| /* |
| * Copyright (C) 2019 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.bubbles.animation; |
| |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.graphics.Path; |
| import android.graphics.Point; |
| import android.graphics.PointF; |
| import android.view.DisplayCutout; |
| import android.view.View; |
| import android.view.WindowInsets; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import androidx.dynamicanimation.animation.DynamicAnimation; |
| import androidx.dynamicanimation.animation.SpringForce; |
| |
| import com.android.systemui.Interpolators; |
| import com.android.systemui.R; |
| import com.android.systemui.util.magnetictarget.MagnetizedObject; |
| |
| import com.google.android.collect.Sets; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.Set; |
| |
| /** |
| * Animation controller for bubbles when they're in their expanded state, or animating to/from the |
| * expanded state. This controls the expansion animation as well as bubbles 'dragging out' to be |
| * dismissed. |
| */ |
| public class ExpandedAnimationController |
| extends PhysicsAnimationLayout.PhysicsAnimationController { |
| |
| /** |
| * How much to translate the bubbles when they're animating in/out. This value is multiplied by |
| * the bubble size. |
| */ |
| private static final int ANIMATE_TRANSLATION_FACTOR = 4; |
| |
| /** Duration of the expand/collapse target path animation. */ |
| private static final int EXPAND_COLLAPSE_TARGET_ANIM_DURATION = 175; |
| |
| /** Stiffness for the expand/collapse path-following animation. */ |
| private static final int EXPAND_COLLAPSE_ANIM_STIFFNESS = 1000; |
| |
| /** What percentage of the screen to use when centering the bubbles in landscape. */ |
| private static final float CENTER_BUBBLES_LANDSCAPE_PERCENT = 0.66f; |
| |
| /** |
| * Velocity required to dismiss an individual bubble without dragging it into the dismiss |
| * target. |
| */ |
| private static final float FLING_TO_DISMISS_MIN_VELOCITY = 6000f; |
| |
| /** Horizontal offset between bubbles, which we need to know to re-stack them. */ |
| private float mStackOffsetPx; |
| /** Space between status bar and bubbles in the expanded state. */ |
| private float mBubblePaddingTop; |
| /** Size of each bubble. */ |
| private float mBubbleSizePx; |
| /** Space between bubbles in row above expanded view. */ |
| private float mSpaceBetweenBubbles; |
| /** Height of the status bar. */ |
| private float mStatusBarHeight; |
| /** Size of display. */ |
| private Point mDisplaySize; |
| /** Max number of bubbles shown in row above expanded view. */ |
| private int mBubblesMaxRendered; |
| /** What the current screen orientation is. */ |
| private int mScreenOrientation; |
| |
| private boolean mAnimatingExpand = false; |
| private boolean mAnimatingCollapse = false; |
| private @Nullable Runnable mAfterExpand; |
| private Runnable mAfterCollapse; |
| private PointF mCollapsePoint; |
| |
| /** |
| * Whether the dragged out bubble is springing towards the touch point, rather than using the |
| * default behavior of moving directly to the touch point. |
| * |
| * This happens when the user's finger exits the dismiss area while the bubble is magnetized to |
| * the center. Since the touch point differs from the bubble location, we need to animate the |
| * bubble back to the touch point to avoid a jarring instant location change from the center of |
| * the target to the touch point just outside the target bounds. |
| */ |
| private boolean mSpringingBubbleToTouch = false; |
| |
| /** |
| * Whether to spring the bubble to the next touch event coordinates. This is used to animate the |
| * bubble out of the magnetic dismiss target to the touch location. |
| * |
| * Once it 'catches up' and the animation ends, we'll revert to moving it directly. |
| */ |
| private boolean mSpringToTouchOnNextMotionEvent = false; |
| |
| /** The bubble currently being dragged out of the row (to potentially be dismissed). */ |
| private MagnetizedObject<View> mMagnetizedBubbleDraggingOut; |
| |
| private int mExpandedViewPadding; |
| |
| public ExpandedAnimationController(Point displaySize, int expandedViewPadding, |
| int orientation) { |
| updateOrientation(orientation, displaySize); |
| mExpandedViewPadding = expandedViewPadding; |
| } |
| |
| /** |
| * Whether the individual bubble has been dragged out of the row of bubbles far enough to cause |
| * the rest of the bubbles to animate to fill the gap. |
| */ |
| private boolean mBubbleDraggedOutEnough = false; |
| |
| /** End action to run when the lead bubble's expansion animation completes. */ |
| @Nullable private Runnable mLeadBubbleEndAction; |
| |
| /** |
| * Animates expanding the bubbles into a row along the top of the screen, optionally running an |
| * end action when the entire animation completes, and an end action when the lead bubble's |
| * animation ends. |
| */ |
| public void expandFromStack( |
| @Nullable Runnable after, @Nullable Runnable leadBubbleEndAction) { |
| mAnimatingCollapse = false; |
| mAnimatingExpand = true; |
| mAfterExpand = after; |
| mLeadBubbleEndAction = leadBubbleEndAction; |
| |
| startOrUpdatePathAnimation(true /* expanding */); |
| } |
| |
| /** |
| * Animates expanding the bubbles into a row along the top of the screen. |
| */ |
| public void expandFromStack(@Nullable Runnable after) { |
| expandFromStack(after, null /* leadBubbleEndAction */); |
| } |
| |
| /** Animate collapsing the bubbles back to their stacked position. */ |
| public void collapseBackToStack(PointF collapsePoint, Runnable after) { |
| mAnimatingExpand = false; |
| mAnimatingCollapse = true; |
| mAfterCollapse = after; |
| mCollapsePoint = collapsePoint; |
| |
| startOrUpdatePathAnimation(false /* expanding */); |
| } |
| |
| /** |
| * Update effective screen width based on current orientation. |
| * @param orientation Landscape or portrait. |
| * @param displaySize Updated display size. |
| */ |
| public void updateOrientation(int orientation, Point displaySize) { |
| mScreenOrientation = orientation; |
| mDisplaySize = displaySize; |
| if (mLayout != null) { |
| Resources res = mLayout.getContext().getResources(); |
| mBubblePaddingTop = res.getDimensionPixelSize(R.dimen.bubble_padding_top); |
| mStatusBarHeight = res.getDimensionPixelSize( |
| com.android.internal.R.dimen.status_bar_height); |
| } |
| } |
| |
| /** |
| * Animates the bubbles along a curved path, either to expand them along the top or collapse |
| * them back into a stack. |
| */ |
| private void startOrUpdatePathAnimation(boolean expanding) { |
| Runnable after; |
| |
| if (expanding) { |
| after = () -> { |
| mAnimatingExpand = false; |
| |
| if (mAfterExpand != null) { |
| mAfterExpand.run(); |
| } |
| |
| mAfterExpand = null; |
| }; |
| } else { |
| after = () -> { |
| mAnimatingCollapse = false; |
| |
| if (mAfterCollapse != null) { |
| mAfterCollapse.run(); |
| } |
| |
| mAfterCollapse = null; |
| }; |
| } |
| |
| // Animate each bubble individually, since each path will end in a different spot. |
| animationsForChildrenFromIndex(0, (index, animation) -> { |
| final View bubble = mLayout.getChildAt(index); |
| |
| // Start a path at the bubble's current position. |
| final Path path = new Path(); |
| path.moveTo(bubble.getTranslationX(), bubble.getTranslationY()); |
| |
| final float expandedY = getExpandedY(); |
| if (expanding) { |
| // If we're expanding, first draw a line from the bubble's current position to the |
| // top of the screen. |
| path.lineTo(bubble.getTranslationX(), expandedY); |
| |
| // Then, draw a line across the screen to the bubble's resting position. |
| path.lineTo(getBubbleLeft(index), expandedY); |
| } else { |
| final float sideMultiplier = |
| mLayout.isFirstChildXLeftOfCenter(mCollapsePoint.x) ? -1 : 1; |
| final float stackedX = mCollapsePoint.x + (sideMultiplier * index * mStackOffsetPx); |
| |
| // If we're collapsing, draw a line from the bubble's current position to the side |
| // of the screen where the bubble will be stacked. |
| path.lineTo(stackedX, expandedY); |
| |
| // Then, draw a line down to the stack position. |
| path.lineTo(stackedX, mCollapsePoint.y); |
| } |
| |
| // The lead bubble should be the bubble with the longest distance to travel when we're |
| // expanding, and the bubble with the shortest distance to travel when we're collapsing. |
| // During expansion from the left side, the last bubble has to travel to the far right |
| // side, so we have it lead and 'pull' the rest of the bubbles into place. From the |
| // right side, the first bubble is traveling to the top left, so it leads. During |
| // collapse to the left, the first bubble has the shortest travel time back to the stack |
| // position, so it leads (and vice versa). |
| final boolean firstBubbleLeads = |
| (expanding && !mLayout.isFirstChildXLeftOfCenter(bubble.getTranslationX())) |
| || (!expanding && mLayout.isFirstChildXLeftOfCenter(mCollapsePoint.x)); |
| final int startDelay = firstBubbleLeads |
| ? (index * 10) |
| : ((mLayout.getChildCount() - index) * 10); |
| |
| final boolean isLeadBubble = |
| (firstBubbleLeads && index == 0) |
| || (!firstBubbleLeads && index == mLayout.getChildCount() - 1); |
| |
| animation |
| .followAnimatedTargetAlongPath( |
| path, |
| EXPAND_COLLAPSE_TARGET_ANIM_DURATION /* targetAnimDuration */, |
| Interpolators.LINEAR /* targetAnimInterpolator */, |
| isLeadBubble ? mLeadBubbleEndAction : null /* endAction */, |
| () -> mLeadBubbleEndAction = null /* endAction */) |
| .withStartDelay(startDelay) |
| .withStiffness(EXPAND_COLLAPSE_ANIM_STIFFNESS); |
| }).startAll(after); |
| } |
| |
| /** Notifies the controller that the dragged-out bubble was unstuck from the magnetic target. */ |
| public void onUnstuckFromTarget() { |
| mSpringToTouchOnNextMotionEvent = true; |
| } |
| |
| /** |
| * Prepares the given bubble view to be dragged out, using the provided magnetic target and |
| * listener. |
| */ |
| public void prepareForBubbleDrag( |
| View bubble, |
| MagnetizedObject.MagneticTarget target, |
| MagnetizedObject.MagnetListener listener) { |
| mLayout.cancelAnimationsOnView(bubble); |
| |
| bubble.setTranslationZ(Short.MAX_VALUE); |
| mMagnetizedBubbleDraggingOut = new MagnetizedObject<View>( |
| mLayout.getContext(), bubble, |
| DynamicAnimation.TRANSLATION_X, DynamicAnimation.TRANSLATION_Y) { |
| @Override |
| public float getWidth(@NonNull View underlyingObject) { |
| return mBubbleSizePx; |
| } |
| |
| @Override |
| public float getHeight(@NonNull View underlyingObject) { |
| return mBubbleSizePx; |
| } |
| |
| @Override |
| public void getLocationOnScreen(@NonNull View underlyingObject, @NonNull int[] loc) { |
| loc[0] = (int) bubble.getTranslationX(); |
| loc[1] = (int) bubble.getTranslationY(); |
| } |
| }; |
| mMagnetizedBubbleDraggingOut.addTarget(target); |
| mMagnetizedBubbleDraggingOut.setMagnetListener(listener); |
| mMagnetizedBubbleDraggingOut.setHapticsEnabled(true); |
| mMagnetizedBubbleDraggingOut.setFlingToTargetMinVelocity(FLING_TO_DISMISS_MIN_VELOCITY); |
| } |
| |
| private void springBubbleTo(View bubble, float x, float y) { |
| animationForChild(bubble) |
| .translationX(x) |
| .translationY(y) |
| .withStiffness(SpringForce.STIFFNESS_HIGH) |
| .start(); |
| } |
| |
| /** |
| * Drags an individual bubble to the given coordinates. Bubbles to the right will animate to |
| * take its place once it's dragged out of the row of bubbles, and animate out of the way if the |
| * bubble is dragged back into the row. |
| */ |
| public void dragBubbleOut(View bubbleView, float x, float y) { |
| if (mSpringToTouchOnNextMotionEvent) { |
| springBubbleTo(mMagnetizedBubbleDraggingOut.getUnderlyingObject(), x, y); |
| mSpringToTouchOnNextMotionEvent = false; |
| mSpringingBubbleToTouch = true; |
| } else if (mSpringingBubbleToTouch) { |
| if (mLayout.arePropertiesAnimatingOnView( |
| bubbleView, DynamicAnimation.TRANSLATION_X, DynamicAnimation.TRANSLATION_Y)) { |
| springBubbleTo(mMagnetizedBubbleDraggingOut.getUnderlyingObject(), x, y); |
| } else { |
| mSpringingBubbleToTouch = false; |
| } |
| } |
| |
| if (!mSpringingBubbleToTouch && !mMagnetizedBubbleDraggingOut.getObjectStuckToTarget()) { |
| bubbleView.setTranslationX(x); |
| bubbleView.setTranslationY(y); |
| } |
| |
| final boolean draggedOutEnough = |
| y > getExpandedY() + mBubbleSizePx || y < getExpandedY() - mBubbleSizePx; |
| if (draggedOutEnough != mBubbleDraggedOutEnough) { |
| updateBubblePositions(); |
| mBubbleDraggedOutEnough = draggedOutEnough; |
| } |
| } |
| |
| /** Plays a dismiss animation on the dragged out bubble. */ |
| public void dismissDraggedOutBubble(View bubble, float translationYBy, Runnable after) { |
| if (bubble == null) { |
| return; |
| } |
| animationForChild(bubble) |
| .withStiffness(SpringForce.STIFFNESS_HIGH) |
| .scaleX(1.1f) |
| .scaleY(1.1f) |
| .translationY(bubble.getTranslationY() + translationYBy) |
| .alpha(0f, after) |
| .start(); |
| |
| updateBubblePositions(); |
| } |
| |
| @Nullable public View getDraggedOutBubble() { |
| return mMagnetizedBubbleDraggingOut == null |
| ? null |
| : mMagnetizedBubbleDraggingOut.getUnderlyingObject(); |
| } |
| |
| /** Returns the MagnetizedObject instance for the dragging-out bubble. */ |
| public MagnetizedObject<View> getMagnetizedBubbleDraggingOut() { |
| return mMagnetizedBubbleDraggingOut; |
| } |
| |
| /** |
| * Snaps a bubble back to its position within the bubble row, and animates the rest of the |
| * bubbles to accommodate it if it was previously dragged out past the threshold. |
| */ |
| public void snapBubbleBack(View bubbleView, float velX, float velY) { |
| final int index = mLayout.indexOfChild(bubbleView); |
| |
| animationForChildAtIndex(index) |
| .position(getBubbleLeft(index), getExpandedY()) |
| .withPositionStartVelocities(velX, velY) |
| .start(() -> bubbleView.setTranslationZ(0f) /* after */); |
| |
| mMagnetizedBubbleDraggingOut = null; |
| |
| updateBubblePositions(); |
| } |
| |
| /** Resets bubble drag out gesture flags. */ |
| public void onGestureFinished() { |
| mBubbleDraggedOutEnough = false; |
| mMagnetizedBubbleDraggingOut = null; |
| updateBubblePositions(); |
| } |
| |
| /** |
| * Animates the bubbles to {@link #getExpandedY()} position. Used in response to IME showing. |
| */ |
| public void updateYPosition(Runnable after) { |
| if (mLayout == null) return; |
| animationsForChildrenFromIndex( |
| 0, (i, anim) -> anim.translationY(getExpandedY())).startAll(after); |
| } |
| |
| /** The Y value of the row of expanded bubbles. */ |
| public float getExpandedY() { |
| if (mLayout == null || mLayout.getRootWindowInsets() == null) { |
| return 0; |
| } |
| final WindowInsets insets = mLayout.getRootWindowInsets(); |
| return mBubblePaddingTop + Math.max( |
| mStatusBarHeight, |
| insets.getDisplayCutout() != null |
| ? insets.getDisplayCutout().getSafeInsetTop() |
| : 0); |
| } |
| |
| /** Description of current animation controller state. */ |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.println("ExpandedAnimationController state:"); |
| pw.print(" isActive: "); pw.println(isActiveController()); |
| pw.print(" animatingExpand: "); pw.println(mAnimatingExpand); |
| pw.print(" animatingCollapse: "); pw.println(mAnimatingCollapse); |
| pw.print(" springingBubble: "); pw.println(mSpringingBubbleToTouch); |
| } |
| |
| @Override |
| void onActiveControllerForLayout(PhysicsAnimationLayout layout) { |
| final Resources res = layout.getResources(); |
| mStackOffsetPx = res.getDimensionPixelSize(R.dimen.bubble_stack_offset); |
| mBubblePaddingTop = res.getDimensionPixelSize(R.dimen.bubble_padding_top); |
| mBubbleSizePx = res.getDimensionPixelSize(R.dimen.individual_bubble_size); |
| mStatusBarHeight = |
| res.getDimensionPixelSize(com.android.internal.R.dimen.status_bar_height); |
| mBubblesMaxRendered = res.getInteger(R.integer.bubbles_max_rendered); |
| |
| // Includes overflow button. |
| float totalGapWidth = getWidthForDisplayingBubbles() - (mExpandedViewPadding * 2) |
| - (mBubblesMaxRendered + 1) * mBubbleSizePx; |
| mSpaceBetweenBubbles = totalGapWidth / mBubblesMaxRendered; |
| |
| // Ensure that all child views are at 1x scale, and visible, in case they were animating |
| // in. |
| mLayout.setVisibility(View.VISIBLE); |
| animationsForChildrenFromIndex(0 /* startIndex */, (index, animation) -> |
| animation.scaleX(1f).scaleY(1f).alpha(1f)).startAll(); |
| } |
| |
| @Override |
| Set<DynamicAnimation.ViewProperty> getAnimatedProperties() { |
| return Sets.newHashSet( |
| DynamicAnimation.TRANSLATION_X, |
| DynamicAnimation.TRANSLATION_Y, |
| DynamicAnimation.SCALE_X, |
| DynamicAnimation.SCALE_Y, |
| DynamicAnimation.ALPHA); |
| } |
| |
| @Override |
| int getNextAnimationInChain(DynamicAnimation.ViewProperty property, int index) { |
| return NONE; |
| } |
| |
| @Override |
| float getOffsetForChainedPropertyAnimation(DynamicAnimation.ViewProperty property) { |
| return 0; |
| } |
| |
| @Override |
| SpringForce getSpringForce(DynamicAnimation.ViewProperty property, View view) { |
| return new SpringForce() |
| .setDampingRatio(SpringForce.DAMPING_RATIO_LOW_BOUNCY) |
| .setStiffness(SpringForce.STIFFNESS_LOW); |
| } |
| |
| @Override |
| void onChildAdded(View child, int index) { |
| // If a bubble is added while the expand/collapse animations are playing, update the |
| // animation to include the new bubble. |
| if (mAnimatingExpand) { |
| startOrUpdatePathAnimation(true /* expanding */); |
| } else if (mAnimatingCollapse) { |
| startOrUpdatePathAnimation(false /* expanding */); |
| } else { |
| child.setTranslationX(getBubbleLeft(index)); |
| animationForChild(child) |
| .translationY( |
| getExpandedY() - mBubbleSizePx * ANIMATE_TRANSLATION_FACTOR, /* from */ |
| getExpandedY() /* to */) |
| .start(); |
| updateBubblePositions(); |
| } |
| } |
| |
| @Override |
| void onChildRemoved(View child, int index, Runnable finishRemoval) { |
| final PhysicsAnimationLayout.PhysicsPropertyAnimator animator = animationForChild(child); |
| |
| // If we're removing the dragged-out bubble, that means it got dismissed. |
| if (child.equals(getDraggedOutBubble())) { |
| mMagnetizedBubbleDraggingOut = null; |
| finishRemoval.run(); |
| } else { |
| animator.alpha(0f, finishRemoval /* endAction */) |
| .withStiffness(SpringForce.STIFFNESS_HIGH) |
| .withDampingRatio(SpringForce.DAMPING_RATIO_NO_BOUNCY) |
| .scaleX(1.1f) |
| .scaleY(1.1f) |
| .start(); |
| } |
| |
| // Animate all the other bubbles to their new positions sans this bubble. |
| updateBubblePositions(); |
| } |
| |
| @Override |
| void onChildReordered(View child, int oldIndex, int newIndex) { |
| updateBubblePositions(); |
| |
| // We expect reordering during collapse, since we'll put the last selected bubble on top. |
| // Update the collapse animation so they end up in the right stacked positions. |
| if (mAnimatingCollapse) { |
| startOrUpdatePathAnimation(false /* expanding */); |
| } |
| } |
| |
| private void updateBubblePositions() { |
| if (mAnimatingExpand || mAnimatingCollapse) { |
| return; |
| } |
| |
| for (int i = 0; i < mLayout.getChildCount(); i++) { |
| final View bubble = mLayout.getChildAt(i); |
| |
| // Don't animate the dragging out bubble, or it'll jump around while being dragged. It |
| // will be snapped to the correct X value after the drag (if it's not dismissed). |
| if (bubble.equals(getDraggedOutBubble())) { |
| return; |
| } |
| |
| animationForChild(bubble) |
| .translationX(getBubbleLeft(i)) |
| .start(); |
| } |
| } |
| |
| /** |
| * @param index Bubble index in row. |
| * @return Bubble left x from left edge of screen. |
| */ |
| public float getBubbleLeft(int index) { |
| final float bubbleFromRowLeft = index * (mBubbleSizePx + mSpaceBetweenBubbles); |
| return getRowLeft() + bubbleFromRowLeft; |
| } |
| |
| /** |
| * When expanded, the bubbles are centered in the screen. In portrait, all available space is |
| * used. In landscape we have too much space so the value is restricted. This method accounts |
| * for window decorations (nav bar, cutouts). |
| * |
| * @return the desired width to display the expanded bubbles in. |
| */ |
| public float getWidthForDisplayingBubbles() { |
| final float availableWidth = getAvailableScreenWidth(true /* includeStableInsets */); |
| if (mScreenOrientation == Configuration.ORIENTATION_LANDSCAPE) { |
| // display size y in landscape will be the smaller dimension of the screen |
| return Math.max(mDisplaySize.y, availableWidth * CENTER_BUBBLES_LANDSCAPE_PERCENT); |
| } else { |
| return availableWidth; |
| } |
| } |
| |
| /** |
| * Determines the available screen width without the cutout. |
| * |
| * @param subtractStableInsets Whether or not stable insets should also be removed from the |
| * returned width. |
| * @return the total screen width available accounting for cutouts and insets, |
| * iff {@param includeStableInsets} is true. |
| */ |
| private float getAvailableScreenWidth(boolean subtractStableInsets) { |
| float availableSize = mDisplaySize.x; |
| WindowInsets insets = mLayout != null ? mLayout.getRootWindowInsets() : null; |
| if (insets != null) { |
| int cutoutLeft = 0; |
| int cutoutRight = 0; |
| DisplayCutout cutout = insets.getDisplayCutout(); |
| if (cutout != null) { |
| cutoutLeft = cutout.getSafeInsetLeft(); |
| cutoutRight = cutout.getSafeInsetRight(); |
| } |
| final int stableLeft = subtractStableInsets ? insets.getStableInsetLeft() : 0; |
| final int stableRight = subtractStableInsets ? insets.getStableInsetRight() : 0; |
| availableSize -= Math.max(stableLeft, cutoutLeft); |
| availableSize -= Math.max(stableRight, cutoutRight); |
| } |
| return availableSize; |
| } |
| |
| private float getRowLeft() { |
| if (mLayout == null) { |
| return 0; |
| } |
| float rowWidth = (mLayout.getChildCount() * mBubbleSizePx) |
| + ((mLayout.getChildCount() - 1) * mSpaceBetweenBubbles); |
| |
| // This display size we're using includes the size of the insets, we want the true |
| // center of the display minus the notch here, which means we should include the |
| // stable insets (e.g. status bar, nav bar) in this calculation. |
| final float trueCenter = getAvailableScreenWidth(false /* subtractStableInsets */) / 2f; |
| return trueCenter - (rowWidth / 2f); |
| } |
| } |
