Merge "Add TileAdapterDelegate" into rvc-qpr-dev

5 files changed, 568 insertions, 93 deletions

diff --git a/packages/SystemUI/res/values/ids.xml b/packages/SystemUI/res/values/ids.xml
index a56f6f56836a..b8e8db5ecf50 100644
--- a/packages/SystemUI/res/values/ids.xml
+++ b/packages/SystemUI/res/values/ids.xml
@@ -177,6 +177,9 @@
     <item type="id" name="accessibility_action_controls_move_before" />
     <item type="id" name="accessibility_action_controls_move_after" />
 
+    <item type="id" name="accessibility_action_qs_move_to_position" />
+    <item type="id" name="accessibility_action_qs_add_to_position" />
+
     <!-- Accessibility actions for PIP -->
     <item type="id" name="action_pip_resize" />
 </resources>
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 38501eb8da3d..77ce39fe9953 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -2267,23 +2267,26 @@
     <!-- Accessibility action for moving docked stack divider to make the bottom screen full screen [CHAR LIMIT=NONE] -->
     <string name="accessibility_action_divider_bottom_full">Bottom full screen</string>
 
-    <!-- Accessibility description of a QS tile while editing positions [CHAR LIMIT=NONE] -->
-    <string name="accessibility_qs_edit_tile_label">Position <xliff:g id="position" example="2">%1$d</xliff:g>, <xliff:g id="tile_name" example="Wi-Fi">%2$s</xliff:g>. Double tap to edit.</string>
+    <!-- Accessibility description of action to remove QS tile on click. It will read as "Double-tap to remove tile" in screen readers [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_remove_tile_action">remove tile</string>
 
-    <!-- Accessibility description of a QS tile while editing positions [CHAR LIMIT=NONE] -->
-    <string name="accessibility_qs_edit_add_tile_label"><xliff:g id="tile_name" example="Wi-Fi">%1$s</xliff:g>. Double tap to add.</string>
+    <!-- Accessibility action of action to add QS tile to end. It will read as "Double-tap to add tile to end" in screen readers [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_tile_add_action">add tile to end</string>
 
-    <!-- Accessibility description of option to move QS tile [CHAR LIMIT=NONE] -->
-    <string name="accessibility_qs_edit_move_tile">Move <xliff:g id="tile_name" example="Wi-Fi">%1$s</xliff:g></string>
+    <!-- Accessibility action for context menu to move QS tile [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_tile_start_move">Move tile</string>
 
-    <!-- Accessibility description of option to remove QS tile [CHAR LIMIT=NONE] -->
-    <string name="accessibility_qs_edit_remove_tile">Remove <xliff:g id="tile_name" example="Wi-Fi">%1$s</xliff:g></string>
+    <!-- Accessibility action for context menu to add QS tile [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_tile_start_add">Add tile</string>
 
-    <!-- Accessibility action when QS tile is to be added [CHAR LIMIT=NONE] -->
-    <string name="accessibility_qs_edit_tile_add">Add <xliff:g id="tile_name" example="Wi-Fi">%1$s</xliff:g> to position <xliff:g id="position" example="5">%2$d</xliff:g></string>
+    <!-- Accessibility description when QS tile is to be moved, indicating the destination position [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_tile_move_to_position">Move to <xliff:g id="position" example="5">%1$d</xliff:g></string>
 
-    <!-- Accessibility action when QS tile is to be moved [CHAR LIMIT=NONE] -->
-    <string name="accessibility_qs_edit_tile_move">Move <xliff:g id="tile_name" example="Wi-Fi">%1$s</xliff:g> to position <xliff:g id="position" example="5">%2$d</xliff:g></string>
+    <!-- Accessibility description when QS tile is to be added, indicating the destination position [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_tile_add_to_position">Add to position <xliff:g id="position" example="5">%1$d</xliff:g></string>
+
+    <!-- Accessibility description indicating the currently selected tile's position. Only used for tiles that are currently in use [CHAR LIMIT=NONE] -->
+    <string name="accessibility_qs_edit_position">Position <xliff:g id="position" example="5">%1$d</xliff:g></string>
 
     <!-- Accessibility label for window when QS editing is happening [CHAR LIMIT=NONE] -->
     <string name="accessibility_desc_quick_settings_edit">Quick settings editor.</string>
diff --git a/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapter.java b/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapter.java
index e738cec4962a..bffeb3ec3c70 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapter.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapter.java
@@ -14,11 +14,8 @@
 
 package com.android.systemui.qs.customize;
 
-import android.app.AlertDialog;
-import android.app.AlertDialog.Builder;
 import android.content.ComponentName;
 import android.content.Context;
-import android.content.DialogInterface;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.drawable.Drawable;
@@ -28,10 +25,11 @@ import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLayoutChangeListener;
 import android.view.ViewGroup;
-import android.view.accessibility.AccessibilityManager;
 import android.widget.FrameLayout;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.core.view.AccessibilityDelegateCompat;
 import androidx.core.view.ViewCompat;
 import androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup;
 import androidx.recyclerview.widget.ItemTouchHelper;
@@ -49,7 +47,6 @@ import com.android.systemui.qs.customize.TileQueryHelper.TileInfo;
 import com.android.systemui.qs.customize.TileQueryHelper.TileStateListener;
 import com.android.systemui.qs.external.CustomTile;
 import com.android.systemui.qs.tileimpl.QSIconViewImpl;
-import com.android.systemui.statusbar.phone.SystemUIDialog;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -78,10 +75,10 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
     private final List<TileInfo> mTiles = new ArrayList<>();
     private final ItemTouchHelper mItemTouchHelper;
     private final ItemDecoration mDecoration;
-    private final AccessibilityManager mAccessibilityManager;
     private final int mMinNumTiles;
     private int mEditIndex;
     private int mTileDividerIndex;
+    private int mFocusIndex;
     private boolean mNeedsFocus;
     private List<String> mCurrentSpecs;
     private List<TileInfo> mOtherTiles;
@@ -90,17 +87,28 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
     private Holder mCurrentDrag;
     private int mAccessibilityAction = ACTION_NONE;
     private int mAccessibilityFromIndex;
-    private CharSequence mAccessibilityFromLabel;
     private QSTileHost mHost;
     private final UiEventLogger mUiEventLogger;
+    private final AccessibilityDelegateCompat mAccessibilityDelegate;
+    private RecyclerView mRecyclerView;
 
     public TileAdapter(Context context, UiEventLogger uiEventLogger) {
         mContext = context;
         mUiEventLogger = uiEventLogger;
-        mAccessibilityManager = context.getSystemService(AccessibilityManager.class);
         mItemTouchHelper = new ItemTouchHelper(mCallbacks);
         mDecoration = new TileItemDecoration(context);
         mMinNumTiles = context.getResources().getInteger(R.integer.quick_settings_min_num_tiles);
+        mAccessibilityDelegate = new TileAdapterDelegate();
+    }
+
+    @Override
+    public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
+        mRecyclerView = recyclerView;
+    }
+
+    @Override
+    public void onDetachedFromRecyclerView(@NonNull RecyclerView recyclerView) {
+        mRecyclerView = null;
     }
 
     public void setHost(QSTileHost host) {
@@ -130,7 +138,6 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
             // Remove blank tile from last spot
             mTiles.remove(--mEditIndex);
             // Update the tile divider position
-            mTileDividerIndex--;
             notifyDataSetChanged();
         }
         mAccessibilityAction = ACTION_NONE;
@@ -241,14 +248,12 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
     }
 
     private void setSelectableForHeaders(View view) {
-        if (mAccessibilityManager.isTouchExplorationEnabled()) {
-            final boolean selectable = mAccessibilityAction == ACTION_NONE;
-            view.setFocusable(selectable);
-            view.setImportantForAccessibility(selectable
-                    ? View.IMPORTANT_FOR_ACCESSIBILITY_YES
-                    : View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
-            view.setFocusableInTouchMode(selectable);
-        }
+        final boolean selectable = mAccessibilityAction == ACTION_NONE;
+        view.setFocusable(selectable);
+        view.setImportantForAccessibility(selectable
+                ? View.IMPORTANT_FOR_ACCESSIBILITY_YES
+                : View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
+        view.setFocusableInTouchMode(selectable);
     }
 
     @Override
@@ -285,12 +290,11 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
             holder.mTileView.setVisibility(View.VISIBLE);
             holder.mTileView.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
             holder.mTileView.setContentDescription(mContext.getString(
-                    R.string.accessibility_qs_edit_tile_add, mAccessibilityFromLabel,
-                    position));
+                    R.string.accessibility_qs_edit_tile_add_to_position, position));
             holder.mTileView.setOnClickListener(new OnClickListener() {
                 @Override
                 public void onClick(View v) {
-                    selectPosition(holder.getAdapterPosition(), v);
+                    selectPosition(holder.getLayoutPosition());
                 }
             });
             focusOnHolder(holder);
@@ -299,54 +303,49 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
 
         TileInfo info = mTiles.get(position);
 
-        if (position > mEditIndex) {
-            info.state.contentDescription = mContext.getString(
-                    R.string.accessibility_qs_edit_add_tile_label, info.state.label);
-        } else if (mAccessibilityAction == ACTION_ADD) {
+        final boolean selectable = 0 < position && position < mEditIndex;
+        if (selectable && mAccessibilityAction == ACTION_ADD) {
             info.state.contentDescription = mContext.getString(
-                    R.string.accessibility_qs_edit_tile_add, mAccessibilityFromLabel, position);
-        } else if (mAccessibilityAction == ACTION_MOVE) {
+                    R.string.accessibility_qs_edit_tile_add_to_position, position);
+        } else if (selectable && mAccessibilityAction == ACTION_MOVE) {
             info.state.contentDescription = mContext.getString(
-                    R.string.accessibility_qs_edit_tile_move, mAccessibilityFromLabel, position);
+                    R.string.accessibility_qs_edit_tile_move_to_position, position);
         } else {
-            info.state.contentDescription = mContext.getString(
-                    R.string.accessibility_qs_edit_tile_label, position, info.state.label);
+            info.state.contentDescription = info.state.label;
         }
+        info.state.expandedAccessibilityClassName = "";
+
         holder.mTileView.handleStateChanged(info.state);
         holder.mTileView.setShowAppLabel(position > mEditIndex && !info.isSystem);
+        holder.mTileView.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
+        holder.mTileView.setClickable(true);
+        holder.mTileView.setOnClickListener(null);
+        holder.mTileView.setFocusable(true);
+        holder.mTileView.setFocusableInTouchMode(true);
 
-        if (mAccessibilityManager.isTouchExplorationEnabled()) {
-            final boolean selectable = mAccessibilityAction == ACTION_NONE || position < mEditIndex;
+        if (mAccessibilityAction != ACTION_NONE) {
             holder.mTileView.setClickable(selectable);
             holder.mTileView.setFocusable(selectable);
+            holder.mTileView.setFocusableInTouchMode(selectable);
             holder.mTileView.setImportantForAccessibility(selectable
                     ? View.IMPORTANT_FOR_ACCESSIBILITY_YES
                     : View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
-            holder.mTileView.setFocusableInTouchMode(selectable);
             if (selectable) {
                 holder.mTileView.setOnClickListener(new OnClickListener() {
                     @Override
                     public void onClick(View v) {
-                        int position = holder.getAdapterPosition();
+                        int position = holder.getLayoutPosition();
                         if (position == RecyclerView.NO_POSITION) return;
                         if (mAccessibilityAction != ACTION_NONE) {
-                            selectPosition(position, v);
-                        } else {
-                            if (position < mEditIndex && canRemoveTiles()) {
-                                showAccessibilityDialog(position, v);
-                            } else if (position < mEditIndex && !canRemoveTiles()) {
-                                startAccessibleMove(position);
-                            } else {
-                                startAccessibleAdd(position);
-                            }
+                            selectPosition(position);
                         }
                     }
                 });
-                if (position == mAccessibilityFromIndex) {
-                    focusOnHolder(holder);
-                }
             }
         }
+        if (position == mFocusIndex) {
+            focusOnHolder(holder);
+        }
     }
 
     private void focusOnHolder(Holder holder) {
@@ -360,9 +359,13 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
                         int oldLeft, int oldTop, int oldRight, int oldBottom) {
                     holder.mTileView.removeOnLayoutChangeListener(this);
                     holder.mTileView.requestFocus();
+                    if (mAccessibilityAction == ACTION_NONE) {
+                        holder.mTileView.clearFocus();
+                    }
                 }
             });
             mNeedsFocus = false;
+            mFocusIndex = RecyclerView.NO_POSITION;
         }
     }
 
@@ -370,72 +373,77 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
         return mCurrentSpecs.size() > mMinNumTiles;
     }
 
-    private void selectPosition(int position, View v) {
+    private void selectPosition(int position) {
         if (mAccessibilityAction == ACTION_ADD) {
             // Remove the placeholder.
             mTiles.remove(mEditIndex--);
-            notifyItemRemoved(mEditIndex);
         }
         mAccessibilityAction = ACTION_NONE;
-        move(mAccessibilityFromIndex, position, v);
+        move(mAccessibilityFromIndex, position, false);
+        mFocusIndex = position;
+        mNeedsFocus = true;
         notifyDataSetChanged();
     }
 
-    private void showAccessibilityDialog(final int position, final View v) {
-        final TileInfo info = mTiles.get(position);
-        CharSequence[] options = new CharSequence[] {
-                mContext.getString(R.string.accessibility_qs_edit_move_tile, info.state.label),
-                mContext.getString(R.string.accessibility_qs_edit_remove_tile, info.state.label),
-        };
-        AlertDialog dialog = new Builder(mContext)
-                .setItems(options, new DialogInterface.OnClickListener() {
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        if (which == 0) {
-                            startAccessibleMove(position);
-                        } else {
-                            move(position, info.isSystem ? mEditIndex : mTileDividerIndex, v);
-                            notifyItemChanged(mTileDividerIndex);
-                            notifyDataSetChanged();
-                        }
-                    }
-                }).setNegativeButton(android.R.string.cancel, null)
-                .create();
-        SystemUIDialog.setShowForAllUsers(dialog, true);
-        SystemUIDialog.applyFlags(dialog);
-        dialog.show();
-    }
-
     private void startAccessibleAdd(int position) {
         mAccessibilityFromIndex = position;
-        mAccessibilityFromLabel = mTiles.get(position).state.label;
         mAccessibilityAction = ACTION_ADD;
         // Add placeholder for last slot.
         mTiles.add(mEditIndex++, null);
         // Update the tile divider position
         mTileDividerIndex++;
+        mFocusIndex = mEditIndex - 1;
         mNeedsFocus = true;
+        if (mRecyclerView != null) {
+            mRecyclerView.post(() -> mRecyclerView.smoothScrollToPosition(mFocusIndex));
+        }
         notifyDataSetChanged();
     }
 
     private void startAccessibleMove(int position) {
         mAccessibilityFromIndex = position;
-        mAccessibilityFromLabel = mTiles.get(position).state.label;
         mAccessibilityAction = ACTION_MOVE;
+        mFocusIndex = position;
         mNeedsFocus = true;
         notifyDataSetChanged();
     }
 
+    private boolean canRemoveFromPosition(int position) {
+        return canRemoveTiles() && isCurrentTile(position);
+    }
+
+    private boolean isCurrentTile(int position) {
+        return position < mEditIndex;
+    }
+
+    private boolean canAddFromPosition(int position) {
+        return position > mEditIndex;
+    }
+
+    private void addFromPosition(int position) {
+        if (!canAddFromPosition(position)) return;
+        move(position, mEditIndex);
+    }
+
+    private void removeFromPosition(int position) {
+        if (!canRemoveFromPosition(position)) return;
+        TileInfo info = mTiles.get(position);
+        move(position, info.isSystem ? mEditIndex : mTileDividerIndex);
+    }
+
     public SpanSizeLookup getSizeLookup() {
         return mSizeLookup;
     }
 
-    private boolean move(int from, int to, View v) {
+    private boolean move(int from, int to) {
+        return move(from, to, true);
+    }
+
+    private boolean move(int from, int to, boolean notify) {
         if (to == from) {
             return true;
         }
-        CharSequence fromLabel = mTiles.get(from).state.label;
-        move(from, to, mTiles);
+        move(from, to, mTiles, notify);
         updateDividerLocations();
         if (to >= mEditIndex) {
             mUiEventLogger.log(QSEditEvent.QS_EDIT_REMOVE, 0, strip(mTiles.get(to)));
@@ -477,9 +485,11 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
         return spec;
     }
 
-    private <T> void move(int from, int to, List<T> list) {
+    private <T> void move(int from, int to, List<T> list, boolean notify) {
         list.add(to, list.remove(from));
-        notifyItemMoved(from, to);
+        if (notify) {
+            notifyItemMoved(from, to);
+        }
     }
 
     public class Holder extends ViewHolder {
@@ -491,6 +501,8 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
                 mTileView = (CustomizeTileView) ((FrameLayout) itemView).getChildAt(0);
                 mTileView.setBackground(null);
                 mTileView.getIcon().disableAnimation();
+                mTileView.setTag(this);
+                ViewCompat.setAccessibilityDelegate(mTileView, mAccessibilityDelegate);
             }
         }
 
@@ -527,6 +539,46 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
                     .setDuration(DRAG_LENGTH)
                     .alpha(.6f);
         }
+
+        boolean canRemove() {
+            return canRemoveFromPosition(getLayoutPosition());
+        }
+
+        boolean canAdd() {
+            return canAddFromPosition(getLayoutPosition());
+        }
+
+        void toggleState() {
+            if (canAdd()) {
+                add();
+            } else {
+                remove();
+            }
+        }
+
+        private void add() {
+            addFromPosition(getLayoutPosition());
+        }
+
+        private void remove() {
+            removeFromPosition(getLayoutPosition());
+        }
+
+        boolean isCurrentTile() {
+            return TileAdapter.this.isCurrentTile(getLayoutPosition());
+        }
+
+        void startAccessibleAdd() {
+            TileAdapter.this.startAccessibleAdd(getLayoutPosition());
+        }
+
+        void startAccessibleMove() {
+            TileAdapter.this.startAccessibleMove(getLayoutPosition());
+        }
+
+        boolean canTakeAccessibleAction() {
+            return mAccessibilityAction == ACTION_NONE;
+        }
     }
 
     private final SpanSizeLookup mSizeLookup = new SpanSizeLookup() {
@@ -648,7 +700,7 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
                     to == 0 || to == RecyclerView.NO_POSITION) {
                 return false;
             }
-            return move(from, to, target.itemView);
+            return move(from, to);
         }
 
         @Override
diff --git a/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapterDelegate.java b/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapterDelegate.java
new file mode 100644
index 000000000000..1e426adac0b8
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapterDelegate.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2020 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.qs.customize;
+
+import android.os.Bundle;
+import android.view.View;
+import android.view.accessibility.AccessibilityNodeInfo;
+
+import androidx.core.view.AccessibilityDelegateCompat;
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
+
+import com.android.systemui.R;
+
+import java.util.List;
+
+/**
+ * Accessibility delegate for {@link TileAdapter} views.
+ *
+ * This delegate will populate the accessibility info with the proper actions that can be taken for
+ * the different tiles:
+ * <ul>
+ *   <li>Add to end if the tile is not a current tile (by double tap).</li>
+ *   <li>Add to a given position (by context menu). This will let the user select a position.</li>
+ *   <li>Remove, if the tile is a current tile (by double tap).</li>
+ *   <li>Move to a given position (by context menu). This will let the user select a position.</li>
+ * </ul>
+ *
+ * This only handles generating the associated actions. The logic for selecting positions is handled
+ * by {@link TileAdapter}.
+ *
+ * In order for the delegate to work properly, the asociated {@link TileAdapter.Holder} should be
+ * passed along with the view using {@link View#setTag}.
+ */
+class TileAdapterDelegate extends AccessibilityDelegateCompat {
+
+    private static final int MOVE_TO_POSITION_ID = R.id.accessibility_action_qs_move_to_position;
+    private static final int ADD_TO_POSITION_ID = R.id.accessibility_action_qs_add_to_position;
+
+    private TileAdapter.Holder getHolder(View view) {
+        return (TileAdapter.Holder) view.getTag();
+    }
+
+    @Override
+    public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
+        super.onInitializeAccessibilityNodeInfo(host, info);
+        TileAdapter.Holder holder = getHolder(host);
+        info.setCollectionItemInfo(null);
+        info.setStateDescription("");
+        if (holder == null || !holder.canTakeAccessibleAction()) {
+            // If there's not a holder (not a regular Tile) or an action cannot be taken
+            // because we are in the middle of an accessibility action, don't create a special node.
+            return;
+        }
+
+        addClickAction(host, info, holder);
+        maybeAddActionAddToPosition(host, info, holder);
+        maybeAddActionMoveToPosition(host, info, holder);
+
+        if (holder.isCurrentTile()) {
+            info.setStateDescription(host.getContext().getString(
+                    R.string.accessibility_qs_edit_position, holder.getLayoutPosition()));
+        }
+    }
+
+    @Override
+    public boolean performAccessibilityAction(View host, int action, Bundle args) {
+        TileAdapter.Holder holder = getHolder(host);
+
+        if (holder == null || !holder.canTakeAccessibleAction()) {
+            // If there's not a holder (not a regular Tile) or an action cannot be taken
+            // because we are in the middle of an accessibility action, perform the default action.
+            return super.performAccessibilityAction(host, action, args);
+        }
+        if (action == AccessibilityNodeInfo.ACTION_CLICK) {
+            holder.toggleState();
+            return true;
+        } else if (action == MOVE_TO_POSITION_ID) {
+            holder.startAccessibleMove();
+            return true;
+        } else if (action == ADD_TO_POSITION_ID) {
+            holder.startAccessibleAdd();
+            return true;
+        } else {
+            return super.performAccessibilityAction(host, action, args);
+        }
+    }
+
+    private void addClickAction(
+            View host, AccessibilityNodeInfoCompat info, TileAdapter.Holder holder) {
+        String clickActionString;
+        if (holder.canAdd()) {
+            clickActionString = host.getContext().getString(
+                    R.string.accessibility_qs_edit_tile_add_action);
+        } else if (holder.canRemove()) {
+            clickActionString = host.getContext().getString(
+                    R.string.accessibility_qs_edit_remove_tile_action);
+        } else {
+            // Remove the default click action if tile can't either be added or removed (for example
+            // if there's the minimum number of tiles)
+            List<AccessibilityNodeInfoCompat.AccessibilityActionCompat> listOfActions =
+                    info.getActionList(); // This is a copy
+            int numActions = listOfActions.size();
+            for (int i = 0; i < numActions; i++) {
+                if (listOfActions.get(i).getId() == AccessibilityNodeInfo.ACTION_CLICK) {
+                    info.removeAction(listOfActions.get(i));
+                }
+            }
+            return;
+        }
+
+        AccessibilityNodeInfoCompat.AccessibilityActionCompat action =
+                new AccessibilityNodeInfoCompat.AccessibilityActionCompat(
+                        AccessibilityNodeInfo.ACTION_CLICK, clickActionString);
+        info.addAction(action);
+    }
+
+    private void maybeAddActionMoveToPosition(
+            View host, AccessibilityNodeInfoCompat info, TileAdapter.Holder holder) {
+        if (holder.isCurrentTile()) {
+            AccessibilityNodeInfoCompat.AccessibilityActionCompat action =
+                    new AccessibilityNodeInfoCompat.AccessibilityActionCompat(MOVE_TO_POSITION_ID,
+                            host.getContext().getString(
+                                    R.string.accessibility_qs_edit_tile_start_move));
+            info.addAction(action);
+        }
+    }
+
+    private void maybeAddActionAddToPosition(
+            View host, AccessibilityNodeInfoCompat info, TileAdapter.Holder holder) {
+        if (holder.canAdd()) {
+            AccessibilityNodeInfoCompat.AccessibilityActionCompat action =
+                    new AccessibilityNodeInfoCompat.AccessibilityActionCompat(ADD_TO_POSITION_ID,
+                            host.getContext().getString(
+                                    R.string.accessibility_qs_edit_tile_start_add));
+            info.addAction(action);
+        }
+    }
+}
diff --git a/packages/SystemUI/tests/src/com/android/systemui/qs/customize/TileAdapterDelegateTest.java b/packages/SystemUI/tests/src/com/android/systemui/qs/customize/TileAdapterDelegateTest.java
new file mode 100644
index 000000000000..a5dead0f3258
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/qs/customize/TileAdapterDelegateTest.java
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2020 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.qs.customize;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.os.Bundle;
+import android.testing.AndroidTestingRunner;
+import android.view.View;
+import android.view.accessibility.AccessibilityNodeInfo;
+
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
+import androidx.test.filters.SmallTest;
+
+import com.android.systemui.R;
+import com.android.systemui.SysuiTestCase;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@SmallTest
+@RunWith(AndroidTestingRunner.class)
+public class TileAdapterDelegateTest extends SysuiTestCase {
+
+    private static final int MOVE_TO_POSITION_ID = R.id.accessibility_action_qs_move_to_position;
+    private static final int ADD_TO_POSITION_ID = R.id.accessibility_action_qs_add_to_position;
+    private static final int POSITION_STRING_ID = R.string.accessibility_qs_edit_position;
+
+    @Mock
+    private TileAdapter.Holder mHolder;
+
+    private AccessibilityNodeInfoCompat mInfo;
+    private TileAdapterDelegate mDelegate;
+    private View mView;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mView = new View(mContext);
+        mDelegate = new TileAdapterDelegate();
+        mInfo = AccessibilityNodeInfoCompat.obtain();
+    }
+
+    @Test
+    public void testInfoNoSpecialActionsWhenNoHolder() {
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        for (AccessibilityNodeInfoCompat.AccessibilityActionCompat action : mInfo.getActionList()) {
+            if (action.getId() == MOVE_TO_POSITION_ID || action.getId() == ADD_TO_POSITION_ID
+                    || action.getId() == AccessibilityNodeInfo.ACTION_CLICK) {
+                fail("It should not have special action " + action.getId());
+            }
+        }
+    }
+
+    @Test
+    public void testInfoNoSpecialActionsWhenCannotStartAccessibleAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(false);
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        for (AccessibilityNodeInfoCompat.AccessibilityActionCompat action : mInfo.getActionList()) {
+            if (action.getId() == MOVE_TO_POSITION_ID || action.getId() == ADD_TO_POSITION_ID
+                    || action.getId() == AccessibilityNodeInfo.ACTION_CLICK) {
+                fail("It should not have special action " + action.getId());
+            }
+        }
+    }
+
+    @Test
+    public void testNoCollectionItemInfo() {
+        mInfo.setCollectionItemInfo(
+                AccessibilityNodeInfoCompat.CollectionItemInfoCompat.obtain(0, 1, 0, 1, false));
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(mInfo.getCollectionItemInfo()).isNull();
+    }
+
+    @Test
+    public void testStateDescriptionHasPositionForCurrentTile() {
+        mView.setTag(mHolder);
+        int position = 3;
+        when(mHolder.getLayoutPosition()).thenReturn(position);
+        when(mHolder.isCurrentTile()).thenReturn(true);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+
+        String expectedString = mContext.getString(POSITION_STRING_ID, position);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(mInfo.getStateDescription()).isEqualTo(expectedString);
+    }
+
+    @Test
+    public void testStateDescriptionEmptyForNotCurrentTile() {
+        mView.setTag(mHolder);
+        int position = 3;
+        when(mHolder.getLayoutPosition()).thenReturn(position);
+        when(mHolder.isCurrentTile()).thenReturn(false);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(mInfo.getStateDescription()).isEqualTo("");
+    }
+
+    @Test
+    public void testClickAddAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.canAdd()).thenReturn(true);
+        when(mHolder.canRemove()).thenReturn(false);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+
+        String expectedString = mContext.getString(R.string.accessibility_qs_edit_tile_add_action);
+        AccessibilityNodeInfoCompat.AccessibilityActionCompat action =
+                getActionForId(mInfo, AccessibilityNodeInfo.ACTION_CLICK);
+        assertThat(action.getLabel().toString()).contains(expectedString);
+    }
+
+    @Test
+    public void testClickRemoveAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.canAdd()).thenReturn(false);
+        when(mHolder.canRemove()).thenReturn(true);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+
+        String expectedString = mContext.getString(
+                R.string.accessibility_qs_edit_remove_tile_action);
+        AccessibilityNodeInfoCompat.AccessibilityActionCompat action =
+                getActionForId(mInfo, AccessibilityNodeInfo.ACTION_CLICK);
+        assertThat(action.getLabel().toString()).contains(expectedString);
+    }
+
+    @Test
+    public void testNoClickAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.canAdd()).thenReturn(false);
+        when(mHolder.canRemove()).thenReturn(false);
+        mInfo.addAction(AccessibilityNodeInfo.ACTION_CLICK);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+
+        AccessibilityNodeInfoCompat.AccessibilityActionCompat action =
+                getActionForId(mInfo, AccessibilityNodeInfo.ACTION_CLICK);
+        assertThat(action).isNull();
+    }
+
+    @Test
+    public void testAddToPositionAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.canAdd()).thenReturn(true);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(getActionForId(mInfo, ADD_TO_POSITION_ID)).isNotNull();
+    }
+
+    @Test
+    public void testNoAddToPositionAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.canAdd()).thenReturn(false);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(getActionForId(mInfo, ADD_TO_POSITION_ID)).isNull();
+    }
+
+    @Test
+    public void testMoveToPositionAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.isCurrentTile()).thenReturn(true);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(getActionForId(mInfo, MOVE_TO_POSITION_ID)).isNotNull();
+    }
+
+    @Test
+    public void testNoMoveToPositionAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+        when(mHolder.isCurrentTile()).thenReturn(false);
+
+        mDelegate.onInitializeAccessibilityNodeInfo(mView, mInfo);
+        assertThat(getActionForId(mInfo, MOVE_TO_POSITION_ID)).isNull();
+    }
+
+    @Test
+    public void testNoInteractionsWhenCannotTakeAccessibleAction() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(false);
+
+        mDelegate.performAccessibilityAction(mView, AccessibilityNodeInfo.ACTION_CLICK, null);
+        mDelegate.performAccessibilityAction(mView, MOVE_TO_POSITION_ID, new Bundle());
+        mDelegate.performAccessibilityAction(mView, ADD_TO_POSITION_ID, new Bundle());
+
+        verify(mHolder, never()).toggleState();
+        verify(mHolder, never()).startAccessibleAdd();
+        verify(mHolder, never()).startAccessibleMove();
+    }
+
+    @Test
+    public void testClickActionTogglesState() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+
+        mDelegate.performAccessibilityAction(mView, AccessibilityNodeInfo.ACTION_CLICK, null);
+
+        verify(mHolder).toggleState();
+    }
+
+    @Test
+    public void testAddToPositionActionStartsAccessibleAdd() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+
+        mDelegate.performAccessibilityAction(mView, ADD_TO_POSITION_ID, null);
+
+        verify(mHolder).startAccessibleAdd();
+    }
+
+    @Test
+    public void testMoveToPositionActionStartsAccessibleMove() {
+        mView.setTag(mHolder);
+        when(mHolder.canTakeAccessibleAction()).thenReturn(true);
+
+        mDelegate.performAccessibilityAction(mView, MOVE_TO_POSITION_ID, null);
+
+        verify(mHolder).startAccessibleMove();
+    }
+
+    private AccessibilityNodeInfoCompat.AccessibilityActionCompat getActionForId(
+            AccessibilityNodeInfoCompat info, int action) {
+        for (AccessibilityNodeInfoCompat.AccessibilityActionCompat a : info.getActionList()) {
+            if (a.getId() == action) {
+                return a;
+            }
+        }
+        return null;
+    }
+}