Merge changes from topic "b147213487" into rvc-dev am: 8e726a2ef7

Change-Id: Ic8fbd04c2ae5bf57c76476639ad28dea1e560d27

core/java/android/app/Activity.java

@@ -7151,6 +7151,11 @@ public class Activity extends ContextThemeWrapper
                 writer.println(mChangingConfigurations);
         writer.print(innerPrefix); writer.print("mCurrentConfig=");
                 writer.println(mCurrentConfig);
+        if (getResources().hasOverrideDisplayAdjustments()) {
+            writer.print(innerPrefix);
+            writer.print("FixedRotationAdjustments=");
+            writer.println(getResources().getDisplayAdjustments().getFixedRotationAdjustments());
+        }
 
         mFragments.dumpLoaders(innerPrefix, fd, writer, args);
         mFragments.getFragmentManager().dump(innerPrefix, fd, writer, args);

core/java/android/app/ActivityThread.java

@@ -156,6 +156,8 @@ import android.util.proto.ProtoOutputStream;
 import android.view.Choreographer;
 import android.view.ContextThemeWrapper;
 import android.view.Display;
+import android.view.DisplayAdjustments;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
 import android.view.ThreadedRenderer;
 import android.view.View;
 import android.view.ViewDebug;
@@ -215,6 +217,7 @@ import java.util.Objects;
 import java.util.TimeZone;
 import java.util.concurrent.Executor;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Consumer;
 
 final class RemoteServiceException extends AndroidRuntimeException {
     public RemoteServiceException(String msg) {
@@ -405,6 +408,9 @@ public final class ActivityThread extends ClientTransactionHandler {
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     private final ResourcesManager mResourcesManager;
 
+    /** The active adjustments that override the {@link DisplayAdjustments} in resources. */
+    private ArrayList<Pair<IBinder, Consumer<DisplayAdjustments>>> mActiveRotationAdjustments;
+
     // Registry of remote cancellation transports pending a reply with reply handles.
     @GuardedBy("this")
     private @Nullable Map<SafeCancellationTransport, CancellationSignal> mRemoteCancellations;
@@ -541,6 +547,12 @@ public final class ActivityThread extends ClientTransactionHandler {
         @UnsupportedAppUsage
         boolean mPreserveWindow;
 
+        /**
+         * If non-null, the activity is launching with a specified rotation, the adjustments should
+         * be consumed before activity creation.
+         */
+        FixedRotationAdjustments mPendingFixedRotationAdjustments;
+
         @LifecycleState
         private int mLifecycleState = PRE_ON_CREATE;
 
@@ -557,7 +569,7 @@ public final class ActivityThread extends ClientTransactionHandler {
                 PersistableBundle persistentState, List<ResultInfo> pendingResults,
                 List<ReferrerIntent> pendingNewIntents, boolean isForward,
                 ProfilerInfo profilerInfo, ClientTransactionHandler client,
-                IBinder assistToken) {
+                IBinder assistToken, FixedRotationAdjustments fixedRotationAdjustments) {
             this.token = token;
             this.assistToken = assistToken;
             this.ident = ident;
@@ -575,6 +587,7 @@ public final class ActivityThread extends ClientTransactionHandler {
             this.overrideConfig = overrideConfig;
             this.packageInfo = client.getPackageInfoNoCheck(activityInfo.applicationInfo,
                     compatInfo);
+            mPendingFixedRotationAdjustments = fixedRotationAdjustments;
             init();
         }
 
@@ -3233,6 +3246,44 @@ public final class ActivityThread extends ClientTransactionHandler {
         sendMessage(H.CLEAN_UP_CONTEXT, cci);
     }
 
+    @Override
+    public void handleFixedRotationAdjustments(@NonNull IBinder token,
+            @Nullable FixedRotationAdjustments fixedRotationAdjustments) {
+        final Consumer<DisplayAdjustments> override = fixedRotationAdjustments != null
+                ? displayAdjustments -> displayAdjustments.setFixedRotationAdjustments(
+                        fixedRotationAdjustments)
+                : null;
+        if (!mResourcesManager.overrideTokenDisplayAdjustments(token, override)) {
+            // No resources are associated with the token.
+            return;
+        }
+        if (mActivities.get(token) == null) {
+            // Only apply the override to application for activity token because the appearance of
+            // activity is usually more sensitive to the application resources.
+            return;
+        }
+
+        // Apply the last override to application resources for compatibility. Because the Resources
+        // of Display can be from application, e.g.
+        //    applicationContext.getSystemService(DisplayManager.class).getDisplay(displayId)
+        // and the deprecated usage:
+        //    applicationContext.getSystemService(WindowManager.class).getDefaultDisplay();
+        final Consumer<DisplayAdjustments> appOverride;
+        if (mActiveRotationAdjustments == null) {
+            mActiveRotationAdjustments = new ArrayList<>(2);
+        }
+        if (override != null) {
+            mActiveRotationAdjustments.add(Pair.create(token, override));
+            appOverride = override;
+        } else {
+            mActiveRotationAdjustments.removeIf(adjustmentsPair -> adjustmentsPair.first == token);
+            appOverride = mActiveRotationAdjustments.isEmpty()
+                    ? null
+                    : mActiveRotationAdjustments.get(mActiveRotationAdjustments.size() - 1).second;
+        }
+        mInitialApplication.getResources().overrideDisplayAdjustments(appOverride);
+    }
+
     /**  Core implementation of activity launch. */
     private Activity performLaunchActivity(ActivityClientRecord r, Intent customIntent) {
         ActivityInfo aInfo = r.activityInfo;
@@ -3446,6 +3497,13 @@ public final class ActivityThread extends ClientTransactionHandler {
         ContextImpl appContext = ContextImpl.createActivityContext(
                 this, r.packageInfo, r.activityInfo, r.token, displayId, r.overrideConfig);
 
+        // The rotation adjustments must be applied before creating the activity, so the activity
+        // can get the adjusted display info during creation.
+        if (r.mPendingFixedRotationAdjustments != null) {
+            handleFixedRotationAdjustments(r.token, r.mPendingFixedRotationAdjustments);
+            r.mPendingFixedRotationAdjustments = null;
+        }
+
         final DisplayManagerGlobal dm = DisplayManagerGlobal.getInstance();
         // For debugging purposes, if the activity's package name contains the value of
         // the "debug.use-second-display" system property as a substring, then show

core/java/android/app/ClientTransactionHandler.java

@@ -25,6 +25,7 @@ import android.content.res.CompatibilityInfo;
 import android.content.res.Configuration;
 import android.os.IBinder;
 import android.util.MergedConfiguration;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.content.ReferrerIntent;
@@ -167,6 +168,10 @@ public abstract class ClientTransactionHandler {
     /** Deliver app configuration change notification. */
     public abstract void handleConfigurationChanged(Configuration config);
 
+    /** Apply addition adjustments to override display information. */
+    public abstract void handleFixedRotationAdjustments(IBinder token,
+            FixedRotationAdjustments fixedRotationAdjustments);
+
     /**
      * Get {@link android.app.ActivityThread.ActivityClientRecord} instance that corresponds to the
      * provided token.

core/java/android/app/ResourcesManager.java

@@ -59,6 +59,7 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.WeakHashMap;
+import java.util.function.Consumer;
 import java.util.function.Predicate;
 
 /** @hide */
@@ -1296,6 +1297,35 @@ public class ResourcesManager {
         }
     }
 
+    /**
+     * Overrides the display adjustments of all resources which are associated with the given token.
+     *
+     * @param token The token that owns the resources.
+     * @param override The operation to override the existing display adjustments. If it is null,
+     *                 the override adjustments will be cleared.
+     * @return {@code true} if the override takes effect.
+     */
+    public boolean overrideTokenDisplayAdjustments(IBinder token,
+            @Nullable Consumer<DisplayAdjustments> override) {
+        boolean handled = false;
+        synchronized (this) {
+            final ActivityResources tokenResources = mActivityResourceReferences.get(token);
+            if (tokenResources == null) {
+                return false;
+            }
+            final ArrayList<WeakReference<Resources>> resourcesRefs =
+                    tokenResources.activityResources;
+            for (int i = resourcesRefs.size() - 1; i >= 0; i--) {
+                final Resources res = resourcesRefs.get(i).get();
+                if (res != null) {
+                    res.overrideDisplayAdjustments(override);
+                    handled = true;
+                }
+            }
+        }
+        return handled;
+    }
+
     private class UpdateHandler implements Resources.UpdateCallbacks {
 
         /**

core/java/android/app/servertransaction/FixedRotationAdjustmentsItem.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 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 android.app.servertransaction;
+
+import android.app.ClientTransactionHandler;
+import android.os.IBinder;
+import android.os.Parcel;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
+
+import java.util.Objects;
+
+/**
+ * The request to update display adjustments for a rotated activity or window token.
+ * @hide
+ */
+public class FixedRotationAdjustmentsItem extends ClientTransactionItem {
+
+    /** The token who may have {@link android.content.res.Resources}. */
+    private IBinder mToken;
+
+    /**
+     * The adjustments for the display adjustments of resources. If it is null, the existing
+     * rotation adjustments will be dropped to restore natural state.
+     */
+    private FixedRotationAdjustments mFixedRotationAdjustments;
+
+    private FixedRotationAdjustmentsItem() {}
+
+    /** Obtain an instance initialized with provided params. */
+    public static FixedRotationAdjustmentsItem obtain(IBinder token,
+            FixedRotationAdjustments fixedRotationAdjustments) {
+        FixedRotationAdjustmentsItem instance =
+                ObjectPool.obtain(FixedRotationAdjustmentsItem.class);
+        if (instance == null) {
+            instance = new FixedRotationAdjustmentsItem();
+        }
+        instance.mToken = token;
+        instance.mFixedRotationAdjustments = fixedRotationAdjustments;
+
+        return instance;
+    }
+
+    @Override
+    public void execute(ClientTransactionHandler client, IBinder token,
+            PendingTransactionActions pendingActions) {
+        client.handleFixedRotationAdjustments(mToken, mFixedRotationAdjustments);
+    }
+
+    @Override
+    public void recycle() {
+        mToken = null;
+        mFixedRotationAdjustments = null;
+        ObjectPool.recycle(this);
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeStrongBinder(mToken);
+        dest.writeTypedObject(mFixedRotationAdjustments, flags);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        final FixedRotationAdjustmentsItem other = (FixedRotationAdjustmentsItem) o;
+        return Objects.equals(mToken, other.mToken)
+                && Objects.equals(mFixedRotationAdjustments, other.mFixedRotationAdjustments);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = 17;
+        result = 31 * result + Objects.hashCode(mToken);
+        result = 31 * result + Objects.hashCode(mFixedRotationAdjustments);
+        return result;
+    }
+
+    private FixedRotationAdjustmentsItem(Parcel in) {
+        mToken = in.readStrongBinder();
+        mFixedRotationAdjustments = in.readTypedObject(FixedRotationAdjustments.CREATOR);
+    }
+
+    public static final Creator<FixedRotationAdjustmentsItem> CREATOR =
+            new Creator<FixedRotationAdjustmentsItem>() {
+        public FixedRotationAdjustmentsItem createFromParcel(Parcel in) {
+            return new FixedRotationAdjustmentsItem(in);
+        }
+
+        public FixedRotationAdjustmentsItem[] newArray(int size) {
+            return new FixedRotationAdjustmentsItem[size];
+        }
+    };
+}

core/java/android/app/servertransaction/LaunchActivityItem.java

@@ -33,6 +33,7 @@ import android.os.IBinder;
 import android.os.Parcel;
 import android.os.PersistableBundle;
 import android.os.Trace;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
 
 import com.android.internal.app.IVoiceInteractor;
 import com.android.internal.content.ReferrerIntent;
@@ -64,6 +65,7 @@ public class LaunchActivityItem extends ClientTransactionItem {
     private boolean mIsForward;
     private ProfilerInfo mProfilerInfo;
     private IBinder mAssistToken;
+    private FixedRotationAdjustments mFixedRotationAdjustments;
 
     @Override
     public void preExecute(ClientTransactionHandler client, IBinder token) {
@@ -79,7 +81,7 @@ public class LaunchActivityItem extends ClientTransactionItem {
         ActivityClientRecord r = new ActivityClientRecord(token, mIntent, mIdent, mInfo,
                 mOverrideConfig, mCompatInfo, mReferrer, mVoiceInteractor, mState, mPersistentState,
                 mPendingResults, mPendingNewIntents, mIsForward,
-                mProfilerInfo, client, mAssistToken);
+                mProfilerInfo, client, mAssistToken, mFixedRotationAdjustments);
         client.handleLaunchActivity(r, pendingActions, null /* customIntent */);
         Trace.traceEnd(TRACE_TAG_ACTIVITY_MANAGER);
     }
@@ -101,14 +103,14 @@ public class LaunchActivityItem extends ClientTransactionItem {
             String referrer, IVoiceInteractor voiceInteractor, int procState, Bundle state,
             PersistableBundle persistentState, List<ResultInfo> pendingResults,
             List<ReferrerIntent> pendingNewIntents, boolean isForward, ProfilerInfo profilerInfo,
-            IBinder assistToken) {
+            IBinder assistToken, FixedRotationAdjustments fixedRotationAdjustments) {
         LaunchActivityItem instance = ObjectPool.obtain(LaunchActivityItem.class);
         if (instance == null) {
             instance = new LaunchActivityItem();
         }
         setValues(instance, intent, ident, info, curConfig, overrideConfig, compatInfo, referrer,
                 voiceInteractor, procState, state, persistentState, pendingResults,
-                pendingNewIntents, isForward, profilerInfo, assistToken);
+                pendingNewIntents, isForward, profilerInfo, assistToken, fixedRotationAdjustments);
 
         return instance;
     }
@@ -116,7 +118,7 @@ public class LaunchActivityItem extends ClientTransactionItem {
     @Override
     public void recycle() {
         setValues(this, null, 0, null, null, null, null, null, null, 0, null, null, null, null,
-                false, null, null);
+                false, null, null, null);
         ObjectPool.recycle(this);
     }
 
@@ -142,6 +144,7 @@ public class LaunchActivityItem extends ClientTransactionItem {
         dest.writeBoolean(mIsForward);
         dest.writeTypedObject(mProfilerInfo, flags);
         dest.writeStrongBinder(mAssistToken);
+        dest.writeTypedObject(mFixedRotationAdjustments, flags);
     }
 
     /** Read from Parcel. */
@@ -156,7 +159,8 @@ public class LaunchActivityItem extends ClientTransactionItem {
                 in.createTypedArrayList(ResultInfo.CREATOR),
                 in.createTypedArrayList(ReferrerIntent.CREATOR), in.readBoolean(),
                 in.readTypedObject(ProfilerInfo.CREATOR),
-                in.readStrongBinder());
+                in.readStrongBinder(),
+                in.readTypedObject(FixedRotationAdjustments.CREATOR));
     }
 
     public static final @android.annotation.NonNull Creator<LaunchActivityItem> CREATOR =
@@ -192,7 +196,8 @@ public class LaunchActivityItem extends ClientTransactionItem {
                 && Objects.equals(mPendingNewIntents, other.mPendingNewIntents)
                 && mIsForward == other.mIsForward
                 && Objects.equals(mProfilerInfo, other.mProfilerInfo)
-                && Objects.equals(mAssistToken, other.mAssistToken);
+                && Objects.equals(mAssistToken, other.mAssistToken)
+                && Objects.equals(mFixedRotationAdjustments, other.mFixedRotationAdjustments);
     }
 
     @Override
@@ -212,6 +217,7 @@ public class LaunchActivityItem extends ClientTransactionItem {
         result = 31 * result + (mIsForward ? 1 : 0);
         result = 31 * result + Objects.hashCode(mProfilerInfo);
         result = 31 * result + Objects.hashCode(mAssistToken);
+        result = 31 * result + Objects.hashCode(mFixedRotationAdjustments);
         return result;
     }
 
@@ -247,7 +253,7 @@ public class LaunchActivityItem extends ClientTransactionItem {
                 + ",referrer=" + mReferrer + ",procState=" + mProcState + ",state=" + mState
                 + ",persistentState=" + mPersistentState + ",pendingResults=" + mPendingResults
                 + ",pendingNewIntents=" + mPendingNewIntents + ",profilerInfo=" + mProfilerInfo
-                + " assistToken=" + mAssistToken
+                + ",assistToken=" + mAssistToken + ",rotationAdj=" + mFixedRotationAdjustments
                 + "}";
     }
 
@@ -257,7 +263,8 @@ public class LaunchActivityItem extends ClientTransactionItem {
             CompatibilityInfo compatInfo, String referrer, IVoiceInteractor voiceInteractor,
             int procState, Bundle state, PersistableBundle persistentState,
             List<ResultInfo> pendingResults, List<ReferrerIntent> pendingNewIntents,
-            boolean isForward, ProfilerInfo profilerInfo, IBinder assistToken) {
+            boolean isForward, ProfilerInfo profilerInfo, IBinder assistToken,
+            FixedRotationAdjustments fixedRotationAdjustments) {
         instance.mIntent = intent;
         instance.mIdent = ident;
         instance.mInfo = info;
@@ -274,5 +281,6 @@ public class LaunchActivityItem extends ClientTransactionItem {
         instance.mIsForward = isForward;
         instance.mProfilerInfo = profilerInfo;
         instance.mAssistToken = assistToken;
+        instance.mFixedRotationAdjustments = fixedRotationAdjustments;
     }
 }

core/java/android/content/res/Resources.java

@@ -81,6 +81,7 @@ import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.function.Consumer;
 
 /**
  * Class for accessing an application's resources.  This sits on top of the
@@ -140,6 +141,9 @@ public class Resources {
     @UnsupportedAppUsage
     private DrawableInflater mDrawableInflater;
 
+    /** Used to override the returned adjustments of {@link #getDisplayAdjustments}. */
+    private DisplayAdjustments mOverrideDisplayAdjustments;
+
     /** Lock object used to protect access to {@link #mTmpValue}. */
     private final Object mTmpValueLock = new Object();
 
@@ -2055,9 +2059,40 @@ public class Resources {
     /** @hide */
     @UnsupportedAppUsage
     public DisplayAdjustments getDisplayAdjustments() {
+        final DisplayAdjustments overrideDisplayAdjustments = mOverrideDisplayAdjustments;
+        if (overrideDisplayAdjustments != null) {
+            return overrideDisplayAdjustments;
+        }
         return mResourcesImpl.getDisplayAdjustments();
     }
 
+    /**
+     * Customize the display adjustments based on the current one in {@link #mResourcesImpl}, in
+     * order to isolate the effect with other instances of {@link Resource} that may share the same
+     * instance of {@link ResourcesImpl}.
+     *
+     * @param override The operation to override the existing display adjustments. If it is null,
+     *                 the override adjustments will be cleared.
+     * @hide
+     */
+    public void overrideDisplayAdjustments(@Nullable Consumer<DisplayAdjustments> override) {
+        if (override != null) {
+            mOverrideDisplayAdjustments = new DisplayAdjustments(
+                    mResourcesImpl.getDisplayAdjustments());
+            override.accept(mOverrideDisplayAdjustments);
+        } else {
+            mOverrideDisplayAdjustments = null;
+        }
+    }
+
+    /**
+     * Return {@code true} if the override display adjustments have been set.
+     * @hide
+     */
+    public boolean hasOverrideDisplayAdjustments() {
+        return mOverrideDisplayAdjustments != null;
+    }
+
     /**
      * Return the current configuration that is in effect for this resource 
      * object.  The returned object should be treated as read-only.

core/java/android/view/Display.java

@@ -103,6 +103,14 @@ public final class Display {
     private int mCachedAppWidthCompat;
     private int mCachedAppHeightCompat;
 
+    /**
+     * Indicates that the application is started in a different rotation than the real display, so
+     * the display information may be adjusted. That ensures the methods {@link #getRotation},
+     * {@link #getRealSize}, {@link #getRealMetrics}, and {@link #getCutout} are consistent with how
+     * the application window is laid out.
+     */
+    private boolean mMayAdjustByFixedRotation;
+
     /**
      * The default Display id, which is the id of the primary display assuming there is one.
      */
@@ -804,7 +812,9 @@ public final class Display {
     public int getRotation() {
         synchronized (this) {
             updateDisplayInfoLocked();
-            return mDisplayInfo.rotation;
+            return mMayAdjustByFixedRotation
+                    ? getDisplayAdjustments().getRotation(mDisplayInfo.rotation)
+                    : mDisplayInfo.rotation;
         }
     }
 
@@ -828,7 +838,9 @@ public final class Display {
     public DisplayCutout getCutout() {
         synchronized (this) {
             updateDisplayInfoLocked();
-            return mDisplayInfo.displayCutout;
+            return mMayAdjustByFixedRotation
+                    ? getDisplayAdjustments().getDisplayCutout(mDisplayInfo.displayCutout)
+                    : mDisplayInfo.displayCutout;
         }
     }
 
@@ -1140,6 +1152,9 @@ public final class Display {
             updateDisplayInfoLocked();
             outSize.x = mDisplayInfo.logicalWidth;
             outSize.y = mDisplayInfo.logicalHeight;
+            if (mMayAdjustByFixedRotation) {
+                getDisplayAdjustments().adjustSize(outSize, mDisplayInfo.rotation);
+            }
         }
     }
 
@@ -1159,6 +1174,9 @@ public final class Display {
             updateDisplayInfoLocked();
             mDisplayInfo.getLogicalMetrics(outMetrics,
                     CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO, null);
+            if (mMayAdjustByFixedRotation) {
+                getDisplayAdjustments().adjustMetrics(outMetrics, mDisplayInfo.rotation);
+            }
         }
     }
 
@@ -1225,6 +1243,9 @@ public final class Display {
                 }
             }
         }
+
+        mMayAdjustByFixedRotation = mResources != null
+                && mResources.hasOverrideDisplayAdjustments();
     }
 
     private void updateCachedAppSizeIfNeededLocked() {
@@ -1243,9 +1264,12 @@ public final class Display {
     public String toString() {
         synchronized (this) {
             updateDisplayInfoLocked();
-            mDisplayInfo.getAppMetrics(mTempMetrics, getDisplayAdjustments());
+            final DisplayAdjustments adjustments = getDisplayAdjustments();
+            mDisplayInfo.getAppMetrics(mTempMetrics, adjustments);
             return "Display id " + mDisplayId + ": " + mDisplayInfo
-                    + ", " + mTempMetrics + ", isValid=" + mIsValid;
+                    + (mMayAdjustByFixedRotation
+                            ? (", " + adjustments.getFixedRotationAdjustments() + ", ") : ", ")
+                    + mTempMetrics + ", isValid=" + mIsValid;
         }
     }
 

core/java/android/view/DisplayAdjustments.java

@@ -21,6 +21,10 @@ import android.annotation.Nullable;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.CompatibilityInfo;
 import android.content.res.Configuration;
+import android.graphics.Point;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.DisplayMetrics;
 
 import java.util.Objects;
 
@@ -30,6 +34,7 @@ public class DisplayAdjustments {
 
     private volatile CompatibilityInfo mCompatInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;
     private final Configuration mConfiguration = new Configuration(Configuration.EMPTY);
+    private FixedRotationAdjustments mFixedRotationAdjustments;
 
     @UnsupportedAppUsage
     public DisplayAdjustments() {
@@ -44,6 +49,7 @@ public class DisplayAdjustments {
     public DisplayAdjustments(@NonNull DisplayAdjustments daj) {
         setCompatibilityInfo(daj.mCompatInfo);
         mConfiguration.setTo(daj.getConfiguration());
+        mFixedRotationAdjustments = daj.mFixedRotationAdjustments;
     }
 
     @UnsupportedAppUsage
@@ -84,11 +90,78 @@ public class DisplayAdjustments {
         return mConfiguration;
     }
 
+    public void setFixedRotationAdjustments(FixedRotationAdjustments fixedRotationAdjustments) {
+        mFixedRotationAdjustments = fixedRotationAdjustments;
+    }
+
+    public FixedRotationAdjustments getFixedRotationAdjustments() {
+        return mFixedRotationAdjustments;
+    }
+
+    /** Returns {@code false} if the width and height of display should swap. */
+    private boolean noFlip(@Surface.Rotation int realRotation) {
+        final FixedRotationAdjustments rotationAdjustments = mFixedRotationAdjustments;
+        if (rotationAdjustments == null) {
+            return true;
+        }
+        // Check if the delta is rotated by 90 degrees.
+        return (realRotation - rotationAdjustments.mRotation + 4) % 2 == 0;
+    }
+
+    /** Adjusts the given size if possible. */
+    public void adjustSize(@NonNull Point size, @Surface.Rotation int realRotation) {
+        if (noFlip(realRotation)) {
+            return;
+        }
+        final int w = size.x;
+        size.x = size.y;
+        size.y = w;
+    }
+
+    /** Adjusts the given metrics if possible. */
+    public void adjustMetrics(@NonNull DisplayMetrics metrics, @Surface.Rotation int realRotation) {
+        if (noFlip(realRotation)) {
+            return;
+        }
+        int w = metrics.widthPixels;
+        metrics.widthPixels = metrics.heightPixels;
+        metrics.heightPixels = w;
+
+        w = metrics.noncompatWidthPixels;
+        metrics.noncompatWidthPixels = metrics.noncompatHeightPixels;
+        metrics.noncompatHeightPixels = w;
+
+        float x = metrics.xdpi;
+        metrics.xdpi = metrics.ydpi;
+        metrics.ydpi = x;
+
+        x = metrics.noncompatXdpi;
+        metrics.noncompatXdpi = metrics.noncompatYdpi;
+        metrics.noncompatYdpi = x;
+    }
+
+    /** Returns the adjusted cutout if available. Otherwise the original cutout is returned. */
+    @Nullable
+    public DisplayCutout getDisplayCutout(@Nullable DisplayCutout realCutout) {
+        final FixedRotationAdjustments rotationAdjustments = mFixedRotationAdjustments;
+        return rotationAdjustments != null && rotationAdjustments.mRotatedDisplayCutout != null
+                ? rotationAdjustments.mRotatedDisplayCutout
+                : realCutout;
+    }
+
+    /** Returns the adjusted rotation if available. Otherwise the original rotation is returned. */
+    @Surface.Rotation
+    public int getRotation(@Surface.Rotation int realRotation) {
+        final FixedRotationAdjustments rotationAdjustments = mFixedRotationAdjustments;
+        return rotationAdjustments != null ? rotationAdjustments.mRotation : realRotation;
+    }
+
     @Override
     public int hashCode() {
         int hash = 17;
         hash = hash * 31 + Objects.hashCode(mCompatInfo);
         hash = hash * 31 + Objects.hashCode(mConfiguration);
+        hash = hash * 31 + Objects.hashCode(mFixedRotationAdjustments);
         return hash;
     }
 
@@ -98,7 +171,82 @@ public class DisplayAdjustments {
             return false;
         }
         DisplayAdjustments daj = (DisplayAdjustments)o;
-        return Objects.equals(daj.mCompatInfo, mCompatInfo) &&
-                Objects.equals(daj.mConfiguration, mConfiguration);
+        return Objects.equals(daj.mCompatInfo, mCompatInfo)
+                && Objects.equals(daj.mConfiguration, mConfiguration)
+                && Objects.equals(daj.mFixedRotationAdjustments, mFixedRotationAdjustments);
+    }
+
+    /**
+     * An application can be launched in different rotation than the real display. This class
+     * provides the information to adjust the values returned by {@link #Display}.
+     * @hide
+     */
+    public static class FixedRotationAdjustments implements Parcelable {
+        /** The application-based rotation. */
+        @Surface.Rotation
+        final int mRotation;
+
+        /** Non-null if the device has cutout. */
+        @Nullable
+        final DisplayCutout mRotatedDisplayCutout;
+
+        public FixedRotationAdjustments(@Surface.Rotation int rotation, DisplayCutout cutout) {
+            mRotation = rotation;
+            mRotatedDisplayCutout = cutout;
+        }
+
+        @Override
+        public int hashCode() {
+            int hash = 17;
+            hash = hash * 31 + mRotation;
+            hash = hash * 31 + Objects.hashCode(mRotatedDisplayCutout);
+            return hash;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (!(o instanceof FixedRotationAdjustments)) {
+                return false;
+            }
+            final FixedRotationAdjustments other = (FixedRotationAdjustments) o;
+            return mRotation == other.mRotation
+                    && Objects.equals(mRotatedDisplayCutout, other.mRotatedDisplayCutout);
+        }
+
+        @Override
+        public String toString() {
+            return "FixedRotationAdjustments{rotation=" + Surface.rotationToString(mRotation)
+                    + " cutout=" + mRotatedDisplayCutout + "}";
+        }
+
+        @Override
+        public int describeContents() {
+            return 0;
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            dest.writeInt(mRotation);
+            dest.writeTypedObject(
+                    new DisplayCutout.ParcelableWrapper(mRotatedDisplayCutout), flags);
+        }
+
+        private FixedRotationAdjustments(Parcel in) {
+            mRotation = in.readInt();
+            final DisplayCutout.ParcelableWrapper cutoutWrapper =
+                    in.readTypedObject(DisplayCutout.ParcelableWrapper.CREATOR);
+            mRotatedDisplayCutout = cutoutWrapper != null ? cutoutWrapper.get() : null;
+        }
+
+        public static final Creator<FixedRotationAdjustments> CREATOR =
+                new Creator<FixedRotationAdjustments>() {
+            public FixedRotationAdjustments createFromParcel(Parcel in) {
+                return new FixedRotationAdjustments(in);
+            }
+
+            public FixedRotationAdjustments[] newArray(int size) {
+                return new FixedRotationAdjustments[size];
+            }
+        };
     }
 }

core/tests/coretests/src/android/app/servertransaction/ObjectPoolTests.java

@@ -144,11 +144,12 @@ public class ObjectPoolTests {
         IBinder assistToken = new Binder();
 
         LaunchActivityItem emptyItem = LaunchActivityItem.obtain(null, 0, null, null, null, null,
-                null, null, 0, null, null, null, null, false, null, null);
+                null, null, 0, null, null, null, null, false, null, null, null);
         LaunchActivityItem item = LaunchActivityItem.obtain(intent, ident, activityInfo,
                 config(), overrideConfig, compat, referrer, null /* voiceInteractor */,
                 procState, bundle, persistableBundle, resultInfoList(), referrerIntentList(),
-                true /* isForward */, null /* profilerInfo */, assistToken);
+                true /* isForward */, null /* profilerInfo */, assistToken,
+                null /* fixedRotationAdjustments */);
         assertNotSame(item, emptyItem);
         assertFalse(item.equals(emptyItem));
 
@@ -158,7 +159,8 @@ public class ObjectPoolTests {
         LaunchActivityItem item2 = LaunchActivityItem.obtain(intent, ident, activityInfo,
                 config(), overrideConfig, compat, referrer, null /* voiceInteractor */,
                 procState, bundle, persistableBundle, resultInfoList(), referrerIntentList(),
-                true /* isForward */, null /* profilerInfo */, assistToken);
+                true /* isForward */, null /* profilerInfo */, assistToken,
+                null /* fixedRotationAdjustments */);
         assertSame(item, item2);
         assertFalse(item2.equals(emptyItem));
     }

core/tests/coretests/src/android/app/servertransaction/TransactionExecutorTests.java

@@ -267,7 +267,7 @@ public class TransactionExecutorTests {
                 null /* voiceInteractor */, 0 /* procState */, null /* state */,
                 null /* persistentState */, null /* pendingResults */,
                 null /* pendingNewIntents */, false /* isForward */, null /* profilerInfo */,
-                null /* assistToken*/));
+                null /* assistToken */, null /* fixedRotationAdjustments */));
         launchTransaction.addCallback(launchItem);
         mExecutor.execute(launchTransaction);
 

core/tests/coretests/src/android/app/servertransaction/TransactionParcelTests.java

@@ -52,6 +52,9 @@ import android.os.PersistableBundle;
 import android.os.RemoteCallback;
 import android.os.RemoteException;
 import android.platform.test.annotations.Presubmit;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
+import android.view.DisplayCutout;
+import android.view.Surface;
 
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
@@ -187,11 +190,14 @@ public class TransactionParcelTests {
         bundle.putParcelable("data", new ParcelableData(1));
         PersistableBundle persistableBundle = new PersistableBundle();
         persistableBundle.putInt("k", 4);
+        FixedRotationAdjustments fixedRotationAdjustments = new FixedRotationAdjustments(
+                Surface.ROTATION_90, DisplayCutout.NO_CUTOUT);
 
         LaunchActivityItem item = LaunchActivityItem.obtain(intent, ident, activityInfo,
                 config(), overrideConfig, compat, referrer, null /* voiceInteractor */,
                 procState, bundle, persistableBundle, resultInfoList(), referrerIntentList(),
-                true /* isForward */, null /* profilerInfo */, new Binder());
+                true /* isForward */, null /* profilerInfo */, new Binder(),
+                fixedRotationAdjustments);
         writeAndPrepareForReading(item);
 
         // Read from parcel and assert
@@ -340,6 +346,22 @@ public class TransactionParcelTests {
         assertTrue(transaction.equals(result));
     }
 
+    @Test
+    public void testFixedRotationAdjustments() {
+        ClientTransaction transaction = ClientTransaction.obtain(new StubAppThread(),
+                null /* activityToken */);
+        transaction.addCallback(FixedRotationAdjustmentsItem.obtain(new Binder(),
+                new FixedRotationAdjustments(Surface.ROTATION_270, DisplayCutout.NO_CUTOUT)));
+
+        writeAndPrepareForReading(transaction);
+
+        // Read from parcel and assert
+        ClientTransaction result = ClientTransaction.CREATOR.createFromParcel(mParcel);
+
+        assertEquals(transaction.hashCode(), result.hashCode());
+        assertTrue(transaction.equals(result));
+    }
+
     /** Write to {@link #mParcel} and reset its position to prepare for reading from the start. */
     private void writeAndPrepareForReading(Parcelable parcelable) {
         parcelable.writeToParcel(mParcel, 0 /* flags */);

core/tests/coretests/src/android/content/res/ResourcesManagerTest.java

@@ -259,4 +259,35 @@ public class ResourcesManagerTest extends TestCase {
         expectedConfig2.orientation = Configuration.ORIENTATION_LANDSCAPE;
         assertEquals(expectedConfig2, resources2.getConfiguration());
     }
+
+    @SmallTest
+    public void testOverrideDisplayAdjustments() {
+        final int originalOverrideDensity = 200;
+        final int overrideDisplayDensity = 400;
+        final Binder token = new Binder();
+        final Configuration overrideConfig = new Configuration();
+        overrideConfig.densityDpi = originalOverrideDensity;
+        final Resources resources = mResourcesManager.createBaseTokenResources(
+                token, APP_ONE_RES_DIR, null /* splitResDirs */, null /* overlayDirs */,
+                null /* libDirs */, Display.DEFAULT_DISPLAY, overrideConfig,
+                CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO, null /* classLoader */,
+                null /* loaders */);
+
+        // Update the override.
+        boolean handled = mResourcesManager.overrideTokenDisplayAdjustments(token,
+                adjustments -> adjustments.getConfiguration().densityDpi = overrideDisplayDensity);
+
+        assertTrue(handled);
+        assertTrue(resources.hasOverrideDisplayAdjustments());
+        assertEquals(overrideDisplayDensity,
+                resources.getDisplayAdjustments().getConfiguration().densityDpi);
+
+        // Clear the override.
+        handled = mResourcesManager.overrideTokenDisplayAdjustments(token, null /* override */);
+
+        assertTrue(handled);
+        assertFalse(resources.hasOverrideDisplayAdjustments());
+        assertEquals(originalOverrideDensity,
+                resources.getDisplayAdjustments().getConfiguration().densityDpi);
+    }
 }

core/tests/coretests/src/android/view/DisplayAdjustmentsTests.java

@@ -19,6 +19,9 @@ package android.view;
 import static org.junit.Assert.assertEquals;
 
 import android.content.res.Configuration;
+import android.graphics.Point;
+import android.util.DisplayMetrics;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 
@@ -67,4 +70,38 @@ public class DisplayAdjustmentsTests {
 
         assertEquals(configuration, newAdjustments.getConfiguration());
     }
+
+    @Test
+    public void testFixedRotationAdjustments() {
+        final DisplayAdjustments mDisplayAdjustments = new DisplayAdjustments();
+        final int realRotation = Surface.ROTATION_0;
+        final int fixedRotation = Surface.ROTATION_90;
+
+        mDisplayAdjustments.setFixedRotationAdjustments(
+                new FixedRotationAdjustments(fixedRotation, null /* cutout */));
+
+        final int w = 1000;
+        final int h = 2000;
+        final Point size = new Point(w, h);
+        mDisplayAdjustments.adjustSize(size, realRotation);
+
+        assertEquals(fixedRotation, mDisplayAdjustments.getRotation(realRotation));
+        assertEquals(new Point(h, w), size);
+
+        final DisplayMetrics metrics = new DisplayMetrics();
+        metrics.xdpi = metrics.noncompatXdpi = w;
+        metrics.widthPixels = metrics.noncompatWidthPixels = w;
+        metrics.ydpi = metrics.noncompatYdpi = h;
+        metrics.heightPixels = metrics.noncompatHeightPixels = h;
+
+        final DisplayMetrics flippedMetrics = new DisplayMetrics();
+        flippedMetrics.xdpi = flippedMetrics.noncompatXdpi = h;
+        flippedMetrics.widthPixels = flippedMetrics.noncompatWidthPixels = h;
+        flippedMetrics.ydpi = flippedMetrics.noncompatYdpi = w;
+        flippedMetrics.heightPixels = flippedMetrics.noncompatHeightPixels = w;
+
+        mDisplayAdjustments.adjustMetrics(metrics, realRotation);
+
+        assertEquals(flippedMetrics, metrics);
+    }
 }

core/tests/mockingcoretests/src/android/app/activity/ActivityThreadClientTest.java

@@ -225,7 +225,8 @@ public class ActivityThreadClientTest {
                     CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO, null /* referrer */,
                     null /* voiceInteractor */, null /* state */, null /* persistentState */,
                     null /* pendingResults */, null /* pendingNewIntents */, true /* isForward */,
-                    null /* profilerInfo */,  mThread /* client */, null /* asssitToken */);
+                    null /* profilerInfo */,  mThread /* client */, null /* asssitToken */,
+                    null /* fixedRotationAdjustments */);
         }
 
         @Override

services/core/java/com/android/server/wm/ActivityStackSupervisor.java

@@ -842,7 +842,7 @@ public class ActivityStackSupervisor implements RecentTasks.Callbacks {
                         r.launchedFromPackage, task.voiceInteractor, proc.getReportedProcState(),
                         r.getSavedState(), r.getPersistentSavedState(), results, newIntents,
                         dc.isNextTransitionForward(), proc.createProfilerInfoIfNeeded(),
-                                r.assistToken));
+                        r.assistToken, r.createFixedRotationAdjustmentsIfNeeded()));
 
                 // Set desired final state.
                 final ActivityLifecycleItem lifecycleItem;

services/core/java/com/android/server/wm/WindowToken.java

@@ -19,6 +19,7 @@ package com.android.server.wm;
 import static android.os.Process.INVALID_UID;
 import static android.view.Display.INVALID_DISPLAY;
 import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
+import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
 import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
 import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR;
 
@@ -40,6 +41,7 @@ import static com.android.server.wm.WindowTokenProto.WINDOW_CONTAINER;
 
 import android.annotation.CallSuper;
 import android.app.IWindowToken;
+import android.app.servertransaction.FixedRotationAdjustmentsItem;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.os.Debug;
@@ -47,6 +49,7 @@ import android.os.IBinder;
 import android.os.RemoteException;
 import android.util.Slog;
 import android.util.proto.ProtoOutputStream;
+import android.view.DisplayAdjustments.FixedRotationAdjustments;
 import android.view.DisplayInfo;
 import android.view.InsetsState;
 import android.view.SurfaceControl;
@@ -529,6 +532,7 @@ class WindowToken extends WindowContainer<WindowState> {
         mFixedRotationTransformState = new FixedRotationTransformState(info, displayFrames,
                 insetsState, new Configuration(config), mDisplayContent.getRotation());
         onConfigurationChanged(getParent().getConfiguration());
+        notifyFixedRotationTransform(true /* enabled */);
     }
 
     /**
@@ -546,6 +550,7 @@ class WindowToken extends WindowContainer<WindowState> {
         mFixedRotationTransformState = fixedRotationState;
         fixedRotationState.mAssociatedTokens.add(this);
         onConfigurationChanged(getParent().getConfiguration());
+        notifyFixedRotationTransform(true /* enabled */);
     }
 
     void finishFixedRotationTransform() {
@@ -578,9 +583,52 @@ class WindowToken extends WindowContainer<WindowState> {
         // The state is cleared at the end, because it is used to indicate that other windows can
         // use seamless rotation when applying rotation to display.
         for (int i = state.mAssociatedTokens.size() - 1; i >= 0; i--) {
-            state.mAssociatedTokens.get(i).mFixedRotationTransformState = null;
+            state.mAssociatedTokens.get(i).cleanUpFixedRotationTransformState();
         }
+        cleanUpFixedRotationTransformState();
+    }
+
+    private void cleanUpFixedRotationTransformState() {
         mFixedRotationTransformState = null;
+        notifyFixedRotationTransform(false /* enabled */);
+    }
+
+    /** Notifies application side to enable or disable the rotation adjustment of display info. */
+    private void notifyFixedRotationTransform(boolean enabled) {
+        FixedRotationAdjustments adjustments = null;
+        // A token may contain windows of the same processes or different processes. The list is
+        // used to avoid sending the same adjustments to a process multiple times.
+        ArrayList<WindowProcessController> notifiedProcesses = null;
+        for (int i = mChildren.size() - 1; i >= 0; i--) {
+            final WindowState w = mChildren.get(i);
+            final WindowProcessController app;
+            if (w.mAttrs.type == TYPE_APPLICATION_STARTING) {
+                // Use the host activity because starting window is controlled by window manager.
+                final ActivityRecord r = asActivityRecord();
+                if (r == null) {
+                    continue;
+                }
+                app = r.app;
+            } else {
+                app = mWmService.mAtmService.mProcessMap.getProcess(w.mSession.mPid);
+            }
+            if (app == null || !app.hasThread()) {
+                continue;
+            }
+            if (notifiedProcesses == null) {
+                notifiedProcesses = new ArrayList<>(2);
+                adjustments = enabled ? createFixedRotationAdjustmentsIfNeeded() : null;
+            } else if (notifiedProcesses.contains(app)) {
+                continue;
+            }
+            notifiedProcesses.add(app);
+            try {
+                mWmService.mAtmService.getLifecycleManager().scheduleTransaction(
+                        app.getThread(), FixedRotationAdjustmentsItem.obtain(token, adjustments));
+            } catch (RemoteException e) {
+                Slog.w(TAG, "Failed to schedule DisplayAdjustmentsItem to " + app, e);
+            }
+        }
     }
 
     /** Restores the changes that applies to this container. */
@@ -590,6 +638,7 @@ class WindowToken extends WindowContainer<WindowState> {
             // The window may be detached or detaching.
             return;
         }
+        notifyFixedRotationTransform(false /* enabled */);
         final int originalRotation = getWindowConfiguration().getRotation();
         onConfigurationChanged(parent.getConfiguration());
         onCancelFixedRotationTransform(originalRotation);
@@ -603,6 +652,14 @@ class WindowToken extends WindowContainer<WindowState> {
     void onCancelFixedRotationTransform(int originalDisplayRotation) {
     }
 
+    FixedRotationAdjustments createFixedRotationAdjustmentsIfNeeded() {
+        if (!isFixedRotationTransforming()) {
+            return null;
+        }
+        return new FixedRotationAdjustments(mFixedRotationTransformState.mDisplayInfo.rotation,
+                mFixedRotationTransformState.mDisplayInfo.displayCutout);
+    }
+
     @Override
     void resolveOverrideConfiguration(Configuration newParentConfig) {
         super.resolveOverrideConfiguration(newParentConfig);