Add physics motion to items in all apps.

Motion applied to:
- Icons
- Prediction icons
- Prediction divider

Bug: 38349031
Change-Id: I376e6e39080c8c80463a0ce8b104b05e4d576f17

5 files changed, 127 insertions, 5 deletions

diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index d9ee2c55a..a399d748a 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -20,6 +20,8 @@ import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.InsetDrawable;
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.text.Selection;
 import android.text.SpannableStringBuilder;
@@ -42,6 +44,7 @@ import com.android.launcher3.Launcher;
 import com.android.launcher3.PromiseAppInfo;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.SpringAnimationHandler;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragOptions;
@@ -63,7 +66,7 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
     private final Launcher mLauncher;
     private final AlphabeticalAppsList mApps;
     private final AllAppsGridAdapter mAdapter;
-    private final RecyclerView.LayoutManager mLayoutManager;
+    private final LinearLayoutManager mLayoutManager;
 
     private AllAppsRecyclerView mAppsRecyclerView;
     private SearchUiManager mSearchUiManager;
@@ -74,6 +77,8 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
     private int mNumAppsPerRow;
     private int mNumPredictedAppsPerRow;
 
+    private SpringAnimationHandler mSpringAnimationHandler;
+
     public AllAppsContainerView(Context context) {
         this(context, null);
     }
@@ -87,7 +92,9 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
 
         mLauncher = Launcher.getLauncher(context);
         mApps = new AlphabeticalAppsList(context);
-        mAdapter = new AllAppsGridAdapter(mLauncher, mApps, mLauncher, this);
+        mSpringAnimationHandler = new SpringAnimationHandler(SpringAnimationHandler.Y_DIRECTION);
+        mAdapter = new AllAppsGridAdapter(mLauncher, mApps, mLauncher, this,
+                mSpringAnimationHandler);
         mApps.setAdapter(mAdapter);
         mLayoutManager = mAdapter.getLayoutManager();
         mSearchQueryBuilder = new SpannableStringBuilder();
@@ -227,6 +234,10 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
         mAppsRecyclerView.setLayoutManager(mLayoutManager);
         mAppsRecyclerView.setAdapter(mAdapter);
         mAppsRecyclerView.setHasFixedSize(true);
+        if (FeatureFlags.LAUNCHER3_PHYSICS) {
+            mAppsRecyclerView.setSpringAnimationHandler(mSpringAnimationHandler);
+            mAppsRecyclerView.addOnScrollListener(new SpringMotionOnScrollListener());
+        }
 
         mSearchContainer = findViewById(R.id.search_container);
         mSearchUiManager = (SearchUiManager) mSearchContainer;
@@ -404,4 +415,36 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
             }
         }
     }
+
+    public SpringAnimationHandler getSpringAnimationHandler() {
+        return mSpringAnimationHandler;
+    }
+
+    public class SpringMotionOnScrollListener extends RecyclerView.OnScrollListener {
+
+        private int mScrollState = RecyclerView.SCROLL_STATE_IDLE;
+
+        @Override
+        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+            if (mScrollState == RecyclerView.SCROLL_STATE_DRAGGING) {
+                mSpringAnimationHandler.skipToEnd();
+                return;
+            }
+
+            int first = mLayoutManager.findFirstVisibleItemPosition();
+            int last = mLayoutManager.findLastVisibleItemPosition();
+
+            // We only show the spring animation when at the top or bottom, so we wait until the
+            // first or last row is visible to ensure that all animations run in sync.
+            if (first == 0 || last >= mAdapter.getItemCount() - mAdapter.getNumAppsPerRow()) {
+                mSpringAnimationHandler.animateToFinalPosition(0);
+            }
+        }
+
+        @Override
+        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
+            super.onScrollStateChanged(recyclerView, newState);
+            mScrollState = newState;
+        }
+    }
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
index cfd04e2e0..d3d23ca24 100644
--- a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
+++ b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
@@ -19,6 +19,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
 import android.graphics.Point;
+import android.support.animation.SpringAnimation;
 import android.support.v4.view.accessibility.AccessibilityEventCompat;
 import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
 import android.support.v4.view.accessibility.AccessibilityRecordCompat;
@@ -38,6 +39,8 @@ import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.allapps.AlphabeticalAppsList.AdapterItem;
+import com.android.launcher3.anim.SpringAnimationHandler;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.discovery.AppDiscoveryAppInfo;
 import com.android.launcher3.discovery.AppDiscoveryItemView;
 import com.android.launcher3.util.PackageManagerHelper;
@@ -80,6 +83,8 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
             | VIEW_TYPE_PREDICTION_ICON;
     public static final int VIEW_TYPE_MASK_CONTENT = VIEW_TYPE_MASK_ICON
             | VIEW_TYPE_DISCOVERY_ITEM;
+    public static final int VIEW_TYPE_MASK_HAS_SPRINGS = VIEW_TYPE_MASK_ICON
+            | VIEW_TYPE_PREDICTION_DIVIDER;
 
 
     public interface BindViewCallback {
@@ -90,6 +95,12 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
      * ViewHolder for each icon.
      */
     public static class ViewHolder extends RecyclerView.ViewHolder {
+
+        /**
+         * Springs used for items where isViewType(viewType, VIEW_TYPE_MASK_HAS_SPRINGS) is true.
+         */
+        private SpringAnimation spring;
+
         public ViewHolder(View v) {
             super(v);
         }
@@ -202,8 +213,11 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
     // The intent to send off to the market app, updated each time the search query changes.
     private Intent mMarketSearchIntent;
 
+    private SpringAnimationHandler mSpringAnimationHandler;
+
     public AllAppsGridAdapter(Launcher launcher, AlphabeticalAppsList apps, View.OnClickListener
-            iconClickListener, View.OnLongClickListener iconLongClickListener) {
+            iconClickListener, View.OnLongClickListener iconLongClickListener,
+            SpringAnimationHandler springAnimationHandler) {
         Resources res = launcher.getResources();
         mLauncher = launcher;
         mApps = apps;
@@ -214,6 +228,7 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
         mLayoutInflater = LayoutInflater.from(launcher);
         mIconClickListener = iconClickListener;
         mIconLongClickListener = iconLongClickListener;
+        mSpringAnimationHandler = springAnimationHandler;
     }
 
     public static boolean isDividerViewType(int viewType) {
@@ -236,6 +251,10 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
         mGridLayoutMgr.setSpanCount(appsPerRow);
     }
 
+    public int getNumAppsPerRow() {
+        return mAppsPerRow;
+    }
+
     public void setIconFocusListener(OnFocusChangeListener focusListener) {
         mIconFocusListener = focusListener;
     }
@@ -327,7 +346,6 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
                 AppInfo info = mApps.getAdapterItems().get(position).appInfo;
                 BubbleTextView icon = (BubbleTextView) holder.itemView;
                 icon.applyFromApplicationInfo(info);
-                icon.setAccessibilityDelegate(mLauncher.getAccessibilityDelegate());
                 break;
             case VIEW_TYPE_DISCOVERY_ITEM:
                 AppDiscoveryAppInfo appDiscoveryAppInfo = (AppDiscoveryAppInfo)
@@ -365,6 +383,23 @@ public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.
     }
 
     @Override
+    public void onViewAttachedToWindow(ViewHolder holder) {
+        int type = holder.getItemViewType();
+        if (FeatureFlags.LAUNCHER3_PHYSICS && isViewType(type, VIEW_TYPE_MASK_HAS_SPRINGS)) {
+            holder.spring = mSpringAnimationHandler.add(holder.itemView,
+                    holder.getAdapterPosition(), mApps, mAppsPerRow, holder.spring);
+        }
+    }
+
+    @Override
+    public void onViewDetachedFromWindow(ViewHolder holder) {
+        int type = holder.getItemViewType();
+        if (FeatureFlags.LAUNCHER3_PHYSICS && isViewType(type, VIEW_TYPE_MASK_HAS_SPRINGS)) {
+            holder.spring = mSpringAnimationHandler.remove(holder.spring);
+        }
+    }
+
+    @Override
     public boolean onFailedToRecycleView(ViewHolder holder) {
         // Always recycle and we will reset the view when it is bound
         return true;
diff --git a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
index 16b2bd1fc..d76abccd3 100644
--- a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
@@ -28,8 +28,8 @@ import android.view.View;
 import com.android.launcher3.BaseRecyclerView;
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
+import com.android.launcher3.anim.SpringAnimationHandler;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.graphics.DrawableFactory;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
@@ -53,6 +53,8 @@ public class AllAppsRecyclerView extends BaseRecyclerView {
     private AllAppsBackgroundDrawable mEmptySearchBackground;
     private int mEmptySearchBackgroundTopOffset;
 
+    private SpringAnimationHandler mSpringAnimationHandler;
+
     public AllAppsRecyclerView(Context context) {
         this(context, null);
     }
@@ -75,6 +77,18 @@ public class AllAppsRecyclerView extends BaseRecyclerView {
                 R.dimen.all_apps_empty_search_bg_top_offset);
     }
 
+    public void setSpringAnimationHandler(SpringAnimationHandler springAnimationHandler) {
+        mSpringAnimationHandler = springAnimationHandler;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent e) {
+        if (FeatureFlags.LAUNCHER3_PHYSICS && mSpringAnimationHandler != null) {
+            mSpringAnimationHandler.addMovement(e);
+        }
+        return super.onTouchEvent(e);
+    }
+
     /**
      * Sets the list of apps in this view, used to determine the fastscroll position.
      */
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index 7c6ff5120..dd0d23810 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -22,6 +22,7 @@ import com.android.launcher3.LauncherAnimUtils;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace;
+import com.android.launcher3.anim.SpringAnimationHandler;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dynamicui.ExtractedColors;
 import com.android.launcher3.graphics.GradientView;
@@ -99,6 +100,8 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
     private GradientView mGradientView;
     private ScrimView mScrimView;
 
+    private SpringAnimationHandler mSpringAnimationHandler;
+
     public AllAppsTransitionController(Launcher l) {
         mLauncher = l;
         mDetector = new VerticalPullDetector(l);
@@ -161,6 +164,9 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
 
     @Override
     public boolean onControllerTouchEvent(MotionEvent ev) {
+        if (hasSpringAnimationHandler()) {
+            mSpringAnimationHandler.addMovement(ev);
+        }
         return mDetector.onTouchEvent(ev);
     }
 
@@ -179,6 +185,9 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
         mCurrentAnimation = LauncherAnimUtils.createAnimatorSet();
         mShiftStart = mAppsView.getTranslationY();
         preparePull(start);
+        if (hasSpringAnimationHandler()) {
+            mSpringAnimationHandler.skipToEnd();
+        }
     }
 
     @Override
@@ -214,6 +223,9 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
                 mLauncher.showAppsView(true /* animated */,
                         false /* updatePredictedApps */,
                         false /* focusSearchBar */);
+                if (hasSpringAnimationHandler()) {
+                    mSpringAnimationHandler.animateToFinalPosition(0);
+                }
             } else {
                 calculateDuration(velocity, Math.abs(mShiftRange - mAppsView.getTranslationY()));
                 mLauncher.showWorkspace(true);
@@ -498,6 +510,9 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
 
     public void finishPullUp() {
         mHotseat.setVisibility(View.INVISIBLE);
+        if (hasSpringAnimationHandler()) {
+            mSpringAnimationHandler.reset();
+        }
         setProgress(0f);
     }
 
@@ -506,6 +521,9 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
         mHotseat.setBackgroundTransparent(false /* transparent */);
         mHotseat.setVisibility(View.VISIBLE);
         mAppsView.reset();
+        if (hasSpringAnimationHandler()) {
+            mSpringAnimationHandler.reset();
+        }
         setProgress(1f);
     }
 
@@ -537,6 +555,11 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
         mCaretController = new AllAppsCaretController(
                 mWorkspace.getPageIndicator().getCaretDrawable(), mLauncher);
         mAppsView.getSearchUiManager().addOnScrollRangeChangeListener(this);
+        mSpringAnimationHandler = mAppsView.getSpringAnimationHandler();
+    }
+
+    private boolean hasSpringAnimationHandler() {
+        return FeatureFlags.LAUNCHER3_PHYSICS && mSpringAnimationHandler != null;
     }
 
     @Override
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index 047441985..b84c6276a 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -228,6 +228,13 @@ public class AlphabeticalAppsList {
     }
 
     /**
+     * Returns the predicted apps.
+     */
+    public List<AppInfo> getPredictedApps() {
+        return mPredictedApps;
+    }
+
+    /**
      * Returns fast scroller sections of all the current filtered applications.
      */
     public List<FastScrollSectionInfo> getFastScrollerSections() {