Synchronize window config updates (3/n) (9ec6eedc) · Commits · e / os / android_frameworks_base

core/java/android/app/servertransaction/ClientTransactionListenerController.java

+14 −71

Original line number	Original line	Diff line number	Diff line
	@@ -20,46 +20,31 @@ import static com.android.window.flags.Flags.syncWindowConfigUpdateFlag;

	import static java.util.Objects.requireNonNull;		import static java.util.Objects.requireNonNull;

	import android.annotation.CallbackExecutor;
	import android.annotation.NonNull;		import android.annotation.NonNull;
			import android.app.ActivityThread;
			import android.hardware.display.DisplayManagerGlobal;
	import android.os.Process;		import android.os.Process;
	import android.util.ArrayMap;

	import com.android.internal.annotations.GuardedBy;
	import com.android.internal.annotations.VisibleForTesting;		import com.android.internal.annotations.VisibleForTesting;

	import java.util.ArrayList;
	import java.util.concurrent.Executor;
	import java.util.function.IntConsumer;

	/**		/**
	* Singleton controller to manage listeners to individual {@link ClientTransaction}.		* Singleton controller to manage listeners to individual {@link ClientTransaction}.
	*		*
	* TODO(b/260873529) make as TestApi to allow CTS.
	* @hide		* @hide
	*/		*/
	public class ClientTransactionListenerController {		public class ClientTransactionListenerController {

	private static ClientTransactionListenerController sController;		private static ClientTransactionListenerController sController;

	private final Object mLock = new Object();		private final DisplayManagerGlobal mDisplayManager;

	/**
	* Mapping from client registered listener for display change to the corresponding
	* {@link Executor} to invoke the listener on.
	* @see #registerDisplayChangeListener(IntConsumer, Executor)
	*/
	@GuardedBy("mLock")
	private final ArrayMap<IntConsumer, Executor> mDisplayChangeListeners = new ArrayMap<>();

	private final ArrayList<IntConsumer> mTmpDisplayChangeListeners = new ArrayList<>();

	/** Gets the singleton controller. */		/** Gets the singleton controller. */
	@NonNull		@NonNull
	public static ClientTransactionListenerController getInstance() {		public static ClientTransactionListenerController getInstance() {
	synchronized (ClientTransactionListenerController.class) {		synchronized (ClientTransactionListenerController.class) {
	if (sController == null) {		if (sController == null) {
	sController = new ClientTransactionListenerController();		sController = new ClientTransactionListenerController(
			DisplayManagerGlobal.getInstance());
	}		}
	return sController;		return sController;
	}		}
	@@ -68,45 +53,13 @@ public class ClientTransactionListenerController {
	/** Creates a new instance for test only. */		/** Creates a new instance for test only. */
	@VisibleForTesting		@VisibleForTesting
	@NonNull		@NonNull
	public static ClientTransactionListenerController createInstanceForTesting() {		public static ClientTransactionListenerController createInstanceForTesting(
	return new ClientTransactionListenerController();		@NonNull DisplayManagerGlobal displayManager) {
	}		return new ClientTransactionListenerController(displayManager);

	private ClientTransactionListenerController() {}

	/**
	* Registers a new listener for display change. It will be invoked when receives a
	* {@link ClientTransaction} that is updating display-related window configuration, such as
	* bounds and rotation.
	*
	* WHen triggered, the listener will be invoked with the logical display id that was changed.
	*
	* @param listener the listener to invoke when receives a transaction with Display change.
	* @param executor the executor on which callback method will be invoked.
	*/
	public void registerDisplayChangeListener(@NonNull IntConsumer listener,
	@NonNull @CallbackExecutor Executor executor) {
	if (!isSyncWindowConfigUpdateFlagEnabled()) {
	return;
	}
	requireNonNull(listener);
	requireNonNull(executor);
	synchronized (mLock) {
	mDisplayChangeListeners.put(listener, executor);
	}
	}		}

	/**		private ClientTransactionListenerController(@NonNull DisplayManagerGlobal displayManager) {
	* Unregisters the listener for display change that was previously registered through		mDisplayManager = requireNonNull(displayManager);
	* {@link #registerDisplayChangeListener}.
	*/
	public void unregisterDisplayChangeListener(@NonNull IntConsumer listener) {
	if (!isSyncWindowConfigUpdateFlagEnabled()) {
	return;
	}
	synchronized (mLock) {
	mDisplayChangeListeners.remove(listener);
	}
	}		}

	/**		/**
	@@ -117,24 +70,14 @@ public class ClientTransactionListenerController {
	if (!isSyncWindowConfigUpdateFlagEnabled()) {		if (!isSyncWindowConfigUpdateFlagEnabled()) {
	return;		return;
	}		}
	synchronized (mLock) {		if (ActivityThread.isSystem()) {
	// Make a copy of the list to avoid listener removal during callback.		// Not enable for system server.
	mTmpDisplayChangeListeners.addAll(mDisplayChangeListeners.keySet());		return;
	final int num = mTmpDisplayChangeListeners.size();
	try {
	for (int i = 0; i < num; i++) {
	final IntConsumer listener = mTmpDisplayChangeListeners.get(i);
	final Executor executor = mDisplayChangeListeners.get(listener);
	executor.execute(() -> listener.accept(displayId));
	}
	} finally {
	mTmpDisplayChangeListeners.clear();
	}
	}		}
			mDisplayManager.handleDisplayChangeFromWindowManager(displayId);
	}		}

	/** Whether {@link #syncWindowConfigUpdateFlag} feature flag is enabled. */		/** Whether {@link #syncWindowConfigUpdateFlag} feature flag is enabled. */
	@VisibleForTesting
	public boolean isSyncWindowConfigUpdateFlagEnabled() {		public boolean isSyncWindowConfigUpdateFlagEnabled() {
	// Can't read flag from isolated process.		// Can't read flag from isolated process.
	return !Process.isIsolated() && syncWindowConfigUpdateFlag();		return !Process.isIsolated() && syncWindowConfigUpdateFlag();

core/java/android/hardware/display/DisplayManagerGlobal.java

+39 −29

Original line number	Original line	Diff line number	Diff line
	@@ -42,7 +42,6 @@ import android.os.Handler;
	import android.os.HandlerExecutor;		import android.os.HandlerExecutor;
	import android.os.IBinder;		import android.os.IBinder;
	import android.os.Looper;		import android.os.Looper;
	import android.os.Message;
	import android.os.RemoteException;		import android.os.RemoteException;
	import android.os.ServiceManager;		import android.os.ServiceManager;
	import android.os.Trace;		import android.os.Trace;
	@@ -412,6 +411,18 @@ public final class DisplayManagerGlobal {
	}		}
	}		}

			/**
			* Called when there is a display-related window configuration change. Reroutes the event from
			* WindowManager to make sure the {@link Display} fields are up-to-date in the last callback.
			* @param displayId the logical display that was changed.
			*/
			public void handleDisplayChangeFromWindowManager(int displayId) {
			// There can be racing condition between DMS and WMS callbacks, so force triggering the
			// listener to make sure the client can get the onDisplayChanged callback even if
			// DisplayInfo is not changed (Display read from both DisplayInfo and WindowConfiguration).
			handleDisplayEvent(displayId, EVENT_DISPLAY_CHANGED, true /* forceUpdate */);
			}

	private static Looper getLooperForHandler(@Nullable Handler handler) {		private static Looper getLooperForHandler(@Nullable Handler handler) {
	Looper looper = handler != null ? handler.getLooper() : Looper.myLooper();		Looper looper = handler != null ? handler.getLooper() : Looper.myLooper();
	if (looper == null) {		if (looper == null) {
	@@ -470,7 +481,7 @@ public final class DisplayManagerGlobal {
	}		}
	}		}

	private void handleDisplayEvent(int displayId, @DisplayEvent int event) {		private void handleDisplayEvent(int displayId, @DisplayEvent int event, boolean forceUpdate) {
	final DisplayInfo info;		final DisplayInfo info;
	synchronized (mLock) {		synchronized (mLock) {
	if (USE_CACHE) {		if (USE_CACHE) {
	@@ -501,7 +512,7 @@ public final class DisplayManagerGlobal {
	// Accepting an Executor means the listener may be synchronously invoked, so we must		// Accepting an Executor means the listener may be synchronously invoked, so we must
	// not be holding mLock when we do so		// not be holding mLock when we do so
	for (DisplayListenerDelegate listener : mDisplayListeners) {		for (DisplayListenerDelegate listener : mDisplayListeners) {
	listener.sendDisplayEvent(displayId, event, info);		listener.sendDisplayEvent(displayId, event, info, forceUpdate);
	}		}
	}		}

	@@ -1176,7 +1187,7 @@ public final class DisplayManagerGlobal {
	Log.d(TAG, "onDisplayEvent: displayId=" + displayId + ", event=" + eventToString(		Log.d(TAG, "onDisplayEvent: displayId=" + displayId + ", event=" + eventToString(
	event));		event));
	}		}
	handleDisplayEvent(displayId, event);		handleDisplayEvent(displayId, event, false /* forceUpdate */);
	}		}
	}		}

	@@ -1197,87 +1208,86 @@ public final class DisplayManagerGlobal {
	mPackageName = packageName;		mPackageName = packageName;
	}		}

	public void sendDisplayEvent(int displayId, @DisplayEvent int event, DisplayInfo info) {		void sendDisplayEvent(int displayId, @DisplayEvent int event, @Nullable DisplayInfo info,
			boolean forceUpdate) {
	if (extraLogging()) {		if (extraLogging()) {
	Slog.i(TAG, "Sending Display Event: " + eventToString(event));		Slog.i(TAG, "Sending Display Event: " + eventToString(event));
	}		}
	long generationId = mGenerationId.get();		long generationId = mGenerationId.get();
	Message msg = Message.obtain(null, event, displayId, 0, info);
	mExecutor.execute(() -> {		mExecutor.execute(() -> {
	// If the generation id's don't match we were canceled but still need to recycle()		// If the generation id's don't match we were canceled
	if (generationId == mGenerationId.get()) {		if (generationId == mGenerationId.get()) {
	handleMessage(msg);		handleDisplayEventInner(displayId, event, info, forceUpdate);
	}		}
	msg.recycle();
	});		});
	}		}

	public void clearEvents() {		void clearEvents() {
	mGenerationId.incrementAndGet();		mGenerationId.incrementAndGet();
	}		}

	public void setEventsMask(@EventsMask long newEventsMask) {		void setEventsMask(@EventsMask long newEventsMask) {
	mEventsMask = newEventsMask;		mEventsMask = newEventsMask;
	}		}

	private void handleMessage(Message msg) {		private void handleDisplayEventInner(int displayId, @DisplayEvent int event,
			@Nullable DisplayInfo info, boolean forceUpdate) {
	if (extraLogging()) {		if (extraLogging()) {
	Slog.i(TAG, "DLD(" + eventToString(msg.what)		Slog.i(TAG, "DLD(" + eventToString(event)
	+ ", display=" + msg.arg1		+ ", display=" + displayId
	+ ", mEventsMask=" + Long.toBinaryString(mEventsMask)		+ ", mEventsMask=" + Long.toBinaryString(mEventsMask)
	+ ", mPackageName=" + mPackageName		+ ", mPackageName=" + mPackageName
	+ ", msg.obj=" + msg.obj		+ ", displayInfo=" + info
	+ ", listener=" + mListener.getClass() + ")");		+ ", listener=" + mListener.getClass() + ")");
	}		}
	if (DEBUG) {		if (DEBUG) {
	Trace.beginSection(		Trace.beginSection(
	TextUtils.trimToSize(		TextUtils.trimToSize(
	"DLD(" + eventToString(msg.what)		"DLD(" + eventToString(event)
	+ ", display=" + msg.arg1		+ ", display=" + displayId
	+ ", listener=" + mListener.getClass() + ")", 127));		+ ", listener=" + mListener.getClass() + ")", 127));
	}		}
	switch (msg.what) {		switch (event) {
	case EVENT_DISPLAY_ADDED:		case EVENT_DISPLAY_ADDED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_ADDED) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_ADDED) != 0) {
	mListener.onDisplayAdded(msg.arg1);		mListener.onDisplayAdded(displayId);
	}		}
	break;		break;
	case EVENT_DISPLAY_CHANGED:		case EVENT_DISPLAY_CHANGED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_CHANGED) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_CHANGED) != 0) {
	DisplayInfo newInfo = (DisplayInfo) msg.obj;		if (info != null && (forceUpdate \|\| !info.equals(mDisplayInfo))) {
	if (newInfo != null && !newInfo.equals(mDisplayInfo)) {
	if (extraLogging()) {		if (extraLogging()) {
	Slog.i(TAG, "Sending onDisplayChanged: Display Changed. Info: "		Slog.i(TAG, "Sending onDisplayChanged: Display Changed. Info: "
	+ newInfo);		+ info);
	}		}
	mDisplayInfo.copyFrom(newInfo);		mDisplayInfo.copyFrom(info);
	mListener.onDisplayChanged(msg.arg1);		mListener.onDisplayChanged(displayId);
	}		}
	}		}
	break;		break;
	case EVENT_DISPLAY_BRIGHTNESS_CHANGED:		case EVENT_DISPLAY_BRIGHTNESS_CHANGED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_BRIGHTNESS) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_BRIGHTNESS) != 0) {
	mListener.onDisplayChanged(msg.arg1);		mListener.onDisplayChanged(displayId);
	}		}
	break;		break;
	case EVENT_DISPLAY_REMOVED:		case EVENT_DISPLAY_REMOVED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_REMOVED) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_REMOVED) != 0) {
	mListener.onDisplayRemoved(msg.arg1);		mListener.onDisplayRemoved(displayId);
	}		}
	break;		break;
	case EVENT_DISPLAY_HDR_SDR_RATIO_CHANGED:		case EVENT_DISPLAY_HDR_SDR_RATIO_CHANGED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_HDR_SDR_RATIO_CHANGED) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_HDR_SDR_RATIO_CHANGED) != 0) {
	mListener.onDisplayChanged(msg.arg1);		mListener.onDisplayChanged(displayId);
	}		}
	break;		break;
	case EVENT_DISPLAY_CONNECTED:		case EVENT_DISPLAY_CONNECTED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_CONNECTION_CHANGED) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_CONNECTION_CHANGED) != 0) {
	mListener.onDisplayConnected(msg.arg1);		mListener.onDisplayConnected(displayId);
	}		}
	break;		break;
	case EVENT_DISPLAY_DISCONNECTED:		case EVENT_DISPLAY_DISCONNECTED:
	if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_CONNECTION_CHANGED) != 0) {		if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_CONNECTION_CHANGED) != 0) {
	mListener.onDisplayDisconnected(msg.arg1);		mListener.onDisplayDisconnected(displayId);
	}		}
	break;		break;
	}		}

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

+26 −17

Original line number	Original line	Diff line number	Diff line
	@@ -16,14 +16,19 @@

	package android.app.servertransaction;		package android.app.servertransaction;

	import static org.mockito.ArgumentMatchers.anyInt;		import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
	import static org.mockito.Mockito.clearInvocations;
	import static org.mockito.Mockito.doReturn;		import static org.mockito.Mockito.doReturn;
	import static org.mockito.Mockito.never;
	import static org.mockito.Mockito.spy;		import static org.mockito.Mockito.spy;
	import static org.mockito.Mockito.verify;		import static org.mockito.Mockito.verify;

			import android.hardware.display.DisplayManager;
			import android.hardware.display.DisplayManagerGlobal;
			import android.hardware.display.IDisplayManager;
			import android.os.Handler;
			import android.os.RemoteException;
	import android.platform.test.annotations.Presubmit;		import android.platform.test.annotations.Presubmit;
			import android.view.DisplayInfo;

	import androidx.test.filters.SmallTest;		import androidx.test.filters.SmallTest;
	import androidx.test.runner.AndroidJUnit4;		import androidx.test.runner.AndroidJUnit4;
	@@ -34,8 +39,6 @@ import org.junit.runner.RunWith;
	import org.mockito.Mock;		import org.mockito.Mock;
	import org.mockito.MockitoAnnotations;		import org.mockito.MockitoAnnotations;

	import java.util.function.IntConsumer;

	/**		/**
	* Tests for {@link ClientTransactionListenerController}.		* Tests for {@link ClientTransactionListenerController}.
	*		*
	@@ -47,30 +50,36 @@ import java.util.function.IntConsumer;
	@Presubmit		@Presubmit
	public class ClientTransactionListenerControllerTest {		public class ClientTransactionListenerControllerTest {
	@Mock		@Mock
	private IntConsumer mDisplayChangeListener;		private IDisplayManager mIDisplayManager;
			@Mock
			private DisplayManager.DisplayListener mListener;

			private DisplayManagerGlobal mDisplayManager;
			private Handler mHandler;
	private ClientTransactionListenerController mController;		private ClientTransactionListenerController mController;

	@Before		@Before
	public void setup() {		public void setup() {
	MockitoAnnotations.initMocks(this);		MockitoAnnotations.initMocks(this);
	mController = spy(ClientTransactionListenerController.createInstanceForTesting());		mDisplayManager = new DisplayManagerGlobal(mIDisplayManager);
			mHandler = getInstrumentation().getContext().getMainThreadHandler();
			mController = spy(ClientTransactionListenerController.createInstanceForTesting(
			mDisplayManager));
	doReturn(true).when(mController).isSyncWindowConfigUpdateFlagEnabled();		doReturn(true).when(mController).isSyncWindowConfigUpdateFlagEnabled();
	}		}

	@Test		@Test
	public void testRegisterDisplayChangeListener() {		public void testOnDisplayChanged() throws RemoteException {
	mController.registerDisplayChangeListener(mDisplayChangeListener, Runnable::run);		// Mock IDisplayManager to return a display info to trigger display change.
			final DisplayInfo newDisplayInfo = new DisplayInfo();
			doReturn(newDisplayInfo).when(mIDisplayManager).getDisplayInfo(123);

	mController.onDisplayChanged(123);		mDisplayManager.registerDisplayListener(mListener, mHandler,
			DisplayManager.EVENT_FLAG_DISPLAY_CHANGED, null /* packageName */);

	verify(mDisplayChangeListener).accept(123);		mController.onDisplayChanged(123);
			mHandler.runWithScissors(() -> { }, 0);
	clearInvocations(mDisplayChangeListener);
	mController.unregisterDisplayChangeListener(mDisplayChangeListener);

	mController.onDisplayChanged(321);

	verify(mDisplayChangeListener, never()).accept(anyInt());		verify(mListener).onDisplayChanged(123);
	}		}
	}		}

core/tests/coretests/src/android/hardware/display/DisplayManagerGlobalTest.java

+59 −1

Original line number	Original line	Diff line number	Diff line
	@@ -16,12 +16,19 @@

	package android.hardware.display;		package android.hardware.display;

			import static org.mockito.ArgumentMatchers.anyInt;
	import static org.mockito.ArgumentMatchers.anyLong;		import static org.mockito.ArgumentMatchers.anyLong;
	import static org.mockito.ArgumentMatchers.eq;		import static org.mockito.ArgumentMatchers.eq;
			import static org.mockito.Mockito.clearInvocations;
			import static org.mockito.Mockito.doReturn;
			import static org.mockito.Mockito.never;
			import static org.mockito.Mockito.verify;

	import android.content.Context;		import android.content.Context;
	import android.os.Handler;		import android.os.Handler;
	import android.os.RemoteException;		import android.os.RemoteException;
			import android.platform.test.annotations.Presubmit;
			import android.view.DisplayInfo;

	import androidx.test.InstrumentationRegistry;		import androidx.test.InstrumentationRegistry;
	import androidx.test.filters.SmallTest;		import androidx.test.filters.SmallTest;
	@@ -37,6 +44,13 @@ import org.mockito.Mock;
	import org.mockito.Mockito;		import org.mockito.Mockito;
	import org.mockito.MockitoAnnotations;		import org.mockito.MockitoAnnotations;

			/**
			* Tests for {@link DisplayManagerGlobal}.
			*
			* Build/Install/Run:
			* atest FrameworksCoreTests:DisplayManagerGlobalTest
			*/
			@Presubmit
	@SmallTest		@SmallTest
	@RunWith(AndroidJUnit4.class)		@RunWith(AndroidJUnit4.class)
	public class DisplayManagerGlobalTest {		public class DisplayManagerGlobalTest {
	@@ -51,6 +65,9 @@ public class DisplayManagerGlobalTest {
	@Mock		@Mock
	private DisplayManager.DisplayListener mListener;		private DisplayManager.DisplayListener mListener;

			@Mock
			private DisplayManager.DisplayListener mListener2;

	@Captor		@Captor
	private ArgumentCaptor<IDisplayManagerCallback> mCallbackCaptor;		private ArgumentCaptor<IDisplayManagerCallback> mCallbackCaptor;

	@@ -82,7 +99,11 @@ public class DisplayManagerGlobalTest {
	Mockito.verifyNoMoreInteractions(mListener);		Mockito.verifyNoMoreInteractions(mListener);

	Mockito.reset(mListener);		Mockito.reset(mListener);
	callback.onDisplayEvent(1, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);		// Mock IDisplayManager to return a different display info to trigger display change.
			final DisplayInfo newDisplayInfo = new DisplayInfo();
			newDisplayInfo.rotation++;
			doReturn(newDisplayInfo).when(mDisplayManager).getDisplayInfo(displayId);
			callback.onDisplayEvent(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
	waitForHandler();		waitForHandler();
	Mockito.verify(mListener).onDisplayChanged(eq(displayId));		Mockito.verify(mListener).onDisplayChanged(eq(displayId));
	Mockito.verifyNoMoreInteractions(mListener);		Mockito.verifyNoMoreInteractions(mListener);
	@@ -161,7 +182,44 @@ public class DisplayManagerGlobalTest {
	mDisplayManagerGlobal.unregisterDisplayListener(mListener);		mDisplayManagerGlobal.unregisterDisplayListener(mListener);
	inOrder.verify(mDisplayManager)		inOrder.verify(mDisplayManager)
	.registerCallbackWithEventMask(mCallbackCaptor.capture(), eq(0L));		.registerCallbackWithEventMask(mCallbackCaptor.capture(), eq(0L));
			}

			@Test
			public void testHandleDisplayChangeFromWindowManager() throws RemoteException {
			// Mock IDisplayManager to return a display info to trigger display change.
			final DisplayInfo newDisplayInfo = new DisplayInfo();
			doReturn(newDisplayInfo).when(mDisplayManager).getDisplayInfo(123);
			doReturn(newDisplayInfo).when(mDisplayManager).getDisplayInfo(321);

			// Nothing happens when there is no listener.
			mDisplayManagerGlobal.handleDisplayChangeFromWindowManager(123);

			// One listener listens on add/remove, and the other one listens on change.
			mDisplayManagerGlobal.registerDisplayListener(mListener, mHandler,
			DisplayManager.EVENT_FLAG_DISPLAY_ADDED
			\| DisplayManager.EVENT_FLAG_DISPLAY_REMOVED, null /* packageName */);
			mDisplayManagerGlobal.registerDisplayListener(mListener2, mHandler,
			DisplayManager.EVENT_FLAG_DISPLAY_CHANGED, null /* packageName */);

			mDisplayManagerGlobal.handleDisplayChangeFromWindowManager(321);
			waitForHandler();

			verify(mListener, never()).onDisplayChanged(anyInt());
			verify(mListener2).onDisplayChanged(321);

			// Trigger the callback again even if the display info is not changed.
			clearInvocations(mListener2);
			mDisplayManagerGlobal.handleDisplayChangeFromWindowManager(321);
			waitForHandler();

			verify(mListener2).onDisplayChanged(321);

			// No callback for non-existing display (no display info returned from IDisplayManager).
			clearInvocations(mListener2);
			mDisplayManagerGlobal.handleDisplayChangeFromWindowManager(456);
			waitForHandler();

			verify(mListener2, never()).onDisplayChanged(anyInt());
	}		}

	private void waitForHandler() {		private void waitForHandler() {