Add a status bar to dream overlay.

This change adds a status bar (with battery and wifi icons) to dream overlays. Test: atest DreamOverlayStatusBarViewControllerTest, atest DreamOverlayServiceTest Bug: 207681288 Change-Id: I32b1fc452364fb7d072bb2d84fd205e31909b642
2021-12-05 14:27:13 -08:00
parent 48845b2b7e
commit cebb50f61e
12 changed files with 839 additions and 40 deletions
--- a/packages/SystemUI/res/drawable/ic_signal_wifi_off.xml
+++ b/packages/SystemUI/res/drawable/ic_signal_wifi_off.xml
@@ -0,0 +1,24 @@
+<!--
+  ~ Copyright (C) 2021 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="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M18.575,15.2L7.55,4.175q1.1,-0.325 2.212,-0.462 1.113,-0.138 2.238,-0.138 3.45,0 6.55,1.45Q21.65,6.475 24,9zM20.225,23.575l-4.75,-4.75 -3.475,4.1L0,9q0.675,-0.725 1.438,-1.4 0.762,-0.675 1.612,-1.225l-2.625,-2.6L2.1,2.1l19.8,19.8z"/>
+</vector>
--- a/packages/SystemUI/res/layout/dream_overlay_container.xml
+++ b/packages/SystemUI/res/layout/dream_overlay_container.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 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.
+-->
+<com.android.systemui.dreams.DreamOverlayContainerView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/dream_overlay_container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/dream_overlay_content"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
+    <com.android.systemui.dreams.DreamOverlayStatusBarView
+        android:id="@+id/dream_overlay_status_bar"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/dream_overlay_status_bar_height"
+        android:layout_marginEnd="@dimen/dream_overlay_status_bar_margin"
+        android:layout_marginStart="@dimen/dream_overlay_status_bar_margin"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:id="@+id/dream_overlay_system_status"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            app:layout_constraintEnd_toEndOf="parent">
+
+            <com.android.systemui.statusbar.AlphaOptimizedImageView
+                android:id="@+id/dream_overlay_wifi_status"
+                android:layout_width="@dimen/status_bar_wifi_signal_size"
+                android:layout_height="match_parent"
+                android:layout_marginEnd="@dimen/dream_overlay_status_icon_margin"
+                android:visibility="gone"
+                app:layout_constraintEnd_toStartOf="@id/dream_overlay_battery" />
+
+            <com.android.systemui.battery.BatteryMeterView
+                android:id="@+id/dream_overlay_battery"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                app:layout_constraintEnd_toEndOf="parent" />
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </com.android.systemui.dreams.DreamOverlayStatusBarView>
+</com.android.systemui.dreams.DreamOverlayContainerView>
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -1303,4 +1303,9 @@
    <dimen name="keyguard_unfold_translation_x">16dp</dimen>

    <dimen name="fgs_manager_min_width_minor">100%</dimen>
+
+    <!-- Dream overlay related dimensions -->
+    <dimen name="dream_overlay_status_bar_height">80dp</dimen>
+    <dimen name="dream_overlay_status_bar_margin">40dp</dimen>
+    <dimen name="dream_overlay_status_icon_margin">8dp</dimen>
 </resources>
--- a/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayContainerView.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayContainerView.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2021 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.dreams;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import androidx.constraintlayout.widget.ConstraintLayout;
+
+/**
+ * {@link DreamOverlayContainerView} contains a dream overlay and its status bar.
+ */
+public class DreamOverlayContainerView extends ConstraintLayout {
+    public DreamOverlayContainerView(Context context) {
+        this(context, null);
+    }
+
+    public DreamOverlayContainerView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public DreamOverlayContainerView(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public DreamOverlayContainerView(
+            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+}
--- a/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayService.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayService.java
@@ -29,11 +29,11 @@ import android.view.WindowInsets;
 import android.view.WindowManager;

 import androidx.annotation.NonNull;
-import androidx.constraintlayout.widget.ConstraintLayout;

 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.policy.PhoneWindow;
 import com.android.systemui.dagger.qualifiers.Main;
+import com.android.systemui.dreams.dagger.DreamOverlayComponent;

 import java.util.concurrent.Executor;

@@ -54,10 +54,12 @@ public class DreamOverlayService extends android.service.dreams.DreamOverlayServ
    private final Executor mExecutor;
    // The state controller informs the service of updates to the overlays present.
    private final DreamOverlayStateController mStateController;
+    // The component used to resolve dream overlay dependencies.
+    private final DreamOverlayComponent mDreamOverlayComponent;

-    // The window is populated once the dream informs the service it has begun dreaming.
-    private Window mWindow;
-    private ConstraintLayout mLayout;
+    // The dream overlay's content view, which is located below the status bar (in z-order) and is
+    // the space into which widgets are placed.
+    private ViewGroup mDreamOverlayContentView;

    private final DreamOverlayStateController.Callback mOverlayStateCallback =
            new DreamOverlayStateController.Callback() {
@@ -90,12 +92,12 @@ public class DreamOverlayService extends android.service.dreams.DreamOverlayServ
            new ViewTreeObserver.OnComputeInternalInsetsListener() {
        @Override
        public void onComputeInternalInsets(ViewTreeObserver.InternalInsetsInfo inoutInfo) {
-            if (mLayout != null) {
+            if (mDreamOverlayContentView != null) {
                inoutInfo.setTouchableInsets(
                        ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_REGION);
                final Region region = new Region();
-                for (int i = 0; i < mLayout.getChildCount(); i++) {
-                    View child = mLayout.getChildAt(i);
+                for (int i = 0; i < mDreamOverlayContentView.getChildCount(); i++) {
+                    View child = mDreamOverlayContentView.getChildAt(i);
                    final Rect rect = new Rect();
                    child.getGlobalVisibleRect(rect);
                    region.op(rect, Region.Op.UNION);
@@ -106,16 +108,30 @@ public class DreamOverlayService extends android.service.dreams.DreamOverlayServ
        }
    };

+    @Inject
+    public DreamOverlayService(
+            Context context,
+            @Main Executor executor,
+            DreamOverlayStateController overlayStateController,
+            DreamOverlayComponent.Factory dreamOverlayComponentFactory) {
+        mContext = context;
+        mExecutor = executor;
+        mStateController = overlayStateController;
+        mDreamOverlayComponent = dreamOverlayComponentFactory.create();
+
+        mStateController.addCallback(mOverlayStateCallback);
+    }
+
    @Override
    public void onStartDream(@NonNull WindowManager.LayoutParams layoutParams) {
        mExecutor.execute(() -> addOverlayWindowLocked(layoutParams));
    }

    private void reloadOverlaysLocked() {
-        if (mLayout == null) {
+        if (mDreamOverlayContentView == null) {
            return;
        }
-        mLayout.removeAllViews();
+        mDreamOverlayContentView.removeAllViews();
        for (OverlayProvider overlayProvider : mStateController.getOverlays()) {
            addOverlay(overlayProvider);
        }
@@ -129,31 +145,30 @@ public class DreamOverlayService extends android.service.dreams.DreamOverlayServ
     *                     into the dream window.
     */
    private void addOverlayWindowLocked(WindowManager.LayoutParams layoutParams) {
-        mWindow = new PhoneWindow(mContext);
-        mWindow.setAttributes(layoutParams);
-        mWindow.setWindowManager(null, layoutParams.token, "DreamOverlay", true);
+        final PhoneWindow window = new PhoneWindow(mContext);
+        window.setAttributes(layoutParams);
+        window.setWindowManager(null, layoutParams.token, "DreamOverlay", true);

-        mWindow.setBackgroundDrawable(new ColorDrawable(0));
+        window.setBackgroundDrawable(new ColorDrawable(0));

-        mWindow.clearFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
-        mWindow.addFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
-        mWindow.requestFeature(Window.FEATURE_NO_TITLE);
+        window.clearFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
+        window.addFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
+        window.requestFeature(Window.FEATURE_NO_TITLE);
        // Hide all insets when the dream is showing
-        mWindow.getDecorView().getWindowInsetsController().hide(WindowInsets.Type.systemBars());
-        mWindow.setDecorFitsSystemWindows(false);
+        window.getDecorView().getWindowInsetsController().hide(WindowInsets.Type.systemBars());
+        window.setDecorFitsSystemWindows(false);

        if (DEBUG) {
            Log.d(TAG, "adding overlay window to dream");
        }

-        mLayout = new ConstraintLayout(mContext);
-        mLayout.setLayoutParams(new ViewGroup.LayoutParams(
-                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
-        mLayout.addOnAttachStateChangeListener(mRootViewAttachListener);
-        mWindow.setContentView(mLayout);
+        window.setContentView(mDreamOverlayComponent.getDreamOverlayContainerView());
+        mDreamOverlayContentView = mDreamOverlayComponent.getDreamOverlayContentView();
+
+        mDreamOverlayComponent.getDreamOverlayStatusBarViewController().init();

        final WindowManager windowManager = mContext.getSystemService(WindowManager.class);
-        windowManager.addView(mWindow.getDecorView(), mWindow.getAttributes());
+        windowManager.addView(window.getDecorView(), window.getAttributes());
        mExecutor.execute(this::reloadOverlaysLocked);
    }

@@ -163,11 +178,11 @@ public class DreamOverlayService extends android.service.dreams.DreamOverlayServ
                (view, layoutParams) -> {
                    // Always move UI related work to the main thread.
                    mExecutor.execute(() -> {
-                        if (mLayout == null) {
+                        if (mDreamOverlayContentView == null) {
                            return;
                        }

-                        mLayout.addView(view, layoutParams);
+                        mDreamOverlayContentView.addView(view, layoutParams);
                    });
                },
                () -> {
@@ -178,15 +193,6 @@ public class DreamOverlayService extends android.service.dreams.DreamOverlayServ
                });
    }

-    @Inject
-    public DreamOverlayService(Context context, @Main Executor executor,
-            DreamOverlayStateController overlayStateController) {
-        mContext = context;
-        mExecutor = executor;
-        mStateController = overlayStateController;
-        mStateController.addCallback(mOverlayStateCallback);
-    }
-
    @Override
    public void onDestroy() {
        mStateController.removeCallback(mOverlayStateCallback);
--- a/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStatusBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStatusBarView.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2021 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.dreams;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.ImageView;
+
+import androidx.constraintlayout.widget.ConstraintLayout;
+
+import com.android.internal.util.Preconditions;
+import com.android.systemui.R;
+import com.android.systemui.battery.BatteryMeterView;
+import com.android.systemui.statusbar.policy.BatteryController.BatteryStateChangeCallback;
+
+/**
+ * {@link DreamOverlayStatusBarView} is the view responsible for displaying the status bar in a
+ * dream. The status bar includes status icons such as battery and wifi.
+ */
+public class DreamOverlayStatusBarView extends ConstraintLayout implements
+        BatteryStateChangeCallback {
+
+    private BatteryMeterView mBatteryView;
+    private ImageView mWifiStatusView;
+
+    public DreamOverlayStatusBarView(Context context) {
+        this(context, null);
+    }
+
+    public DreamOverlayStatusBarView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public DreamOverlayStatusBarView(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public DreamOverlayStatusBarView(
+            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        mBatteryView = Preconditions.checkNotNull(findViewById(R.id.dream_overlay_battery),
+                "R.id.dream_overlay_battery must not be null");
+        mWifiStatusView = Preconditions.checkNotNull(findViewById(R.id.dream_overlay_wifi_status),
+                "R.id.dream_overlay_wifi_status must not be null");
+
+        mWifiStatusView.setImageDrawable(getContext().getDrawable(R.drawable.ic_signal_wifi_off));
+    }
+
+    /**
+     * Whether to show the battery percent text next to the battery status icons.
+     * @param show True if the battery percent text should be shown.
+     */
+    void showBatteryPercentText(boolean show) {
+        mBatteryView.setForceShowPercent(show);
+    }
+
+    /**
+     * Whether to show the wifi status icon.
+     * @param show True if the wifi status icon should be shown.
+     */
+    void showWifiStatus(boolean show) {
+        // Only show the wifi status icon when wifi isn't available.
+        mWifiStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
+    }
+}
--- a/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStatusBarViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStatusBarViewController.java
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2021 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.dreams;
+
+import android.annotation.IntDef;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+
+import com.android.systemui.battery.BatteryMeterViewController;
+import com.android.systemui.dreams.dagger.DreamOverlayComponent;
+import com.android.systemui.dreams.dagger.DreamOverlayModule;
+import com.android.systemui.statusbar.policy.BatteryController;
+import com.android.systemui.util.ViewController;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
+/**
+ * View controller for {@link DreamOverlayStatusBarView}.
+ */
+@DreamOverlayComponent.DreamOverlayScope
+public class DreamOverlayStatusBarViewController extends ViewController<DreamOverlayStatusBarView> {
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "WIFI_STATUS_" }, value = {
+            WIFI_STATUS_UNKNOWN,
+            WIFI_STATUS_UNAVAILABLE,
+            WIFI_STATUS_AVAILABLE
+    })
+    private @interface WifiStatus {}
+    private static final int WIFI_STATUS_UNKNOWN = 0;
+    private static final int WIFI_STATUS_UNAVAILABLE = 1;
+    private static final int WIFI_STATUS_AVAILABLE = 2;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "BATTERY_STATUS_" }, value = {
+            BATTERY_STATUS_UNKNOWN,
+            BATTERY_STATUS_NOT_CHARGING,
+            BATTERY_STATUS_CHARGING
+    })
+    private @interface BatteryStatus {}
+    private static final int BATTERY_STATUS_UNKNOWN = 0;
+    private static final int BATTERY_STATUS_NOT_CHARGING = 1;
+    private static final int BATTERY_STATUS_CHARGING = 2;
+
+    private final BatteryController mBatteryController;
+    private final BatteryMeterViewController mBatteryMeterViewController;
+    private final ConnectivityManager mConnectivityManager;
+    private final boolean mShowPercentAvailable;
+
+    private final NetworkRequest mNetworkRequest = new NetworkRequest.Builder()
+            .clearCapabilities()
+            .addTransportType(NetworkCapabilities.TRANSPORT_WIFI).build();
+
+    private final NetworkCallback mNetworkCallback = new NetworkCallback() {
+        @Override
+        public void onCapabilitiesChanged(
+                Network network, NetworkCapabilities networkCapabilities) {
+            onWifiAvailabilityChanged(
+                    networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI));
+        }
+
+        @Override
+        public void onAvailable(Network network) {
+            onWifiAvailabilityChanged(true);
+        }
+
+        @Override
+        public void onLost(Network network) {
+            onWifiAvailabilityChanged(false);
+        }
+    };
+
+    private final BatteryController.BatteryStateChangeCallback mBatteryStateChangeCallback =
+            new BatteryController.BatteryStateChangeCallback() {
+                @Override
+                public void onBatteryLevelChanged(int level, boolean pluggedIn, boolean charging) {
+                    DreamOverlayStatusBarViewController.this.onBatteryLevelChanged(charging);
+                }
+            };
+
+    private @WifiStatus int mWifiStatus = WIFI_STATUS_UNKNOWN;
+    private @BatteryStatus int mBatteryStatus = BATTERY_STATUS_UNKNOWN;
+
+    @Inject
+    public DreamOverlayStatusBarViewController(
+            Context context,
+            DreamOverlayStatusBarView view,
+            BatteryController batteryController,
+            @Named(DreamOverlayModule.DREAM_OVERLAY_BATTERY_CONTROLLER)
+                    BatteryMeterViewController batteryMeterViewController,
+            ConnectivityManager connectivityManager) {
+        super(view);
+        mBatteryController = batteryController;
+        mBatteryMeterViewController = batteryMeterViewController;
+        mConnectivityManager = connectivityManager;
+
+        mShowPercentAvailable = context.getResources().getBoolean(
+                com.android.internal.R.bool.config_battery_percentage_setting_available);
+    }
+
+    @Override
+    protected void onInit() {
+        super.onInit();
+        mBatteryMeterViewController.init();
+    }
+
+    @Override
+    protected void onViewAttached() {
+        mBatteryController.addCallback(mBatteryStateChangeCallback);
+        mConnectivityManager.registerNetworkCallback(mNetworkRequest, mNetworkCallback);
+
+        NetworkCapabilities capabilities =
+                mConnectivityManager.getNetworkCapabilities(
+                        mConnectivityManager.getActiveNetwork());
+        onWifiAvailabilityChanged(
+                capabilities != null
+                        && capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI));
+    }
+
+    @Override
+    protected void onViewDetached() {
+        mBatteryController.removeCallback(mBatteryStateChangeCallback);
+        mConnectivityManager.unregisterNetworkCallback(mNetworkCallback);
+    }
+
+    /**
+     * Wifi availability has changed. Update the wifi status icon as appropriate.
+     * @param available Whether wifi is available.
+     */
+    private void onWifiAvailabilityChanged(boolean available) {
+        final int newWifiStatus = available ? WIFI_STATUS_AVAILABLE : WIFI_STATUS_UNAVAILABLE;
+        if (mWifiStatus != newWifiStatus) {
+            mWifiStatus = newWifiStatus;
+            mView.showWifiStatus(mWifiStatus == WIFI_STATUS_UNAVAILABLE);
+        }
+    }
+
+    /**
+     * The battery level has changed. Update the battery status icon as appropriate.
+     * @param charging Whether the battery is currently charging.
+     */
+    private void onBatteryLevelChanged(boolean charging) {
+        final int newBatteryStatus =
+                charging ? BATTERY_STATUS_CHARGING : BATTERY_STATUS_NOT_CHARGING;
+        if (mBatteryStatus != newBatteryStatus) {
+            mBatteryStatus = newBatteryStatus;
+            mView.showBatteryPercentText(
+                    mBatteryStatus == BATTERY_STATUS_CHARGING && mShowPercentAvailable);
+        }
+    }
+}
--- a/packages/SystemUI/src/com/android/systemui/dreams/dagger/DreamModule.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/dagger/DreamModule.java
@@ -21,8 +21,6 @@ import dagger.Module;
 /**
 * Dagger Module providing Communal-related functionality.
 */
-@Module(subcomponents = {
-        AppWidgetOverlayComponent.class,
-})
+@Module(subcomponents = {AppWidgetOverlayComponent.class, DreamOverlayComponent.class})
 public interface DreamModule {
 }
--- a/packages/SystemUI/src/com/android/systemui/dreams/dagger/DreamOverlayComponent.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/dagger/DreamOverlayComponent.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2021 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.dreams.dagger;
+
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+import android.view.ViewGroup;
+
+import com.android.systemui.dreams.DreamOverlayContainerView;
+import com.android.systemui.dreams.DreamOverlayStatusBarViewController;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+
+import javax.inject.Scope;
+
+import dagger.Subcomponent;
+
+/**
+ * Dagger subcomponent for {@link DreamOverlayModule}.
+ */
+@Subcomponent(modules = {DreamOverlayModule.class})
+@DreamOverlayComponent.DreamOverlayScope
+public interface DreamOverlayComponent {
+    /** Simple factory for {@link DreamOverlayComponent}. */
+    @Subcomponent.Factory
+    interface Factory {
+        DreamOverlayComponent create();
+    }
+
+    /** Scope annotation for singleton items within the {@link DreamOverlayComponent}. */
+    @Documented
+    @Retention(RUNTIME)
+    @Scope
+    @interface DreamOverlayScope {}
+
+    /** Builds a {@link DreamOverlayContainerView} */
+    @DreamOverlayScope
+    DreamOverlayContainerView getDreamOverlayContainerView();
+
+    /** Builds a content view for dream overlays */
+    @DreamOverlayScope
+    ViewGroup getDreamOverlayContentView();
+
+    /** Builds a {@link DreamOverlayStatusBarViewController}. */
+    @DreamOverlayScope
+    DreamOverlayStatusBarViewController getDreamOverlayStatusBarViewController();
+}
--- a/packages/SystemUI/src/com/android/systemui/dreams/dagger/DreamOverlayModule.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/dagger/DreamOverlayModule.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2021 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.dreams.dagger;
+
+import android.content.ContentResolver;
+import android.os.Handler;
+import android.view.LayoutInflater;
+import android.view.ViewGroup;
+
+import com.android.internal.util.Preconditions;
+import com.android.systemui.R;
+import com.android.systemui.battery.BatteryMeterView;
+import com.android.systemui.battery.BatteryMeterViewController;
+import com.android.systemui.broadcast.BroadcastDispatcher;
+import com.android.systemui.dagger.qualifiers.Main;
+import com.android.systemui.dreams.DreamOverlayContainerView;
+import com.android.systemui.dreams.DreamOverlayStatusBarView;
+import com.android.systemui.statusbar.policy.BatteryController;
+import com.android.systemui.statusbar.policy.ConfigurationController;
+import com.android.systemui.tuner.TunerService;
+
+import javax.inject.Named;
+
+import dagger.Module;
+import dagger.Provides;
+
+/** Dagger module for {@link DreamOverlayComponent}. */
+@Module
+public abstract class DreamOverlayModule {
+    private static final String DREAM_OVERLAY_BATTERY_VIEW = "dream_overlay_battery_view";
+    public static final String DREAM_OVERLAY_BATTERY_CONTROLLER =
+            "dream_overlay_battery_controller";
+
+    /** */
+    @Provides
+    @DreamOverlayComponent.DreamOverlayScope
+    public static DreamOverlayContainerView providesDreamOverlayContainerView(
+            LayoutInflater layoutInflater) {
+        return Preconditions.checkNotNull((DreamOverlayContainerView)
+                layoutInflater.inflate(R.layout.dream_overlay_container, null),
+                "R.layout.dream_layout_container could not be properly inflated");
+    }
+
+    /** */
+    @Provides
+    @DreamOverlayComponent.DreamOverlayScope
+    public static ViewGroup providesDreamOverlayContentView(DreamOverlayContainerView view) {
+        return Preconditions.checkNotNull(view.findViewById(R.id.dream_overlay_content),
+                "R.id.dream_overlay_content must not be null");
+    }
+
+    /** */
+    @Provides
+    @DreamOverlayComponent.DreamOverlayScope
+    public static DreamOverlayStatusBarView providesDreamOverlayStatusBarView(
+            DreamOverlayContainerView view) {
+        return Preconditions.checkNotNull(view.findViewById(R.id.dream_overlay_status_bar),
+                "R.id.status_bar must not be null");
+    }
+
+    /** */
+    @Provides
+    @DreamOverlayComponent.DreamOverlayScope
+    @Named(DREAM_OVERLAY_BATTERY_VIEW)
+    static BatteryMeterView providesBatteryMeterView(DreamOverlayContainerView view) {
+        return Preconditions.checkNotNull(view.findViewById(R.id.dream_overlay_battery),
+                "R.id.battery must not be null");
+    }
+
+    /** */
+    @Provides
+    @DreamOverlayComponent.DreamOverlayScope
+    @Named(DREAM_OVERLAY_BATTERY_CONTROLLER)
+    static BatteryMeterViewController providesBatteryMeterViewController(
+            @Named(DREAM_OVERLAY_BATTERY_VIEW) BatteryMeterView batteryMeterView,
+            ConfigurationController configurationController,
+            TunerService tunerService,
+            BroadcastDispatcher broadcastDispatcher,
+            @Main Handler mainHandler,
+            ContentResolver contentResolver,
+            BatteryController batteryController) {
+        return new BatteryMeterViewController(
+                batteryMeterView,
+                configurationController,
+                tunerService,
+                broadcastDispatcher,
+                mainHandler,
+                contentResolver,
+                batteryController);
+    }
+}
--- a/packages/SystemUI/tests/src/com/android/systemui/dreams/DreamOverlayServiceTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/dreams/DreamOverlayServiceTest.java
@@ -37,6 +37,7 @@ import androidx.test.filters.SmallTest;

 import com.android.systemui.SysuiTestCase;
 import com.android.systemui.SysuiTestableContext;
+import com.android.systemui.dreams.dagger.DreamOverlayComponent;
 import com.android.systemui.util.concurrency.FakeExecutor;
 import com.android.systemui.util.time.FakeSystemClock;
 import com.android.systemui.utils.leaks.LeakCheckedTest;
@@ -78,16 +79,41 @@ public class DreamOverlayServiceTest extends SysuiTestCase {
    @Mock
    DreamOverlayStateController mDreamOverlayStateController;

+    @Mock
+    DreamOverlayComponent.Factory mDreamOverlayStatusBarViewComponentFactory;
+
+    @Mock
+    DreamOverlayComponent mDreamOverlayComponent;
+
+    @Mock
+    DreamOverlayStatusBarViewController mDreamOverlayStatusBarViewController;
+
+    @Mock
+    DreamOverlayContainerView mDreamOverlayContainerView;
+
+    @Mock
+    ViewGroup mDreamOverlayContentView;
+
    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
        mContext.addMockSystemService(WindowManager.class, mWindowManager);
+
+        when(mDreamOverlayComponent.getDreamOverlayContentView())
+                .thenReturn(mDreamOverlayContentView);
+        when(mDreamOverlayComponent.getDreamOverlayContainerView())
+                .thenReturn(mDreamOverlayContainerView);
+        when(mDreamOverlayComponent.getDreamOverlayStatusBarViewController())
+                .thenReturn(mDreamOverlayStatusBarViewController);
+        when(mDreamOverlayStatusBarViewComponentFactory.create())
+                .thenReturn(mDreamOverlayComponent);
+
    }

    @Test
    public void testInteraction() throws Exception {
        final DreamOverlayService service = new DreamOverlayService(mContext, mMainExecutor,
-                mDreamOverlayStateController);
+                mDreamOverlayStateController, mDreamOverlayStatusBarViewComponentFactory);
        final IBinder proxy = service.onBind(new Intent());
        final IDreamOverlay overlay = IDreamOverlay.Stub.asInterface(proxy);
        clearInvocations(mWindowManager);
@@ -128,7 +154,7 @@ public class DreamOverlayServiceTest extends SysuiTestCase {
    @Test
    public void testListening() throws Exception {
        final DreamOverlayService service = new DreamOverlayService(mContext, mMainExecutor,
-                mDreamOverlayStateController);
+                mDreamOverlayStateController, mDreamOverlayStatusBarViewComponentFactory);

        final IBinder proxy = service.onBind(new Intent());
        final IDreamOverlay overlay = IDreamOverlay.Stub.asInterface(proxy);
@@ -150,4 +176,19 @@ public class DreamOverlayServiceTest extends SysuiTestCase {
        // Verify provider is asked to create overlay.
        verify(mProvider).onCreateOverlay(any(), any(), any());
    }
+
+    @Test
+    public void testDreamOverlayStatusBarViewControllerInitialized() throws Exception {
+        final DreamOverlayService service = new DreamOverlayService(mContext, mMainExecutor,
+                mDreamOverlayStateController, mDreamOverlayStatusBarViewComponentFactory);
+
+        final IBinder proxy = service.onBind(new Intent());
+        final IDreamOverlay overlay = IDreamOverlay.Stub.asInterface(proxy);
+
+        // Inform the overlay service of dream starting.
+        overlay.startDream(mWindowParams, mDreamOverlayCallback);
+        mMainExecutor.runAllReady();
+
+        verify(mDreamOverlayStatusBarViewController).init();
+    }
 }
--- a/packages/SystemUI/tests/src/com/android/systemui/dreams/DreamOverlayStatusBarViewControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/dreams/DreamOverlayStatusBarViewControllerTest.java
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2021 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.dreams;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+import android.testing.AndroidTestingRunner;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.systemui.SysuiTestCase;
+import com.android.systemui.battery.BatteryMeterViewController;
+import com.android.systemui.statusbar.policy.BatteryController;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@SmallTest
+@RunWith(AndroidTestingRunner.class)
+public class DreamOverlayStatusBarViewControllerTest extends SysuiTestCase {
+
+    @Mock
+    DreamOverlayStatusBarView mView;
+    @Mock
+    BatteryController mBatteryController;
+    @Mock
+    BatteryMeterViewController mBatteryMeterViewController;
+    @Mock
+    ConnectivityManager mConnectivityManager;
+    @Mock
+    NetworkCapabilities mNetworkCapabilities;
+    @Mock
+    Network mNetwork;
+
+    DreamOverlayStatusBarViewController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mController = new DreamOverlayStatusBarViewController(
+                mContext, mView, mBatteryController, mBatteryMeterViewController,
+                mConnectivityManager);
+    }
+
+    @Test
+    public void testOnInitInitializesControllers() {
+        mController.onInit();
+        verify(mBatteryMeterViewController).init();
+    }
+
+    @Test
+    public void testOnViewAttachedAddsBatteryControllerCallback() {
+        mController.onViewAttached();
+        verify(mBatteryController)
+                .addCallback(any(BatteryController.BatteryStateChangeCallback.class));
+    }
+
+    @Test
+    public void testOnViewAttachedRegistersNetworkCallback() {
+        mController.onViewAttached();
+        verify(mConnectivityManager)
+                .registerNetworkCallback(any(NetworkRequest.class), any(
+                        ConnectivityManager.NetworkCallback.class));
+    }
+
+    @Test
+    public void testOnViewAttachedShowsWifiStatusWhenWifiUnavailable() {
+        when(mNetworkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
+                .thenReturn(false);
+        when(mConnectivityManager.getNetworkCapabilities(any())).thenReturn(mNetworkCapabilities);
+        mController.onViewAttached();
+        verify(mView).showWifiStatus(true);
+    }
+
+    @Test
+    public void testOnViewAttachedHidesWifiStatusWhenWifiAvailable() {
+        when(mNetworkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
+                .thenReturn(true);
+        when(mConnectivityManager.getNetworkCapabilities(any())).thenReturn(mNetworkCapabilities);
+        mController.onViewAttached();
+        verify(mView).showWifiStatus(false);
+    }
+
+    @Test
+    public void testOnViewAttachedShowsWifiStatusWhenNetworkCapabilitiesUnavailable() {
+        when(mConnectivityManager.getNetworkCapabilities(any())).thenReturn(null);
+        mController.onViewAttached();
+        verify(mView).showWifiStatus(true);
+    }
+
+    @Test
+    public void testOnViewDetachedRemovesBatteryControllerCallback() {
+        mController.onViewDetached();
+        verify(mBatteryController)
+                .removeCallback(any(BatteryController.BatteryStateChangeCallback.class));
+    }
+
+    @Test
+    public void testOnViewDetachedUnregistersNetworkCallback() {
+        mController.onViewDetached();
+        verify(mConnectivityManager)
+                .unregisterNetworkCallback(any(ConnectivityManager.NetworkCallback.class));
+    }
+
+    @Test
+    public void testBatteryPercentTextShownWhenBatteryLevelChangesWhileCharging() {
+        final ArgumentCaptor<BatteryController.BatteryStateChangeCallback> callbackCapture =
+                ArgumentCaptor.forClass(BatteryController.BatteryStateChangeCallback.class);
+        mController.onViewAttached();
+        verify(mBatteryController).addCallback(callbackCapture.capture());
+        callbackCapture.getValue().onBatteryLevelChanged(1, true, true);
+        verify(mView).showBatteryPercentText(true);
+    }
+
+    @Test
+    public void testBatteryPercentTextHiddenWhenBatteryLevelChangesWhileNotCharging() {
+        final ArgumentCaptor<BatteryController.BatteryStateChangeCallback> callbackCapture =
+                ArgumentCaptor.forClass(BatteryController.BatteryStateChangeCallback.class);
+        mController.onViewAttached();
+        verify(mBatteryController).addCallback(callbackCapture.capture());
+        callbackCapture.getValue().onBatteryLevelChanged(1, true, false);
+        verify(mView).showBatteryPercentText(false);
+    }
+
+    @Test
+    public void testWifiStatusHiddenWhenWifiBecomesAvailable() {
+        // Make sure wifi starts out unavailable when onViewAttached is called.
+        when(mNetworkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
+                .thenReturn(false);
+        when(mConnectivityManager.getNetworkCapabilities(any())).thenReturn(mNetworkCapabilities);
+        mController.onViewAttached();
+
+        final ArgumentCaptor<ConnectivityManager.NetworkCallback> callbackCapture =
+                ArgumentCaptor.forClass(ConnectivityManager.NetworkCallback.class);
+        verify(mConnectivityManager).registerNetworkCallback(any(), callbackCapture.capture());
+        callbackCapture.getValue().onAvailable(mNetwork);
+        verify(mView).showWifiStatus(false);
+    }
+
+    @Test
+    public void testWifiStatusShownWhenWifiBecomesUnavailable() {
+        // Make sure wifi starts out available when onViewAttached is called.
+        when(mNetworkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
+                .thenReturn(true);
+        when(mConnectivityManager.getNetworkCapabilities(any())).thenReturn(mNetworkCapabilities);
+        mController.onViewAttached();
+
+        final ArgumentCaptor<ConnectivityManager.NetworkCallback> callbackCapture =
+                ArgumentCaptor.forClass(ConnectivityManager.NetworkCallback.class);
+        verify(mConnectivityManager).registerNetworkCallback(any(), callbackCapture.capture());
+        callbackCapture.getValue().onLost(mNetwork);
+        verify(mView).showWifiStatus(true);
+    }
+
+    @Test
+    public void testWifiStatusHiddenWhenCapabilitiesChange() {
+        // Make sure wifi starts out unavailable when onViewAttached is called.
+        when(mNetworkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
+                .thenReturn(false);
+        when(mConnectivityManager.getNetworkCapabilities(any())).thenReturn(mNetworkCapabilities);
+        mController.onViewAttached();
+
+        final ArgumentCaptor<ConnectivityManager.NetworkCallback> callbackCapture =
+                ArgumentCaptor.forClass(ConnectivityManager.NetworkCallback.class);
+        verify(mConnectivityManager).registerNetworkCallback(any(), callbackCapture.capture());
+        when(mNetworkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))
+                .thenReturn(true);
+        callbackCapture.getValue().onCapabilitiesChanged(mNetwork, mNetworkCapabilities);
+        verify(mView).showWifiStatus(false);
+    }
+}