/* * Copyright (C) 2014 The Android Open Source Project * * 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 com.android.systemui.statusbar.stack; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.ObjectAnimator; import android.animation.PropertyValuesHolder; import android.animation.ValueAnimator; import android.view.View; import android.view.animation.AnimationUtils; import android.view.animation.Interpolator; import com.android.systemui.R; import com.android.systemui.statusbar.ExpandableView; import com.android.systemui.statusbar.SpeedBumpView; import java.util.ArrayList; import java.util.HashSet; import java.util.Set; import java.util.Stack; /** * An stack state animator which handles animations to new StackScrollStates */ public class StackStateAnimator { public static final int ANIMATION_DURATION_STANDARD = 360; public static final int ANIMATION_DURATION_GO_TO_FULL_SHADE = 448; public static final int ANIMATION_DURATION_APPEAR_DISAPPEAR = 464; public static final int ANIMATION_DURATION_DIMMED_ACTIVATED = 220; public static final int ANIMATION_DELAY_PER_ELEMENT_INTERRUPTING = 80; public static final int ANIMATION_DELAY_PER_ELEMENT_MANUAL = 32; public static final int ANIMATION_DELAY_PER_ELEMENT_GO_TO_FULL_SHADE = 48; private static final int DELAY_EFFECT_MAX_INDEX_DIFFERENCE = 2; private static final int TAG_ANIMATOR_TRANSLATION_Y = R.id.translation_y_animator_tag; private static final int TAG_ANIMATOR_TRANSLATION_Z = R.id.translation_z_animator_tag; private static final int TAG_ANIMATOR_SCALE = R.id.scale_animator_tag; private static final int TAG_ANIMATOR_ALPHA = R.id.alpha_animator_tag; private static final int TAG_ANIMATOR_HEIGHT = R.id.height_animator_tag; private static final int TAG_ANIMATOR_TOP_INSET = R.id.top_inset_animator_tag; private static final int TAG_END_TRANSLATION_Y = R.id.translation_y_animator_end_value_tag; private static final int TAG_END_TRANSLATION_Z = R.id.translation_z_animator_end_value_tag; private static final int TAG_END_SCALE = R.id.scale_animator_end_value_tag; private static final int TAG_END_ALPHA = R.id.alpha_animator_end_value_tag; private static final int TAG_END_HEIGHT = R.id.height_animator_end_value_tag; private static final int TAG_END_TOP_INSET = R.id.top_inset_animator_end_value_tag; private static final int TAG_START_TRANSLATION_Y = R.id.translation_y_animator_start_value_tag; private static final int TAG_START_TRANSLATION_Z = R.id.translation_z_animator_start_value_tag; private static final int TAG_START_SCALE = R.id.scale_animator_start_value_tag; private static final int TAG_START_ALPHA = R.id.alpha_animator_start_value_tag; private static final int TAG_START_HEIGHT = R.id.height_animator_start_value_tag; private static final int TAG_START_TOP_INSET = R.id.top_inset_animator_start_value_tag; private final Interpolator mFastOutSlowInInterpolator; private final int mGoToFullShadeAppearingTranslation; public NotificationStackScrollLayout mHostLayout; private ArrayList mNewEvents = new ArrayList<>(); private ArrayList mNewAddChildren = new ArrayList<>(); private Set mAnimatorSet = new HashSet<>(); private Stack mAnimationListenerPool = new Stack<>(); private AnimationFilter mAnimationFilter = new AnimationFilter(); private long mCurrentLength; private long mCurrentAdditionalDelay; /** The current index for the last child which was not added in this event set. */ private int mCurrentLastNotAddedIndex; private ValueAnimator mTopOverScrollAnimator; private ValueAnimator mBottomOverScrollAnimator; public StackStateAnimator(NotificationStackScrollLayout hostLayout) { mHostLayout = hostLayout; mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(hostLayout.getContext(), android.R.interpolator.fast_out_slow_in); mGoToFullShadeAppearingTranslation = hostLayout.getContext().getResources().getDimensionPixelSize( R.dimen.go_to_full_shade_appearing_translation); } public boolean isRunning() { return !mAnimatorSet.isEmpty(); } public void startAnimationForEvents( ArrayList mAnimationEvents, StackScrollState finalState, long additionalDelay) { processAnimationEvents(mAnimationEvents, finalState); int childCount = mHostLayout.getChildCount(); mAnimationFilter.applyCombination(mNewEvents); mCurrentAdditionalDelay = additionalDelay; mCurrentLength = NotificationStackScrollLayout.AnimationEvent.combineLength(mNewEvents); mCurrentLastNotAddedIndex = findLastNotAddedIndex(finalState); for (int i = 0; i < childCount; i++) { final ExpandableView child = (ExpandableView) mHostLayout.getChildAt(i); StackScrollState.ViewState viewState = finalState.getViewStateForView(child); if (viewState == null || child.getVisibility() == View.GONE) { continue; } child.setClipBounds(null); startAnimations(child, viewState, finalState, i); } if (!isRunning()) { // no child has preformed any animation, lets finish onAnimationFinished(); } mNewEvents.clear(); mNewAddChildren.clear(); } private int findLastNotAddedIndex(StackScrollState finalState) { int childCount = mHostLayout.getChildCount(); for (int i = childCount - 1; i >= 0; i--) { final ExpandableView child = (ExpandableView) mHostLayout.getChildAt(i); StackScrollState.ViewState viewState = finalState.getViewStateForView(child); if (viewState == null || child.getVisibility() == View.GONE) { continue; } if (!mNewAddChildren.contains(child)) { return viewState.notGoneIndex; } } return -1; } /** * Start an animation to the given viewState */ private void startAnimations(final ExpandableView child, StackScrollState.ViewState viewState, StackScrollState finalState, int i) { int childVisibility = child.getVisibility(); boolean wasVisible = childVisibility == View.VISIBLE; final float alpha = viewState.alpha; if (!wasVisible && alpha != 0 && !viewState.gone) { child.setVisibility(View.VISIBLE); } boolean yTranslationChanging = child.getTranslationY() != viewState.yTranslation; boolean zTranslationChanging = child.getTranslationZ() != viewState.zTranslation; boolean scaleChanging = child.getScaleX() != viewState.scale; boolean alphaChanging = alpha != child.getAlpha(); boolean heightChanging = viewState.height != child.getActualHeight(); boolean topInsetChanging = viewState.clipTopAmount != child.getClipTopAmount(); boolean wasAdded = mNewAddChildren.contains(child); boolean hasDelays = mAnimationFilter.hasDelays; boolean isDelayRelevant = yTranslationChanging || zTranslationChanging || scaleChanging || alphaChanging || heightChanging || topInsetChanging; boolean noAnimation = wasAdded; long delay = 0; long duration = mCurrentLength; if (hasDelays && isDelayRelevant || wasAdded) { delay = mCurrentAdditionalDelay + calculateChildAnimationDelay(viewState, finalState); } if (wasAdded && mAnimationFilter.hasGoToFullShadeEvent) { child.setTranslationY(child.getTranslationY() + mGoToFullShadeAppearingTranslation); yTranslationChanging = true; float longerDurationFactor = viewState.notGoneIndex - mCurrentLastNotAddedIndex; longerDurationFactor = (float) Math.pow(longerDurationFactor, 0.7f); duration = ANIMATION_DURATION_APPEAR_DISAPPEAR + 50 + (long) (100 * longerDurationFactor); } // start translationY animation if (yTranslationChanging) { if (noAnimation && !mAnimationFilter.hasGoToFullShadeEvent) { child.setTranslationY(viewState.yTranslation); } else { startYTranslationAnimation(child, viewState, duration, delay); } } // start translationZ animation if (zTranslationChanging) { if (noAnimation) { child.setTranslationZ(viewState.zTranslation); } else { startZTranslationAnimation(child, viewState, duration, delay); } } // start scale animation if (scaleChanging) { if (noAnimation) { child.setScaleX(viewState.scale); child.setScaleY(viewState.scale); } else { startScaleAnimation(child, viewState, duration); } } // start alpha animation if (alphaChanging && child.getTranslationX() == 0) { if (noAnimation) { child.setAlpha(viewState.alpha); } else { startAlphaAnimation(child, viewState, duration, delay); } } // start height animation if (heightChanging && child.getActualHeight() != 0) { if (noAnimation) { child.setActualHeight(viewState.height, false); } else { startHeightAnimation(child, viewState, duration, delay); } } // start top inset animation if (topInsetChanging) { if (noAnimation) { child.setClipTopAmount(viewState.clipTopAmount); } else { startInsetAnimation(child, viewState, duration, delay); } } // start dimmed animation child.setDimmed(viewState.dimmed, mAnimationFilter.animateDimmed && !wasAdded && !noAnimation); // start dark animation child.setDark(viewState.dark, mAnimationFilter.animateDark && !noAnimation); // apply speed bump state child.setBelowSpeedBump(viewState.belowSpeedBump); // start hiding sensitive animation child.setHideSensitive(viewState.hideSensitive, mAnimationFilter.animateHideSensitive && !wasAdded && !noAnimation, delay, duration); if (wasAdded) { child.performAddAnimation(delay, mCurrentLength); } if (child instanceof SpeedBumpView) { finalState.performSpeedBumpAnimation(i, (SpeedBumpView) child, viewState, delay + duration); } } private long calculateChildAnimationDelay(StackScrollState.ViewState viewState, StackScrollState finalState) { if (mAnimationFilter.hasGoToFullShadeEvent) { return calculateDelayGoToFullShade(viewState); } long minDelay = 0; for (NotificationStackScrollLayout.AnimationEvent event : mNewEvents) { long delayPerElement = ANIMATION_DELAY_PER_ELEMENT_INTERRUPTING; switch (event.animationType) { case NotificationStackScrollLayout.AnimationEvent.ANIMATION_TYPE_ADD: { int ownIndex = viewState.notGoneIndex; int changingIndex = finalState .getViewStateForView(event.changingView).notGoneIndex; int difference = Math.abs(ownIndex - changingIndex); difference = Math.max(0, Math.min(DELAY_EFFECT_MAX_INDEX_DIFFERENCE, difference - 1)); long delay = (DELAY_EFFECT_MAX_INDEX_DIFFERENCE - difference) * delayPerElement; minDelay = Math.max(delay, minDelay); break; } case NotificationStackScrollLayout.AnimationEvent.ANIMATION_TYPE_REMOVE_SWIPED_OUT: delayPerElement = ANIMATION_DELAY_PER_ELEMENT_MANUAL; case NotificationStackScrollLayout.AnimationEvent.ANIMATION_TYPE_REMOVE: { int ownIndex = viewState.notGoneIndex; boolean noNextView = event.viewAfterChangingView == null; View viewAfterChangingView = noNextView ? mHostLayout.getLastChildNotGone() : event.viewAfterChangingView; int nextIndex = finalState .getViewStateForView(viewAfterChangingView).notGoneIndex; if (ownIndex >= nextIndex) { // we only have the view afterwards ownIndex++; } int difference = Math.abs(ownIndex - nextIndex); difference = Math.max(0, Math.min(DELAY_EFFECT_MAX_INDEX_DIFFERENCE, difference - 1)); long delay = difference * delayPerElement; minDelay = Math.max(delay, minDelay); break; } default: break; } } return minDelay; } private long calculateDelayGoToFullShade(StackScrollState.ViewState viewState) { float index = viewState.notGoneIndex; index = (float) Math.pow(index, 0.7f); return (long) (index * ANIMATION_DELAY_PER_ELEMENT_GO_TO_FULL_SHADE); } private void startHeightAnimation(final ExpandableView child, StackScrollState.ViewState viewState, long duration, long delay) { Integer previousStartValue = getChildTag(child, TAG_START_HEIGHT); Integer previousEndValue = getChildTag(child, TAG_END_HEIGHT); int newEndValue = viewState.height; if (previousEndValue != null && previousEndValue == newEndValue) { return; } ValueAnimator previousAnimator = getChildTag(child, TAG_ANIMATOR_HEIGHT); if (!mAnimationFilter.animateHeight) { // just a local update was performed if (previousAnimator != null) { // we need to increase all animation keyframes of the previous animator by the // relative change to the end value PropertyValuesHolder[] values = previousAnimator.getValues(); int relativeDiff = newEndValue - previousEndValue; int newStartValue = previousStartValue + relativeDiff; values[0].setIntValues(newStartValue, newEndValue); child.setTag(TAG_START_HEIGHT, newStartValue); child.setTag(TAG_END_HEIGHT, newEndValue); previousAnimator.setCurrentPlayTime(previousAnimator.getCurrentPlayTime()); return; } else { // no new animation needed, let's just apply the value child.setActualHeight(newEndValue, false); return; } } ValueAnimator animator = ValueAnimator.ofInt(child.getActualHeight(), newEndValue); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { child.setActualHeight((int) animation.getAnimatedValue(), false /* notifyListeners */); } }); animator.setInterpolator(mFastOutSlowInInterpolator); long newDuration = cancelAnimatorAndGetNewDuration(duration, previousAnimator); animator.setDuration(newDuration); if (delay > 0 && (previousAnimator == null || !previousAnimator.isRunning())) { animator.setStartDelay(delay); } animator.addListener(getGlobalAnimationFinishedListener()); // remove the tag when the animation is finished animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { child.setTag(TAG_ANIMATOR_HEIGHT, null); child.setTag(TAG_START_HEIGHT, null); child.setTag(TAG_END_HEIGHT, null); } }); startAnimator(animator); child.setTag(TAG_ANIMATOR_HEIGHT, animator); child.setTag(TAG_START_HEIGHT, child.getActualHeight()); child.setTag(TAG_END_HEIGHT, newEndValue); } private void startInsetAnimation(final ExpandableView child, StackScrollState.ViewState viewState, long duration, long delay) { Integer previousStartValue = getChildTag(child, TAG_START_TOP_INSET); Integer previousEndValue = getChildTag(child, TAG_END_TOP_INSET); int newEndValue = viewState.clipTopAmount; if (previousEndValue != null && previousEndValue == newEndValue) { return; } ValueAnimator previousAnimator = getChildTag(child, TAG_ANIMATOR_TOP_INSET); if (!mAnimationFilter.animateTopInset) { // just a local update was performed if (previousAnimator != null) { // we need to increase all animation keyframes of the previous animator by the // relative change to the end value PropertyValuesHolder[] values = previousAnimator.getValues(); int relativeDiff = newEndValue - previousEndValue; int newStartValue = previousStartValue + relativeDiff; values[0].setIntValues(newStartValue, newEndValue); child.setTag(TAG_START_TOP_INSET, newStartValue); child.setTag(TAG_END_TOP_INSET, newEndValue); previousAnimator.setCurrentPlayTime(previousAnimator.getCurrentPlayTime()); return; } else { // no new animation needed, let's just apply the value child.setClipTopAmount(newEndValue); return; } } ValueAnimator animator = ValueAnimator.ofInt(child.getClipTopAmount(), newEndValue); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { child.setClipTopAmount((int) animation.getAnimatedValue()); } }); animator.setInterpolator(mFastOutSlowInInterpolator); long newDuration = cancelAnimatorAndGetNewDuration(duration, previousAnimator); animator.setDuration(newDuration); if (delay > 0 && (previousAnimator == null || !previousAnimator.isRunning())) { animator.setStartDelay(delay); } animator.addListener(getGlobalAnimationFinishedListener()); // remove the tag when the animation is finished animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { child.setTag(TAG_ANIMATOR_TOP_INSET, null); child.setTag(TAG_START_TOP_INSET, null); child.setTag(TAG_END_TOP_INSET, null); } }); startAnimator(animator); child.setTag(TAG_ANIMATOR_TOP_INSET, animator); child.setTag(TAG_START_TOP_INSET, child.getClipTopAmount()); child.setTag(TAG_END_TOP_INSET, newEndValue); } private void startAlphaAnimation(final ExpandableView child, final StackScrollState.ViewState viewState, long duration, long delay) { Float previousStartValue = getChildTag(child,TAG_START_ALPHA); Float previousEndValue = getChildTag(child,TAG_END_ALPHA); final float newEndValue = viewState.alpha; if (previousEndValue != null && previousEndValue == newEndValue) { return; } ObjectAnimator previousAnimator = getChildTag(child, TAG_ANIMATOR_ALPHA); if (!mAnimationFilter.animateAlpha) { // just a local update was performed if (previousAnimator != null) { // we need to increase all animation keyframes of the previous animator by the // relative change to the end value PropertyValuesHolder[] values = previousAnimator.getValues(); float relativeDiff = newEndValue - previousEndValue; float newStartValue = previousStartValue + relativeDiff; values[0].setFloatValues(newStartValue, newEndValue); child.setTag(TAG_START_ALPHA, newStartValue); child.setTag(TAG_END_ALPHA, newEndValue); previousAnimator.setCurrentPlayTime(previousAnimator.getCurrentPlayTime()); return; } else { // no new animation needed, let's just apply the value child.setAlpha(newEndValue); if (newEndValue == 0) { child.setVisibility(View.INVISIBLE); } } } ObjectAnimator animator = ObjectAnimator.ofFloat(child, View.ALPHA, child.getAlpha(), newEndValue); animator.setInterpolator(mFastOutSlowInInterpolator); // Handle layer type child.setLayerType(View.LAYER_TYPE_HARDWARE, null); animator.addListener(new AnimatorListenerAdapter() { public boolean mWasCancelled; @Override public void onAnimationEnd(Animator animation) { child.setLayerType(View.LAYER_TYPE_NONE, null); if (newEndValue == 0 && !mWasCancelled) { child.setVisibility(View.INVISIBLE); } child.setTag(TAG_ANIMATOR_ALPHA, null); child.setTag(TAG_START_ALPHA, null); child.setTag(TAG_END_ALPHA, null); } @Override public void onAnimationCancel(Animator animation) { mWasCancelled = true; } @Override public void onAnimationStart(Animator animation) { mWasCancelled = false; } }); long newDuration = cancelAnimatorAndGetNewDuration(duration, previousAnimator); animator.setDuration(newDuration); if (delay > 0 && (previousAnimator == null || !previousAnimator.isRunning())) { animator.setStartDelay(delay); } animator.addListener(getGlobalAnimationFinishedListener()); // remove the tag when the animation is finished animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { } }); startAnimator(animator); child.setTag(TAG_ANIMATOR_ALPHA, animator); child.setTag(TAG_START_ALPHA, child.getAlpha()); child.setTag(TAG_END_ALPHA, newEndValue); } private void startZTranslationAnimation(final ExpandableView child, final StackScrollState.ViewState viewState, long duration, long delay) { Float previousStartValue = getChildTag(child,TAG_START_TRANSLATION_Z); Float previousEndValue = getChildTag(child,TAG_END_TRANSLATION_Z); float newEndValue = viewState.zTranslation; if (previousEndValue != null && previousEndValue == newEndValue) { return; } ObjectAnimator previousAnimator = getChildTag(child, TAG_ANIMATOR_TRANSLATION_Z); if (!mAnimationFilter.animateZ) { // just a local update was performed if (previousAnimator != null) { // we need to increase all animation keyframes of the previous animator by the // relative change to the end value PropertyValuesHolder[] values = previousAnimator.getValues(); float relativeDiff = newEndValue - previousEndValue; float newStartValue = previousStartValue + relativeDiff; values[0].setFloatValues(newStartValue, newEndValue); child.setTag(TAG_START_TRANSLATION_Z, newStartValue); child.setTag(TAG_END_TRANSLATION_Z, newEndValue); previousAnimator.setCurrentPlayTime(previousAnimator.getCurrentPlayTime()); return; } else { // no new animation needed, let's just apply the value child.setTranslationZ(newEndValue); } } ObjectAnimator animator = ObjectAnimator.ofFloat(child, View.TRANSLATION_Z, child.getTranslationZ(), newEndValue); animator.setInterpolator(mFastOutSlowInInterpolator); long newDuration = cancelAnimatorAndGetNewDuration(duration, previousAnimator); animator.setDuration(newDuration); if (delay > 0 && (previousAnimator == null || !previousAnimator.isRunning())) { animator.setStartDelay(delay); } animator.addListener(getGlobalAnimationFinishedListener()); // remove the tag when the animation is finished animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { child.setTag(TAG_ANIMATOR_TRANSLATION_Z, null); child.setTag(TAG_START_TRANSLATION_Z, null); child.setTag(TAG_END_TRANSLATION_Z, null); } }); startAnimator(animator); child.setTag(TAG_ANIMATOR_TRANSLATION_Z, animator); child.setTag(TAG_START_TRANSLATION_Z, child.getTranslationZ()); child.setTag(TAG_END_TRANSLATION_Z, newEndValue); } private void startYTranslationAnimation(final ExpandableView child, StackScrollState.ViewState viewState, long duration, long delay) { Float previousStartValue = getChildTag(child,TAG_START_TRANSLATION_Y); Float previousEndValue = getChildTag(child,TAG_END_TRANSLATION_Y); float newEndValue = viewState.yTranslation; if (previousEndValue != null && previousEndValue == newEndValue) { return; } ObjectAnimator previousAnimator = getChildTag(child, TAG_ANIMATOR_TRANSLATION_Y); if (!mAnimationFilter.animateY) { // just a local update was performed if (previousAnimator != null) { // we need to increase all animation keyframes of the previous animator by the // relative change to the end value PropertyValuesHolder[] values = previousAnimator.getValues(); float relativeDiff = newEndValue - previousEndValue; float newStartValue = previousStartValue + relativeDiff; values[0].setFloatValues(newStartValue, newEndValue); child.setTag(TAG_START_TRANSLATION_Y, newStartValue); child.setTag(TAG_END_TRANSLATION_Y, newEndValue); previousAnimator.setCurrentPlayTime(previousAnimator.getCurrentPlayTime()); return; } else { // no new animation needed, let's just apply the value child.setTranslationY(newEndValue); return; } } ObjectAnimator animator = ObjectAnimator.ofFloat(child, View.TRANSLATION_Y, child.getTranslationY(), newEndValue); animator.setInterpolator(mFastOutSlowInInterpolator); long newDuration = cancelAnimatorAndGetNewDuration(duration, previousAnimator); animator.setDuration(newDuration); if (delay > 0 && (previousAnimator == null || !previousAnimator.isRunning())) { animator.setStartDelay(delay); } animator.addListener(getGlobalAnimationFinishedListener()); // remove the tag when the animation is finished animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { child.setTag(TAG_ANIMATOR_TRANSLATION_Y, null); child.setTag(TAG_START_TRANSLATION_Y, null); child.setTag(TAG_END_TRANSLATION_Y, null); } }); startAnimator(animator); child.setTag(TAG_ANIMATOR_TRANSLATION_Y, animator); child.setTag(TAG_START_TRANSLATION_Y, child.getTranslationY()); child.setTag(TAG_END_TRANSLATION_Y, newEndValue); } private void startScaleAnimation(final ExpandableView child, StackScrollState.ViewState viewState, long duration) { Float previousStartValue = getChildTag(child, TAG_START_SCALE); Float previousEndValue = getChildTag(child, TAG_END_SCALE); float newEndValue = viewState.scale; if (previousEndValue != null && previousEndValue == newEndValue) { return; } ObjectAnimator previousAnimator = getChildTag(child, TAG_ANIMATOR_SCALE); if (!mAnimationFilter.animateScale) { // just a local update was performed if (previousAnimator != null) { // we need to increase all animation keyframes of the previous animator by the // relative change to the end value PropertyValuesHolder[] values = previousAnimator.getValues(); float relativeDiff = newEndValue - previousEndValue; float newStartValue = previousStartValue + relativeDiff; values[0].setFloatValues(newStartValue, newEndValue); values[1].setFloatValues(newStartValue, newEndValue); child.setTag(TAG_START_SCALE, newStartValue); child.setTag(TAG_END_SCALE, newEndValue); previousAnimator.setCurrentPlayTime(previousAnimator.getCurrentPlayTime()); return; } else { // no new animation needed, let's just apply the value child.setScaleX(newEndValue); child.setScaleY(newEndValue); } } PropertyValuesHolder holderX = PropertyValuesHolder.ofFloat(View.SCALE_X, child.getScaleX(), newEndValue); PropertyValuesHolder holderY = PropertyValuesHolder.ofFloat(View.SCALE_Y, child.getScaleY(), newEndValue); ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(child, holderX, holderY); animator.setInterpolator(mFastOutSlowInInterpolator); long newDuration = cancelAnimatorAndGetNewDuration(duration, previousAnimator); animator.setDuration(newDuration); animator.addListener(getGlobalAnimationFinishedListener()); // remove the tag when the animation is finished animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { child.setTag(TAG_ANIMATOR_SCALE, null); child.setTag(TAG_START_SCALE, null); child.setTag(TAG_END_SCALE, null); } }); startAnimator(animator); child.setTag(TAG_ANIMATOR_SCALE, animator); child.setTag(TAG_START_SCALE, child.getScaleX()); child.setTag(TAG_END_SCALE, newEndValue); } private void startAnimator(ValueAnimator animator) { mAnimatorSet.add(animator); animator.start(); } /** * @return an adapter which ensures that onAnimationFinished is called once no animation is * running anymore */ private AnimatorListenerAdapter getGlobalAnimationFinishedListener() { if (!mAnimationListenerPool.empty()) { return mAnimationListenerPool.pop(); } // We need to create a new one, no reusable ones found return new AnimatorListenerAdapter() { private boolean mWasCancelled; @Override public void onAnimationEnd(Animator animation) { mAnimatorSet.remove(animation); if (mAnimatorSet.isEmpty() && !mWasCancelled) { onAnimationFinished(); } mAnimationListenerPool.push(this); } @Override public void onAnimationCancel(Animator animation) { mWasCancelled = true; } @Override public void onAnimationStart(Animator animation) { mWasCancelled = false; } }; } private static T getChildTag(View child, int tag) { return (T) child.getTag(tag); } /** * Cancel the previous animator and get the duration of the new animation. * * @param duration the new duration * @param previousAnimator the animator which was running before * @return the new duration */ private long cancelAnimatorAndGetNewDuration(long duration, ValueAnimator previousAnimator) { long newDuration = duration; if (previousAnimator != null) { // We take either the desired length of the new animation or the remaining time of // the previous animator, whichever is longer. newDuration = Math.max(previousAnimator.getDuration() - previousAnimator.getCurrentPlayTime(), newDuration); previousAnimator.cancel(); } return newDuration; } private void onAnimationFinished() { mHostLayout.onChildAnimationFinished(); } /** * Process the animationEvents for a new animation * * @param animationEvents the animation events for the animation to perform * @param finalState the final state to animate to */ private void processAnimationEvents( ArrayList animationEvents, StackScrollState finalState) { for (NotificationStackScrollLayout.AnimationEvent event : animationEvents) { final ExpandableView changingView = (ExpandableView) event.changingView; if (event.animationType == NotificationStackScrollLayout.AnimationEvent.ANIMATION_TYPE_ADD) { // This item is added, initialize it's properties. StackScrollState.ViewState viewState = finalState .getViewStateForView(changingView); if (viewState == null) { // The position for this child was never generated, let's continue. continue; } if (changingView.getVisibility() == View.GONE) { // The view was set to gone but the state never removed finalState.removeViewStateForView(changingView); continue; } changingView.setAlpha(viewState.alpha); changingView.setTranslationY(viewState.yTranslation); changingView.setTranslationZ(viewState.zTranslation); changingView.setActualHeight(viewState.height, false); mNewAddChildren.add(changingView); } else if (event.animationType == NotificationStackScrollLayout.AnimationEvent.ANIMATION_TYPE_REMOVE) { if (changingView.getVisibility() == View.GONE) { mHostLayout.getOverlay().remove(changingView); continue; } // Find the amount to translate up. This is needed in order to understand the // direction of the remove animation (either downwards or upwards) StackScrollState.ViewState viewState = finalState .getViewStateForView(event.viewAfterChangingView); int actualHeight = changingView.getActualHeight(); // upwards by default float translationDirection = -1.0f; if (viewState != null) { // there was a view after this one, Approximate the distance the next child // travelled translationDirection = ((viewState.yTranslation - (changingView.getTranslationY() + actualHeight / 2.0f)) * 2 / actualHeight); translationDirection = Math.max(Math.min(translationDirection, 1.0f),-1.0f); } changingView.performRemoveAnimation(ANIMATION_DURATION_APPEAR_DISAPPEAR, translationDirection, new Runnable() { @Override public void run() { // remove the temporary overlay mHostLayout.getOverlay().remove(changingView); } }); } mNewEvents.add(event); } } public void animateOverScrollToAmount(float targetAmount, final boolean onTop, final boolean isRubberbanded) { final float startOverScrollAmount = mHostLayout.getCurrentOverScrollAmount(onTop); if (targetAmount == startOverScrollAmount) { return; } cancelOverScrollAnimators(onTop); ValueAnimator overScrollAnimator = ValueAnimator.ofFloat(startOverScrollAmount, targetAmount); overScrollAnimator.setDuration(ANIMATION_DURATION_STANDARD); overScrollAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { float currentOverScroll = (float) animation.getAnimatedValue(); mHostLayout.setOverScrollAmount( currentOverScroll, onTop, false /* animate */, false /* cancelAnimators */, isRubberbanded); } }); overScrollAnimator.setInterpolator(mFastOutSlowInInterpolator); overScrollAnimator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { if (onTop) { mTopOverScrollAnimator = null; } else { mBottomOverScrollAnimator = null; } } }); overScrollAnimator.start(); if (onTop) { mTopOverScrollAnimator = overScrollAnimator; } else { mBottomOverScrollAnimator = overScrollAnimator; } } public void cancelOverScrollAnimators(boolean onTop) { ValueAnimator currentAnimator = onTop ? mTopOverScrollAnimator : mBottomOverScrollAnimator; if (currentAnimator != null) { currentAnimator.cancel(); } } /** * Get the end value of the height animation running on a view or the actualHeight * if no animation is running. */ public static int getFinalActualHeight(ExpandableView view) { if (view == null) { return 0; } ValueAnimator heightAnimator = getChildTag(view, TAG_ANIMATOR_HEIGHT); if (heightAnimator == null) { return view.getActualHeight(); } else { return getChildTag(view, TAG_END_HEIGHT); } } }