Dream settings refactor.

We will be re-using the grid UI for the dream complication picker, so
this change refactors some of that logic so it can be re-used in the
complication controller.

We also update some of the UI here to match the most recent UX
decisions.

http://screen/BxhAwZwQSVoxUmN.png

Test: locally on device
Test: make -j64 RunSettingsRoboTests ROBOTEST_FILTER="com.android.settings.dream.DreamPickerControllerTest"
Bug: 214250590
Bug: 215703483
Change-Id: I9fbfa0f0cd31ae3d119c7cd1a9562d4cdb203d6c

res/color/dream_card_color_state_list.xml

@@ -17,6 +17,6 @@
 
 <selector xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:androidprv="http://schemas.android.com/apk/prv/res/android">
-    <item android:state_activated="true" android:color="?androidprv:attr/colorSurfaceHighlight"/>
+    <item android:state_activated="true" android:color="?androidprv:attr/colorSurfaceVariant"/>
-    <item android:color="?androidprv:attr/colorSurface"/>
+    <item android:color="?androidprv:attr/colorSurfaceHighlight"/>
 </selector>

res/drawable/ic_dream_check_circle.xml

@@ -0,0 +1,24 @@
+<!--
+Copyright (C) 2022 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="@dimen/dream_item_icon_size"
+        android:height="@dimen/dream_item_icon_size"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12.0,2.0C6.48,2.0 2.0,6.48 2.0,12.0s4.48,10.0 10.0,10.0 10.0,-4.48 10.0,-10.0S17.52,2.0 12.0,2.0zm-2.0,15.0l-5.0,-5.0 1.41,-1.41L10.0,14.17l7.59,-7.59L19.0,8.0l-9.0,9.0z"/>
+</vector>

res/layout/dream_picker_layout.xml

@@ -15,28 +15,43 @@
     limitations under the License.
 -->
 
-<androidx.constraintlayout.widget.ConstraintLayout
+<LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
+    android:layout_height="wrap_content">
-    android:padding="@dimen/dream_picker_padding">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <androidx.cardview.widget.CardView
-        android:id="@+id/dream_list"
+        android:id="@+id/dream_picker_container"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:clipToPadding="true"
+        style="@style/DreamPickerBackgroundStyle">
-        android:nestedScrollingEnabled="false"/>
 
-    <Button
+        <androidx.constraintlayout.widget.ConstraintLayout
-        android:id="@+id/preview_button"
+            android:layout_width="match_parent"
-        style="@style/ActionPrimaryButton"
+            android:layout_height="wrap_content">
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/dream_preview_button_title"
-        app:layout_constraintTop_toBottomOf="@+id/dream_list"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"/>
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+            <androidx.recyclerview.widget.RecyclerView
+                android:id="@+id/dream_list"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:clipToPadding="true"
+                android:nestedScrollingEnabled="false"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"/>
+
+            <Button
+                android:id="@+id/preview_button"
+                style="@style/ActionPrimaryButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:visibility="gone"
+                android:text="@string/dream_preview_button_title"
+                app:layout_constraintTop_toBottomOf="@+id/dream_list"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"/>
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+
+    </androidx.cardview.widget.CardView>
+</LinearLayout>

res/layout/dream_preference_layout.xml

@@ -17,18 +17,17 @@
 
 <androidx.cardview.widget.CardView
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="10dp"
     style="@style/DreamCardStyle"
     android:clickable="true">
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_margin="8dp"
         android:minHeight="?android:attr/listPreferredItemHeight">
 
         <androidx.cardview.widget.CardView
@@ -37,16 +36,14 @@
             android:layout_height="0dp"
             app:cardCornerRadius="@dimen/dream_item_corner_radius"
             app:cardElevation="0dp"
-            app:layout_constraintDimensionRatio="3:2"
+            app:layout_constraintDimensionRatio="1:1"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintStart_toStartOf="parent">
-
             <ImageView
                 android:id="@+id/preview"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:scaleType="centerCrop"/>
-
         </androidx.cardview.widget.CardView>
 
         <Button
@@ -63,12 +60,14 @@
 
         <ImageView
             android:id="@+id/icon"
-            android:layout_width="18dp"
+            android:layout_width="@dimen/dream_item_icon_size"
             android:layout_height="0dp"
-            android:layout_marginTop="18dp"
+            android:layout_marginTop="@dimen/dream_item_title_margin_top"
-            android:layout_marginStart="10dp"
+            android:layout_marginStart="@dimen/dream_item_icon_margin_start"
-            android:layout_marginBottom="10dp"
+            android:layout_marginBottom="@dimen/dream_item_title_margin_bottom"
+            android:gravity="center_vertical"
             app:layout_constraintDimensionRatio="1:1"
+            app:layout_constraintHorizontal_chainStyle="packed"
             app:layout_constraintTop_toBottomOf="@+id/preview_container"
             app_layout_constraintEnd_toStartOf="@+id/title_text"
             app:layout_constraintStart_toStartOf="parent"/>
@@ -77,9 +76,10 @@
             android:id="@+id/title_text"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_marginStart="18dp"
+            android:layout_marginTop="@dimen/dream_item_title_margin_top"
-            android:layout_marginTop="16dp"
+            android:layout_marginStart="@dimen/dream_item_title_margin_start"
-            android:layout_marginBottom="10dp"
+            android:layout_marginBottom="@dimen/dream_item_title_margin_bottom"
+            android:gravity="center_vertical"
             android:maxLines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceListItemSmall"
@@ -87,18 +87,5 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@+id/icon"/>
 
-        <TextView
-            android:id="@+id/summary_text"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:textColor="?android:attr/textColorSecondary"
-            android:maxLines="2"
-            android:layout_marginBottom="8dp"
-            android:layout_marginStart="8dp"
-            android:layout_marginEnd="8dp"
-            app:layout_constraintTop_toBottomOf="@+id/title_text"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"/>
-
     </androidx.constraintlayout.widget.ConstraintLayout>
 </androidx.cardview.widget.CardView>

res/values/dimens.xml

@@ -441,11 +441,17 @@
     <dimen name="chartview_trapezoid_margin_bottom">2dp</dimen>
 
     <!-- Dimensions for Dream settings cards -->
-    <dimen name="dream_item_min_column_width">230dp</dimen>
+    <dimen name="dream_item_min_column_width">210dp</dimen>
-    <dimen name="dream_item_corner_radius">@*android:dimen/config_dialogCornerRadius</dimen>
+    <dimen name="dream_item_corner_radius">28dp</dimen>
-    <dimen name="dream_preference_margin_horizontal">4dp</dimen>
+    <dimen name="dream_item_content_padding">8dp</dimen>
-    <dimen name="dream_preference_margin_bottom">8dp</dimen>
+    <dimen name="dream_item_icon_size">20dp</dimen>
-    <dimen name="dream_picker_padding">40dp</dimen>
+    <dimen name="dream_item_title_margin_top">18dp</dimen>
+    <dimen name="dream_item_title_margin_bottom">8dp</dimen>
+    <dimen name="dream_item_title_margin_start">18dp</dimen>
+    <dimen name="dream_item_icon_margin_start">10dp</dimen>
+    <dimen name="dream_preference_margin_horizontal">10dp</dimen>
+    <dimen name="dream_preference_margin_bottom">20dp</dimen>
+    <dimen name="dream_picker_margin_horizontal">48dp</dimen>
 
     <!-- Sims/Data mobile/Calls/SMS select dialog-->
     <dimen name="sims_select_margin_bottom">24dp</dimen>

res/values/styles.xml

@@ -951,5 +951,16 @@
         <item name="cardCornerRadius">@dimen/dream_item_corner_radius</item>
         <item name="cardElevation">0dp</item>
         <item name="rippleColor">?android:attr/colorControlHighlight</item>
+        <item name="contentPadding">@dimen/dream_item_content_padding</item>
+    </style>
+
+    <style name="DreamPickerBackgroundStyle">
+        <item name="android:layout_marginBottom">48dp</item>
+        <item name="android:layout_marginStart">@dimen/dream_picker_margin_horizontal</item>
+        <item name="android:layout_marginEnd">@dimen/dream_picker_margin_horizontal</item>
+        <item name="cardBackgroundColor">?androidprv:attr/colorSurface</item>
+        <item name="cardCornerRadius">24dp</item>
+        <item name="cardElevation">0dp</item>
+        <item name="contentPadding">32dp</item>
     </style>
 </resources>

src/com/android/settings/dream/AutoFitGridLayoutManager.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 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.settings.dream;
+
+import android.content.Context;
+
+import androidx.recyclerview.widget.GridLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.settings.R;
+
+/** Grid layout manager that calculates the number of columns for the screen size. */
+final class AutoFitGridLayoutManager extends GridLayoutManager {
+    private final float mColumnWidth;
+
+    AutoFitGridLayoutManager(Context context) {
+        super(context, /* spanCount= */ 1);
+        this.mColumnWidth = context
+                .getResources()
+                .getDimensionPixelSize(R.dimen.dream_item_min_column_width);
+    }
+
+    @Override
+    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
+        final int totalSpace = getWidth() - getPaddingRight() - getPaddingLeft();
+        final int spanCount = Math.max(1, (int) (totalSpace / mColumnWidth));
+        setSpanCount(spanCount);
+        super.onLayoutChildren(recycler, state);
+    }
+}

src/com/android/settings/dream/DreamAdapter.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2022 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.settings.dream;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.VectorDrawable;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.settings.R;
+import com.android.settingslib.Utils;
+
+import java.util.List;
+
+/**
+ * RecyclerView adapter which displays list of items for the user to select.
+ */
+class DreamAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+    private final List<IDreamItem> mItemList;
+
+    /**
+     * View holder for each {@link IDreamItem}.
+     */
+    private static class DreamViewHolder extends RecyclerView.ViewHolder {
+        private final ImageView mIconView;
+        private final TextView mTitleView;
+        private final ImageView mPreviewView;
+        private final Button mCustomizeButton;
+        private final Context mContext;
+
+        DreamViewHolder(View view, Context context) {
+            super(view);
+            mContext = context;
+            mPreviewView = view.findViewById(R.id.preview);
+            mIconView = view.findViewById(R.id.icon);
+            mTitleView = view.findViewById(R.id.title_text);
+            mCustomizeButton = view.findViewById(R.id.customize_button);
+        }
+
+        /**
+         * Bind the view at the given position, populating the view with the provided data.
+         */
+        public void bindView(IDreamItem item) {
+            mTitleView.setText(item.getTitle());
+            mPreviewView.setImageDrawable(item.getPreviewImage());
+
+            final Drawable icon = item.getIcon();
+            if (icon instanceof VectorDrawable) {
+                icon.setTint(Utils.getColorAttrDefaultColor(mContext,
+                        com.android.internal.R.attr.colorAccentPrimaryVariant));
+            }
+            mIconView.setImageDrawable(icon);
+            if (item.allowCustomization()) {
+                mCustomizeButton.setVisibility(View.VISIBLE);
+                mCustomizeButton.setOnClickListener(v -> item.onCustomizeClicked());
+            } else {
+                mCustomizeButton.setVisibility(View.GONE);
+            }
+            itemView.setOnClickListener(v -> item.onItemClicked());
+            itemView.setActivated(item.isActive());
+        }
+    }
+
+    DreamAdapter(List<IDreamItem> itemList) {
+        mItemList = itemList;
+    }
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {
+        View view = LayoutInflater.from(viewGroup.getContext())
+                .inflate(R.layout.dream_preference_layout, viewGroup, false);
+        return new DreamViewHolder(view, viewGroup.getContext());
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
+        ((DreamViewHolder) viewHolder).bindView(mItemList.get(i));
+    }
+
+    @Override
+    public int getItemCount() {
+        return mItemList.size();
+    }
+}

src/com/android/settings/dream/DreamPickerAdapter.java

@@ -1,129 +0,0 @@
-/*
- * Copyright (C) 2022 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.settings.dream;
-
-
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.Button;
-import android.widget.ImageView;
-import android.widget.TextView;
-
-import androidx.annotation.NonNull;
-import androidx.recyclerview.widget.RecyclerView;
-
-import com.android.settings.R;
-import com.android.settingslib.dream.DreamBackend.DreamInfo;
-
-import java.util.List;
-
-/**
- * RecyclerView adapter which displays list of available dreams for the user to select.
- */
-class DreamPickerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
-    private final List<DreamInfo> mDreamInfoList;
-    private final OnItemClickListener mItemClickListener;
-    private final OnItemClickListener mOnDreamSelected = new OnItemClickListener() {
-        @Override
-        public void onItemClicked(DreamInfo dreamInfo) {
-            if (mItemClickListener != null) {
-                mItemClickListener.onItemClicked(dreamInfo);
-            }
-            mDreamInfoList.forEach(dream -> {
-                if (dream != null) {
-                    dream.isActive = false;
-                }
-            });
-            dreamInfo.isActive = true;
-            notifyDataSetChanged();
-        }
-    };
-    private final OnItemClickListener mOnCustomizeListener;
-
-    interface OnItemClickListener {
-        void onItemClicked(DreamInfo dreamInfo);
-    }
-
-    /**
-     * View holder for each Dream service.
-     */
-    private static class DreamViewHolder extends RecyclerView.ViewHolder {
-        private final ImageView mIconView;
-        private final TextView mTitleView;
-        private final TextView mSummaryView;
-        private final ImageView mPreviewView;
-        private final Button mCustomizeButton;
-
-        DreamViewHolder(View view) {
-            super(view);
-            mPreviewView = view.findViewById(R.id.preview);
-            mIconView = view.findViewById(R.id.icon);
-            mTitleView = view.findViewById(R.id.title_text);
-            mSummaryView = view.findViewById(R.id.summary_text);
-            mCustomizeButton = view.findViewById(R.id.customize_button);
-        }
-
-        /**
-         * Bind the dream service view at the given position. Add details on the
-         * dream's icon, name and description.
-         */
-        public void bindView(DreamInfo dreamInfo, OnItemClickListener clickListener,
-                OnItemClickListener customizeListener) {
-            mIconView.setImageDrawable(dreamInfo.icon);
-            mTitleView.setText(dreamInfo.caption);
-            mPreviewView.setImageDrawable(dreamInfo.previewImage);
-            mSummaryView.setText(dreamInfo.description);
-            itemView.setActivated(dreamInfo.isActive);
-            if (dreamInfo.isActive && dreamInfo.settingsComponentName != null) {
-                mCustomizeButton.setVisibility(View.VISIBLE);
-                mCustomizeButton.setOnClickListener(
-                        v -> customizeListener.onItemClicked(dreamInfo));
-            } else {
-                mCustomizeButton.setVisibility(View.GONE);
-            }
-
-            itemView.setOnClickListener(v -> clickListener.onItemClicked(dreamInfo));
-        }
-    }
-
-    DreamPickerAdapter(List<DreamInfo> dreamInfos, OnItemClickListener clickListener,
-            OnItemClickListener onCustomizeListener) {
-        mDreamInfoList = dreamInfos;
-        mItemClickListener = clickListener;
-        mOnCustomizeListener = onCustomizeListener;
-    }
-
-    @NonNull
-    @Override
-    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {
-        View view = LayoutInflater.from(viewGroup.getContext())
-                .inflate(R.layout.dream_preference_layout, viewGroup, false);
-        return new DreamViewHolder(view);
-    }
-
-    @Override
-    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
-        ((DreamViewHolder) viewHolder).bindView(mDreamInfoList.get(i), mOnDreamSelected,
-                mOnCustomizeListener);
-    }
-
-    @Override
-    public int getItemCount() {
-        return mDreamInfoList.size();
-    }
-}

src/com/android/settings/dream/DreamPickerController.java

@@ -18,22 +18,23 @@ package com.android.settings.dream;
 
 import android.app.settings.SettingsEnums;
 import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.view.View;
 import android.widget.Button;
 
 import androidx.annotation.Nullable;
 import androidx.preference.Preference;
-import androidx.recyclerview.widget.GridLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
-import com.android.settings.dream.DreamPickerAdapter.OnItemClickListener;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
 import com.android.settingslib.dream.DreamBackend;
 import com.android.settingslib.widget.LayoutPreference;
 
 import java.util.List;
+import java.util.stream.Collectors;
 
 /**
  * Controller for the dream picker where the user can select a screensaver.
@@ -44,32 +45,11 @@ public class DreamPickerController extends BasePreferenceController {
     private final DreamBackend mBackend;
     private final MetricsFeatureProvider mMetricsFeatureProvider;
     private final List<DreamBackend.DreamInfo> mDreamInfos;
+    private final Drawable mActiveDrawable;
     private Button mPreviewButton;
     @Nullable
     private DreamBackend.DreamInfo mActiveDream;
-
+    private DreamAdapter mAdapter;
-    private final OnItemClickListener mItemClickListener =
-            new OnItemClickListener() {
-                @Override
-                public void onItemClicked(DreamBackend.DreamInfo dreamInfo) {
-                    mActiveDream = dreamInfo;
-                    mMetricsFeatureProvider.action(
-                            mContext,
-                            SettingsEnums.ACTION_DREAM_SELECT_TYPE,
-                            mActiveDream == null ? null
-                                    : mActiveDream.componentName.flattenToString());
-                    mBackend.setActiveDream(
-                            mActiveDream == null ? null : mActiveDream.componentName);
-                    updatePreviewButtonState();
-                }
-            };
-
-    private final OnItemClickListener mCustomizeListener = new OnItemClickListener() {
-        @Override
-        public void onItemClicked(DreamBackend.DreamInfo dreamInfo) {
-            mBackend.launchSettings(mContext, dreamInfo);
-        }
-    };
 
     public DreamPickerController(Context context, String preferenceKey) {
         this(context, preferenceKey, DreamBackend.getInstance(context));
@@ -79,6 +59,7 @@ public class DreamPickerController extends BasePreferenceController {
         super(context, preferenceKey);
         mBackend = backend;
         mDreamInfos = mBackend.getDreamInfos();
+        mActiveDrawable = context.getDrawable(R.drawable.ic_dream_check_circle);
         mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
     }
 
@@ -98,15 +79,17 @@ public class DreamPickerController extends BasePreferenceController {
 
         mActiveDream = getActiveDreamInfo();
 
-        final DreamPickerAdapter adapter =
+        mAdapter = new DreamAdapter(mDreamInfos.stream()
-                new DreamPickerAdapter(mDreamInfos, mItemClickListener, mCustomizeListener);
+                .map(DreamItem::new)
+                .collect(Collectors.toList()));
 
         final RecyclerView recyclerView =
                 ((LayoutPreference) preference).findViewById(R.id.dream_list);
         recyclerView.setLayoutManager(new AutoFitGridLayoutManager(mContext));
-        recyclerView.setAdapter(adapter);
+        recyclerView.setAdapter(mAdapter);
 
         mPreviewButton = ((LayoutPreference) preference).findViewById(R.id.preview_button);
+        mPreviewButton.setVisibility(View.VISIBLE);
         mPreviewButton.setOnClickListener(v -> mBackend.preview(mActiveDream));
         updatePreviewButtonState();
     }
@@ -126,23 +109,56 @@ public class DreamPickerController extends BasePreferenceController {
                 .orElse(null);
     }
 
-    /** Grid layout manager that calculates the number of columns for the screen size. */
+    private class DreamItem implements IDreamItem {
-    private static final class AutoFitGridLayoutManager extends GridLayoutManager {
+        DreamBackend.DreamInfo mDreamInfo;
-        private final float mColumnWidth;
 
-        AutoFitGridLayoutManager(Context context) {
+        DreamItem(DreamBackend.DreamInfo dreamInfo) {
-            super(context, /* spanCount= */ 1);
+            mDreamInfo = dreamInfo;
-            this.mColumnWidth = context
-                    .getResources()
-                    .getDimensionPixelSize(R.dimen.dream_item_min_column_width);
         }
 
         @Override
-        public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
+        public CharSequence getTitle() {
-            final int totalSpace = getWidth() - getPaddingRight() - getPaddingLeft();
+            return mDreamInfo.caption;
-            final int spanCount = Math.max(1, (int) (totalSpace / mColumnWidth));
+        }
-            setSpanCount(spanCount);
+
-            super.onLayoutChildren(recycler, state);
+        @Override
+        public Drawable getIcon() {
+            return isActive() ? mActiveDrawable : mDreamInfo.icon;
+        }
+
+        @Override
+        public void onItemClicked() {
+            mActiveDream = mDreamInfo;
+            mBackend.setActiveDream(mDreamInfo.componentName);
+            mAdapter.notifyDataSetChanged();
+            updatePreviewButtonState();
+            mMetricsFeatureProvider.action(
+                    mContext,
+                    SettingsEnums.ACTION_DREAM_SELECT_TYPE,
+                    mDreamInfo.componentName.flattenToString());
+        }
+
+        @Override
+        public void onCustomizeClicked() {
+            mBackend.launchSettings(mContext, mDreamInfo);
+        }
+
+        @Override
+        public Drawable getPreviewImage() {
+            return mDreamInfo.previewImage;
+        }
+
+        @Override
+        public boolean isActive() {
+            if (mActiveDream == null) {
+                return false;
+            }
+            return mDreamInfo.componentName.equals(mActiveDream.componentName);
+        }
+
+        @Override
+        public boolean allowCustomization() {
+            return isActive() && mDreamInfo.settingsComponentName != null;
         }
     }
 }

src/com/android/settings/dream/IDreamItem.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2022 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.settings.dream;
+
+import android.graphics.drawable.Drawable;
+
+interface IDreamItem {
+    CharSequence getTitle();
+
+    Drawable getIcon();
+
+    void onItemClicked();
+
+    void onCustomizeClicked();
+
+    Drawable getPreviewImage();
+
+    boolean isActive();
+
+    boolean allowCustomization();
+}