back into place | ||
| Animator titleMoveFadeIn = ObjectAnimator.ofPropertyValuesHolder(holder.title, | ||
| PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, 0f), | ||
| PropertyValuesHolder.ofFloat(View.ALPHA, 1f)); | ||
| Animator pocketMoveDown = ObjectAnimator.ofFloat(holder.pocket, | ||
| View.TRANSLATION_X, View.TRANSLATION_Y, | ||
| arc.getPath(translatedLeft, translatedTop, 0, 0)); | ||
| Animator pvhPocketScaleDown = ObjectAnimator.ofPropertyValuesHolder(holder.pocket, | ||
| PropertyValuesHolder.ofFloat(View.SCALE_X, 1f), | ||
| PropertyValuesHolder.ofFloat(View.SCALE_Y, 1f)); | ||
| ObjectAnimator pocketFadeDown = ObjectAnimator.ofInt(holder.pocket, | ||
| ViewUtils.IMAGE_ALPHA, 138); | ||
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| AnimatorSet down = new AnimatorSet(); | ||
| down.playTogether(titleMoveFadeIn, pocketMoveDown, pvhPocketScaleDown, pocketFadeDown); | ||
| down.setDuration(300); | ||
| down.setInterpolator(AnimationUtils.loadInterpolator(holder.itemView.getContext(), | ||
| android.R.interpolator.fast_out_slow_in)); | ||
| down.setStartDelay(500); | ||
|
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| // play it | ||
| AnimatorSet upDown = new AnimatorSet(); | ||
| upDown.playSequentially(up, down); | ||
|
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| // clean up | ||
| upDown.addListener(new AnimatorListenerAdapter() { | ||
| @Override | ||
| public void onAnimationEnd(Animator animation) { | ||
| ((ViewGroup) holder.pocket.getParent().getParent()).setClipChildren(true); | ||
| holder.itemView.setHasTransientState(false); | ||
| } | ||
| }); | ||
| upDown.start(); | ||
| } | ||
| return super.animateChange(oldHolder, newHolder, preInfo, postInfo); | ||
| } | ||
|
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| @Override | ||
| public ItemHolderInfo obtainHolderInfo() { | ||
| return new DesignerNewsItemHolderInfo(); | ||
| } | ||
|
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| /* package */ class DesignerNewsItemHolderInfo extends ItemHolderInfo { | ||
| boolean animateAddToPocket; | ||
| } | ||
| } |