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FeedItemAnimator.java
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FeedItemAnimator.java
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package io.github.froger.instamaterial.ui.adapter;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.support.annotation.NonNull;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.OvershootInterpolator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import io.github.froger.instamaterial.R;
import io.github.froger.instamaterial.Utils;
/**
* Created by Miroslaw Stanek on 02.12.2015.
*/
public class FeedItemAnimator extends DefaultItemAnimator {
private static final DecelerateInterpolator DECCELERATE_INTERPOLATOR = new DecelerateInterpolator();
private static final AccelerateInterpolator ACCELERATE_INTERPOLATOR = new AccelerateInterpolator();
private static final OvershootInterpolator OVERSHOOT_INTERPOLATOR = new OvershootInterpolator(4);
Map<RecyclerView.ViewHolder, AnimatorSet> likeAnimationsMap = new HashMap<>();
Map<RecyclerView.ViewHolder, AnimatorSet> heartAnimationsMap = new HashMap<>();
private int lastAddAnimatedItem = -2;
@Override
public boolean canReuseUpdatedViewHolder(RecyclerView.ViewHolder viewHolder) {
return true;
}
@NonNull
@Override
public ItemHolderInfo recordPreLayoutInformation(@NonNull RecyclerView.State state,
@NonNull RecyclerView.ViewHolder viewHolder,
int changeFlags, @NonNull List<Object> payloads) {
if (changeFlags == FLAG_CHANGED) {
for (Object payload : payloads) {
if (payload instanceof String) {
return new FeedItemHolderInfo((String) payload);
}
}
}
return super.recordPreLayoutInformation(state, viewHolder, changeFlags, payloads);
}
@Override
public boolean animateAdd(RecyclerView.ViewHolder viewHolder) {
if (viewHolder.getItemViewType() == FeedAdapter.VIEW_TYPE_DEFAULT) {
if (viewHolder.getLayoutPosition() > lastAddAnimatedItem) {
lastAddAnimatedItem++;
runEnterAnimation((FeedAdapter.CellFeedViewHolder) viewHolder);
return false;
}
}
dispatchAddFinished(viewHolder);
return false;
}
private void runEnterAnimation(final FeedAdapter.CellFeedViewHolder holder) {
final int screenHeight = Utils.getScreenHeight(holder.itemView.getContext());
holder.itemView.setTranslationY(screenHeight);
holder.itemView.animate()
.translationY(0)
.setInterpolator(new DecelerateInterpolator(3.f))
.setDuration(700)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
dispatchAddFinished(holder);
}
})
.start();
}
@Override
public boolean animateChange(@NonNull RecyclerView.ViewHolder oldHolder,
@NonNull RecyclerView.ViewHolder newHolder,
@NonNull ItemHolderInfo preInfo,
@NonNull ItemHolderInfo postInfo) {
cancelCurrentAnimationIfExists(newHolder);
if (preInfo instanceof FeedItemHolderInfo) {
FeedItemHolderInfo feedItemHolderInfo = (FeedItemHolderInfo) preInfo;
FeedAdapter.CellFeedViewHolder holder = (FeedAdapter.CellFeedViewHolder) newHolder;
animateHeartButton(holder);
updateLikesCounter(holder, holder.getFeedItem().likesCount);
if (FeedAdapter.ACTION_LIKE_IMAGE_CLICKED.equals(feedItemHolderInfo.updateAction)) {
animatePhotoLike(holder);
}
}
return false;
}
private void cancelCurrentAnimationIfExists(RecyclerView.ViewHolder item) {
if (likeAnimationsMap.containsKey(item)) {
likeAnimationsMap.get(item).cancel();
}
if (heartAnimationsMap.containsKey(item)) {
heartAnimationsMap.get(item).cancel();
}
}
private void animateHeartButton(final FeedAdapter.CellFeedViewHolder holder) {
AnimatorSet animatorSet = new AnimatorSet();
ObjectAnimator rotationAnim = ObjectAnimator.ofFloat(holder.btnLike, "rotation", 0f, 360f);
rotationAnim.setDuration(300);
rotationAnim.setInterpolator(ACCELERATE_INTERPOLATOR);
ObjectAnimator bounceAnimX = ObjectAnimator.ofFloat(holder.btnLike, "scaleX", 0.2f, 1f);
bounceAnimX.setDuration(300);
bounceAnimX.setInterpolator(OVERSHOOT_INTERPOLATOR);
ObjectAnimator bounceAnimY = ObjectAnimator.ofFloat(holder.btnLike, "scaleY", 0.2f, 1f);
bounceAnimY.setDuration(300);
bounceAnimY.setInterpolator(OVERSHOOT_INTERPOLATOR);
bounceAnimY.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
holder.btnLike.setImageResource(R.drawable.ic_heart_red);
}
@Override
public void onAnimationEnd(Animator animation) {
heartAnimationsMap.remove(holder);
dispatchChangeFinishedIfAllAnimationsEnded(holder);
}
});
animatorSet.play(bounceAnimX).with(bounceAnimY).after(rotationAnim);
animatorSet.start();
heartAnimationsMap.put(holder, animatorSet);
}
private void updateLikesCounter(FeedAdapter.CellFeedViewHolder holder, int toValue) {
String likesCountTextFrom = holder.tsLikesCounter.getResources().getQuantityString(
R.plurals.likes_count, toValue - 1, toValue - 1
);
holder.tsLikesCounter.setCurrentText(likesCountTextFrom);
String likesCountTextTo = holder.tsLikesCounter.getResources().getQuantityString(
R.plurals.likes_count, toValue, toValue
);
holder.tsLikesCounter.setText(likesCountTextTo);
}
private void animatePhotoLike(final FeedAdapter.CellFeedViewHolder holder) {
holder.vBgLike.setVisibility(View.VISIBLE);
holder.ivLike.setVisibility(View.VISIBLE);
holder.vBgLike.setScaleY(0.1f);
holder.vBgLike.setScaleX(0.1f);
holder.vBgLike.setAlpha(1f);
holder.ivLike.setScaleY(0.1f);
holder.ivLike.setScaleX(0.1f);
AnimatorSet animatorSet = new AnimatorSet();
ObjectAnimator bgScaleYAnim = ObjectAnimator.ofFloat(holder.vBgLike, "scaleY", 0.1f, 1f);
bgScaleYAnim.setDuration(200);
bgScaleYAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator bgScaleXAnim = ObjectAnimator.ofFloat(holder.vBgLike, "scaleX", 0.1f, 1f);
bgScaleXAnim.setDuration(200);
bgScaleXAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator bgAlphaAnim = ObjectAnimator.ofFloat(holder.vBgLike, "alpha", 1f, 0f);
bgAlphaAnim.setDuration(200);
bgAlphaAnim.setStartDelay(150);
bgAlphaAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleUpYAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleY", 0.1f, 1f);
imgScaleUpYAnim.setDuration(300);
imgScaleUpYAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleUpXAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleX", 0.1f, 1f);
imgScaleUpXAnim.setDuration(300);
imgScaleUpXAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleDownYAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleY", 1f, 0f);
imgScaleDownYAnim.setDuration(300);
imgScaleDownYAnim.setInterpolator(ACCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleDownXAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleX", 1f, 0f);
imgScaleDownXAnim.setDuration(300);
imgScaleDownXAnim.setInterpolator(ACCELERATE_INTERPOLATOR);
animatorSet.playTogether(bgScaleYAnim, bgScaleXAnim, bgAlphaAnim, imgScaleUpYAnim, imgScaleUpXAnim);
animatorSet.play(imgScaleDownYAnim).with(imgScaleDownXAnim).after(imgScaleUpYAnim);
animatorSet.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
likeAnimationsMap.remove(holder);
resetLikeAnimationState(holder);
dispatchChangeFinishedIfAllAnimationsEnded(holder);
}
});
animatorSet.start();
likeAnimationsMap.put(holder, animatorSet);
}
private void dispatchChangeFinishedIfAllAnimationsEnded(FeedAdapter.CellFeedViewHolder holder) {
if (likeAnimationsMap.containsKey(holder) || heartAnimationsMap.containsKey(holder)) {
return;
}
dispatchAnimationFinished(holder);
}
private void resetLikeAnimationState(FeedAdapter.CellFeedViewHolder holder) {
holder.vBgLike.setVisibility(View.INVISIBLE);
holder.ivLike.setVisibility(View.INVISIBLE);
}
@Override
public void endAnimation(RecyclerView.ViewHolder item) {
super.endAnimation(item);
cancelCurrentAnimationIfExists(item);
}
@Override
public void endAnimations() {
super.endAnimations();
for (AnimatorSet animatorSet : likeAnimationsMap.values()) {
animatorSet.cancel();
}
}
public static class FeedItemHolderInfo extends ItemHolderInfo {
public String updateAction;
public FeedItemHolderInfo(String updateAction) {
this.updateAction = updateAction;
}
}
}