Add a unique ID to a virtual device.

This will be used in a later CL to allow virtual displays to be
associated with their virtual device.

Bug: 205343547
Test: atest VirtualDeviceManagerServiceTest

Change-Id: Ibbf5a8c834d5d7a7bac4816a0ea151adad4e7ea7

core/api/system-current.txt

@@ -2789,6 +2789,8 @@ package android.companion.virtual {
 
   public final class VirtualDeviceManager {
     method @NonNull @RequiresPermission(android.Manifest.permission.CREATE_VIRTUAL_DEVICE) public android.companion.virtual.VirtualDeviceManager.VirtualDevice createVirtualDevice(int, @NonNull android.companion.virtual.VirtualDeviceParams);
+    field public static final int DEFAULT_DEVICE_ID = 0; // 0x0
+    field public static final int INVALID_DEVICE_ID = -1; // 0xffffffff
     field public static final int LAUNCH_FAILURE_NO_ACTIVITY = 2; // 0x2
     field public static final int LAUNCH_FAILURE_PENDING_INTENT_CANCELED = 1; // 0x1
     field public static final int LAUNCH_SUCCESS = 0; // 0x0
@@ -2808,6 +2810,7 @@ package android.companion.virtual {
     method @NonNull @RequiresPermission(android.Manifest.permission.CREATE_VIRTUAL_DEVICE) public android.hardware.input.VirtualKeyboard createVirtualKeyboard(@NonNull android.hardware.display.VirtualDisplay, @NonNull String, int, int);
     method @NonNull @RequiresPermission(android.Manifest.permission.CREATE_VIRTUAL_DEVICE) public android.hardware.input.VirtualMouse createVirtualMouse(@NonNull android.hardware.display.VirtualDisplay, @NonNull String, int, int);
     method @NonNull @RequiresPermission(android.Manifest.permission.CREATE_VIRTUAL_DEVICE) public android.hardware.input.VirtualTouchscreen createVirtualTouchscreen(@NonNull android.hardware.display.VirtualDisplay, @NonNull String, int, int);
+    method public int getDeviceId();
     method public void launchPendingIntent(int, @NonNull android.app.PendingIntent, @NonNull java.util.concurrent.Executor, @NonNull java.util.function.IntConsumer);
     method public void removeActivityListener(@NonNull android.companion.virtual.VirtualDeviceManager.ActivityListener);
     method @NonNull @RequiresPermission(android.Manifest.permission.CREATE_VIRTUAL_DEVICE) public void setShowPointerIcon(boolean);

core/java/android/companion/virtual/IVirtualDevice.aidl

@@ -42,6 +42,11 @@ interface IVirtualDevice {
      */
     int getAssociationId();
 
+    /**
+     * Returns the unique device ID for this virtual device.
+     */
+    int getDeviceId();
+
     /**
      * Closes the virtual device and frees all associated resources.
      */

core/java/android/companion/virtual/VirtualDeviceManager.java

@@ -78,6 +78,16 @@ public final class VirtualDeviceManager {
                     | DisplayManager.VIRTUAL_DISPLAY_FLAG_SUPPORTS_TOUCH
                     | DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_DISPLAY_GROUP;
 
+    /**
+     * The default device ID, which is the ID of the primary (non-virtual) device.
+     */
+    public static final int DEFAULT_DEVICE_ID = 0;
+
+    /**
+     * Invalid device ID.
+     */
+    public static final int INVALID_DEVICE_ID = -1;
+
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(
@@ -203,6 +213,17 @@ public final class VirtualDeviceManager {
                     mActivityListenerBinder);
         }
 
+        /**
+         * Returns the unique ID of this virtual device.
+         */
+        public int getDeviceId() {
+            try {
+                return mVirtualDevice.getDeviceId();
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+        }
+
         /**
          * Launches a given pending intent on the give display ID.
          *

services/companion/java/com/android/server/companion/virtual/VirtualDeviceImpl.java

@@ -95,6 +95,7 @@ final class VirtualDeviceImpl extends IVirtualDevice.Stub
     private final AssociationInfo mAssociationInfo;
     private final PendingTrampolineCallback mPendingTrampolineCallback;
     private final int mOwnerUid;
+    private final int mDeviceId;
     private final InputController mInputController;
     private VirtualAudioController mVirtualAudioController;
     @VisibleForTesting
@@ -140,19 +141,40 @@ final class VirtualDeviceImpl extends IVirtualDevice.Stub
     private final SparseArray<GenericWindowPolicyController> mWindowPolicyControllers =
             new SparseArray<>();
 
-    VirtualDeviceImpl(Context context, AssociationInfo associationInfo,
-            IBinder token, int ownerUid, OnDeviceCloseListener listener,
+    VirtualDeviceImpl(
+            Context context,
+            AssociationInfo associationInfo,
+            IBinder token,
+            int ownerUid,
+            int deviceId,
+            OnDeviceCloseListener listener,
             PendingTrampolineCallback pendingTrampolineCallback,
             IVirtualDeviceActivityListener activityListener,
             Consumer<ArraySet<Integer>> runningAppsChangedCallback,
             VirtualDeviceParams params) {
-        this(context, associationInfo, token, ownerUid, /* inputController= */ null, listener,
-                pendingTrampolineCallback, activityListener, runningAppsChangedCallback, params);
+        this(
+                context,
+                associationInfo,
+                token,
+                ownerUid,
+                deviceId,
+                /* inputController= */ null,
+                listener,
+                pendingTrampolineCallback,
+                activityListener,
+                runningAppsChangedCallback,
+                params);
     }
 
     @VisibleForTesting
-    VirtualDeviceImpl(Context context, AssociationInfo associationInfo, IBinder token,
-            int ownerUid, InputController inputController, OnDeviceCloseListener listener,
+    VirtualDeviceImpl(
+            Context context,
+            AssociationInfo associationInfo,
+            IBinder token,
+            int ownerUid,
+            int deviceId,
+            InputController inputController,
+            OnDeviceCloseListener listener,
             PendingTrampolineCallback pendingTrampolineCallback,
             IVirtualDeviceActivityListener activityListener,
             Consumer<ArraySet<Integer>> runningAppsChangedCallback,
@@ -164,6 +186,7 @@ final class VirtualDeviceImpl extends IVirtualDevice.Stub
         mActivityListener = activityListener;
         mRunningAppsChangedCallback = runningAppsChangedCallback;
         mOwnerUid = ownerUid;
+        mDeviceId = deviceId;
         mAppToken = token;
         mParams = params;
         if (inputController == null) {
@@ -199,6 +222,12 @@ final class VirtualDeviceImpl extends IVirtualDevice.Stub
         return mAssociationInfo.getDisplayName();
     }
 
+    /** Returns the unique device ID of this device. */
+    @Override // Binder call
+    public int getDeviceId() {
+        return mDeviceId;
+    }
+
     @Override // Binder call
     public int getAssociationId() {
         return mAssociationInfo.getId();

services/companion/java/com/android/server/companion/virtual/VirtualDeviceManagerService.java

@@ -60,12 +60,12 @@ import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
 
 
 @SuppressLint("LongLogTag")
 public class VirtualDeviceManagerService extends SystemService {
 
-    private static final boolean DEBUG = false;
     private static final String TAG = "VirtualDeviceManagerService";
 
     private final Object mVirtualDeviceManagerLock = new Object();
@@ -73,6 +73,10 @@ public class VirtualDeviceManagerService extends SystemService {
     private final VirtualDeviceManagerInternal mLocalService;
     private final Handler mHandler = new Handler(Looper.getMainLooper());
     private final PendingTrampolineMap mPendingTrampolines = new PendingTrampolineMap(mHandler);
+
+    private static AtomicInteger sNextUniqueIndex = new AtomicInteger(
+            VirtualDeviceManager.DEFAULT_DEVICE_ID + 1);
+
     /**
      * Mapping from user IDs to CameraAccessControllers.
      */
@@ -260,8 +264,10 @@ public class VirtualDeviceManagerService extends SystemService {
                 final int userId = UserHandle.getUserId(callingUid);
                 final CameraAccessController cameraAccessController =
                         mCameraAccessControllers.get(userId);
+                final int uniqueId = sNextUniqueIndex.getAndIncrement();
+
                 VirtualDeviceImpl virtualDevice = new VirtualDeviceImpl(getContext(),
-                        associationInfo, token, callingUid,
+                        associationInfo, token, callingUid, uniqueId,
                         new VirtualDeviceImpl.OnDeviceCloseListener() {
                             @Override
                             public void onClose(int associationId) {

services/tests/servicestests/src/com/android/server/companion/virtual/VirtualDeviceManagerServiceTest.java

@@ -236,10 +236,9 @@ public class VirtualDeviceManagerServiceTest {
                 .setBlockedActivities(getBlockedActivities())
                 .build();
         mDeviceImpl = new VirtualDeviceImpl(mContext,
-                mAssociationInfo, new Binder(), /* uid */ 0, mInputController,
-                (int associationId) -> {
-                }, mPendingTrampolineCallback, mActivityListener, mRunningAppsChangedCallback,
-                params);
+                mAssociationInfo, new Binder(), /* ownerUid */ 0, /* uniqueId */ 1,
+                mInputController, (int associationId) -> {}, mPendingTrampolineCallback,
+                mActivityListener, mRunningAppsChangedCallback, params);
     }
 
     @Test