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Commit 5bf71b22 authored by Kevin's avatar Kevin
Browse files

Add clear all animation to Recents Go. 

Add clear all animation where task views fade out to the right and the
view fades to home.

Bug: 114136250
Test: Hit clear all
Change-Id: I5a3336da5b724ce19d9ef854efde0dd1f654941a
parent c885f9a1

go/quickstep/src/com/android/quickstep/TaskActionController.java

+0 −1
Original line number Diff line number Diff line
@@ -71,7 +71,6 @@ public final class TaskActionController { 
     * Clears all tasks and updates the model and view.

     */

    public void clearAllTasks() {

        // TODO: Play an animation so transition is more natural.

        int count = mAdapter.getItemCount();

        ActivityManagerWrapper.getInstance().removeAllRecentTasks();

        mLoader.clearAllTasks();

go/quickstep/src/com/android/quickstep/views/IconRecentsView.java

+79 −1
Original line number Diff line number Diff line
@@ -19,6 +19,10 @@ import static androidx.recyclerview.widget.LinearLayoutManager.VERTICAL; 


import android.animation.Animator;

import android.animation.AnimatorListenerAdapter;

import android.animation.AnimatorSet;

import android.animation.ObjectAnimator;

import android.animation.PropertyValuesHolder;

import android.animation.ValueAnimator;

import android.content.Context;

import android.util.AttributeSet;

import android.util.FloatProperty;
@@ -65,6 +69,10 @@ public final class IconRecentsView extends FrameLayout { 
                }

            };

    private static final long CROSSFADE_DURATION = 300;

    private static final long ITEM_ANIMATE_OUT_DURATION = 150;

    private static final long ITEM_ANIMATE_OUT_DELAY_BETWEEN = 40;

    private static final float ITEM_ANIMATE_OUT_TRANSLATION_X_RATIO = .25f;

    private static final long CLEAR_ALL_FADE_DELAY = 120;



    /**

     * A ratio representing the view's relative placement within its padded space. For example, 0
@@ -119,7 +127,7 @@ public final class IconRecentsView extends FrameLayout { 
            });



            View clearAllView = findViewById(R.id.clear_all_button);

            clearAllView.setOnClickListener(v -> mTaskActionController.clearAllTasks());

            clearAllView.setOnClickListener(v -> animateClearAllTasks());

        }

    }
@@ -194,6 +202,76 @@ public final class IconRecentsView extends FrameLayout { 
        return view.getThumbnailView();

    }



    /**

     * Clear all tasks and animate out.

     */

    private void animateClearAllTasks() {

        TaskItemView[] itemViews = getTaskViews();



        AnimatorSet clearAnim = new AnimatorSet();

        long currentDelay = 0;



        // Animate each item view to the right and fade out.

        for (TaskItemView itemView : itemViews) {

            PropertyValuesHolder transXproperty = PropertyValuesHolder.ofFloat(TRANSLATION_X,

                    0, itemView.getWidth() * ITEM_ANIMATE_OUT_TRANSLATION_X_RATIO);

            PropertyValuesHolder alphaProperty = PropertyValuesHolder.ofFloat(ALPHA, 1.0f, 0f);

            ObjectAnimator itemAnim = ObjectAnimator.ofPropertyValuesHolder(itemView,

                    transXproperty, alphaProperty);

            itemAnim.setDuration(ITEM_ANIMATE_OUT_DURATION);

            itemAnim.setStartDelay(currentDelay);



            clearAnim.play(itemAnim);

            currentDelay += ITEM_ANIMATE_OUT_DELAY_BETWEEN;

        }



        // Animate view fading and leave recents when faded enough.

        ValueAnimator contentAlpha = ValueAnimator.ofFloat(1.0f, 0f)

                .setDuration(CROSSFADE_DURATION);

        contentAlpha.setStartDelay(CLEAR_ALL_FADE_DELAY);

        contentAlpha.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

            private boolean mLeftRecents = false;



            @Override

            public void onAnimationUpdate(ValueAnimator valueAnimator) {

                mContentView.setAlpha((float) valueAnimator.getAnimatedValue());

                // Leave recents while fading out.

                if ((float) valueAnimator.getAnimatedValue() < .5f && !mLeftRecents) {

                    mActivityHelper.leaveRecents();

                    mLeftRecents = true;

                }

            }

        });



        clearAnim.play(contentAlpha);

        clearAnim.addListener(new AnimatorListenerAdapter() {

            @Override

            public void onAnimationEnd(Animator animation) {

                for (TaskItemView itemView : itemViews) {

                    itemView.setTranslationX(0);

                    itemView.setAlpha(1.0f);

                }

                mContentView.setVisibility(GONE);

                mTaskActionController.clearAllTasks();

            }

        });

        clearAnim.start();

    }



    /**

     * Get attached task item views ordered by most recent.

     *

     * @return array of attached task item views

     */

    private TaskItemView[] getTaskViews() {

        int taskCount = mTaskRecyclerView.getChildCount();

        TaskItemView[] itemViews = new TaskItemView[taskCount];

        for (int i = 0; i < taskCount; i ++) {

            itemViews[i] = (TaskItemView) mTaskRecyclerView.getChildAt(i);

        }

        return itemViews;

    }



    /**

     * Update the content view so that the appropriate view is shown based off the current list

     * of tasks.