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-rw-r--r--core/java/android/app/WallpaperManager.java58
-rw-r--r--core/java/android/service/wallpaper/WallpaperService.java39
-rw-r--r--packages/SystemUI/src/com/android/systemui/ImageWallpaper.java15
-rw-r--r--packages/SystemUI/src/com/android/systemui/glwallpaper/ImageWallpaperRenderer.java6
-rw-r--r--services/core/java/com/android/server/wallpaper/WallpaperManagerService.java49
-rw-r--r--services/tests/mockingservicestests/src/com/android/server/wallpaper/WallpaperManagerServiceTests.java57
6 files changed, 196 insertions, 28 deletions
diff --git a/core/java/android/app/WallpaperManager.java b/core/java/android/app/WallpaperManager.java
index 8d332ab1d58b..6cfa39cd2337 100644
--- a/core/java/android/app/WallpaperManager.java
+++ b/core/java/android/app/WallpaperManager.java
@@ -559,6 +559,53 @@ public class WallpaperManager {
return null;
}
+ public Rect peekWallpaperDimensions(Context context, boolean returnDefault, int userId) {
+ if (mService != null) {
+ try {
+ if (!mService.isWallpaperSupported(context.getOpPackageName())) {
+ return new Rect();
+ }
+ } catch (RemoteException e) {
+ throw e.rethrowFromSystemServer();
+ }
+ }
+
+ Rect dimensions = null;
+ synchronized (this) {
+ try {
+ Bundle params = new Bundle();
+ // Let's peek user wallpaper first.
+ ParcelFileDescriptor pfd = mService.getWallpaperWithFeature(
+ context.getOpPackageName(), context.getAttributionTag(), this,
+ FLAG_SYSTEM, params, userId);
+ if (pfd != null) {
+ BitmapFactory.Options options = new BitmapFactory.Options();
+ options.inJustDecodeBounds = true;
+ BitmapFactory.decodeFileDescriptor(pfd.getFileDescriptor(), null, options);
+ dimensions = new Rect(0, 0, options.outWidth, options.outHeight);
+ }
+ } catch (RemoteException ex) {
+ Log.w(TAG, "peek wallpaper dimensions failed", ex);
+ }
+ }
+ // If user wallpaper is unavailable, may be the default one instead.
+ if ((dimensions == null || dimensions.width() == 0 || dimensions.height() == 0)
+ && returnDefault) {
+ InputStream is = openDefaultWallpaper(context, FLAG_SYSTEM);
+ if (is != null) {
+ try {
+ BitmapFactory.Options options = new BitmapFactory.Options();
+ options.inJustDecodeBounds = true;
+ BitmapFactory.decodeStream(is, null, options);
+ dimensions = new Rect(0, 0, options.outWidth, options.outHeight);
+ } finally {
+ IoUtils.closeQuietly(is);
+ }
+ }
+ }
+ return dimensions;
+ }
+
void forgetLoadedWallpaper() {
synchronized (this) {
mCachedWallpaper = null;
@@ -1039,6 +1086,17 @@ public class WallpaperManager {
}
/**
+ * Peek the dimensions of system wallpaper of the user without decoding it.
+ *
+ * @return the dimensions of system wallpaper
+ * @hide
+ */
+ public Rect peekBitmapDimensions() {
+ return sGlobals.peekWallpaperDimensions(
+ mContext, true /* returnDefault */, mContext.getUserId());
+ }
+
+ /**
* Get an open, readable file descriptor to the given wallpaper image file.
* The caller is responsible for closing the file descriptor when done ingesting the file.
*
diff --git a/core/java/android/service/wallpaper/WallpaperService.java b/core/java/android/service/wallpaper/WallpaperService.java
index f4770727e31f..c198a492d4c9 100644
--- a/core/java/android/service/wallpaper/WallpaperService.java
+++ b/core/java/android/service/wallpaper/WallpaperService.java
@@ -96,6 +96,7 @@ import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
+import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Supplier;
@@ -152,6 +153,7 @@ public abstract class WallpaperService extends Service {
private static final int MSG_REQUEST_WALLPAPER_COLORS = 10050;
private static final int MSG_ZOOM = 10100;
private static final int MSG_SCALE_PREVIEW = 10110;
+ private static final int MSG_REPORT_SHOWN = 10150;
private static final List<Float> PROHIBITED_STEPS = Arrays.asList(0f, Float.POSITIVE_INFINITY,
Float.NEGATIVE_INFINITY);
@@ -527,6 +529,35 @@ public abstract class WallpaperService extends Service {
}
/**
+ * This will be called in the end of {@link #updateSurface(boolean, boolean, boolean)}.
+ * If true is returned, the engine will not report shown until rendering finished is
+ * reported. Otherwise, the engine will report shown immediately right after redraw phase
+ * in {@link #updateSurface(boolean, boolean, boolean)}.
+ *
+ * @hide
+ */
+ public boolean shouldWaitForEngineShown() {
+ return false;
+ }
+
+ /**
+ * Reports the rendering is finished, stops waiting, then invokes
+ * {@link IWallpaperEngineWrapper#reportShown()}.
+ *
+ * @hide
+ */
+ public void reportEngineShown(boolean waitForEngineShown) {
+ if (mIWallpaperEngine.mShownReported) return;
+ Message message = mCaller.obtainMessage(MSG_REPORT_SHOWN);
+ if (!waitForEngineShown) {
+ mCaller.removeMessages(MSG_REPORT_SHOWN);
+ mCaller.sendMessage(message);
+ } else {
+ mCaller.sendMessageDelayed(message, TimeUnit.SECONDS.toMillis(1));
+ }
+ }
+
+ /**
* Control whether this wallpaper will receive raw touch events
* from the window manager as the user interacts with the window
* that is currently displaying the wallpaper. By default they
@@ -930,7 +961,7 @@ public abstract class WallpaperService extends Service {
void updateSurface(boolean forceRelayout, boolean forceReport, boolean redrawNeeded) {
if (mDestroyed) {
- Log.w(TAG, "Ignoring updateSurface: destroyed");
+ Log.w(TAG, "Ignoring updateSurface due to destroyed");
}
boolean fixedSize = false;
@@ -1197,7 +1228,6 @@ public abstract class WallpaperService extends Service {
+ this);
onVisibilityChanged(false);
}
-
} finally {
mIsCreating = false;
mSurfaceCreated = true;
@@ -1207,7 +1237,7 @@ public abstract class WallpaperService extends Service {
processLocalColors(mPendingXOffset, mPendingXOffsetStep);
}
reposition();
- mIWallpaperEngine.reportShown();
+ reportEngineShown(shouldWaitForEngineShown());
}
} catch (RemoteException ex) {
}
@@ -2201,6 +2231,9 @@ public abstract class WallpaperService extends Service {
// Connection went away, nothing to do in here.
}
} break;
+ case MSG_REPORT_SHOWN: {
+ reportShown();
+ } break;
default :
Log.w(TAG, "Unknown message type " + message.what);
}
diff --git a/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java b/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
index c8f8404ff0d6..8379ccf3154a 100644
--- a/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
+++ b/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
@@ -120,15 +120,16 @@ public class ImageWallpaper extends WallpaperService {
@Override
public void onCreate(SurfaceHolder surfaceHolder) {
+ Trace.beginSection("ImageWallpaper.Engine#onCreate");
mEglHelper = getEglHelperInstance();
// Deferred init renderer because we need to get wallpaper by display context.
mRenderer = getRendererInstance();
setFixedSizeAllowed(true);
updateSurfaceSize();
-
mRenderer.setOnBitmapChanged(this::updateMiniBitmap);
getDisplayContext().getSystemService(DisplayManager.class)
.registerDisplayListener(this, mWorker.getThreadHandler());
+ Trace.endSection();
}
@Override
@@ -198,15 +199,22 @@ public class ImageWallpaper extends WallpaperService {
}
@Override
+ public boolean shouldWaitForEngineShown() {
+ return true;
+ }
+
+ @Override
public void onDestroy() {
getDisplayContext().getSystemService(DisplayManager.class)
.unregisterDisplayListener(this);
mMiniBitmap = null;
mWorker.getThreadHandler().post(() -> {
+ Trace.beginSection("ImageWallpaper.Engine#onDestroy");
mRenderer.finish();
mRenderer = null;
mEglHelper.finish();
mEglHelper = null;
+ Trace.endSection();
});
}
@@ -340,8 +348,10 @@ public class ImageWallpaper extends WallpaperService {
public void onSurfaceCreated(SurfaceHolder holder) {
if (mWorker == null) return;
mWorker.getThreadHandler().post(() -> {
+ Trace.beginSection("ImageWallpaper#onSurfaceCreated");
mEglHelper.init(holder, needSupportWideColorGamut());
mRenderer.onSurfaceCreated();
+ Trace.endSection();
});
}
@@ -358,9 +368,11 @@ public class ImageWallpaper extends WallpaperService {
}
private void drawFrame() {
+ Trace.beginSection("ImageWallpaper#drawFrame");
preRender();
requestRender();
postRender();
+ Trace.endSection();
}
public void preRender() {
@@ -427,6 +439,7 @@ public class ImageWallpaper extends WallpaperService {
// This method should only be invoked from worker thread.
Trace.beginSection("ImageWallpaper#postRender");
scheduleFinishRendering();
+ reportEngineShown(false /* waitForEngineShown */);
Trace.endSection();
}
diff --git a/packages/SystemUI/src/com/android/systemui/glwallpaper/ImageWallpaperRenderer.java b/packages/SystemUI/src/com/android/systemui/glwallpaper/ImageWallpaperRenderer.java
index d30783c29f92..a51ec54ebcce 100644
--- a/packages/SystemUI/src/com/android/systemui/glwallpaper/ImageWallpaperRenderer.java
+++ b/packages/SystemUI/src/com/android/systemui/glwallpaper/ImageWallpaperRenderer.java
@@ -102,7 +102,6 @@ public class ImageWallpaperRenderer implements GLWallpaperRenderer {
@Override
public Size reportSurfaceSize() {
- mTexture.use(null /* consumer */);
mSurfaceSize.set(mTexture.getTextureDimensions());
return new Size(mSurfaceSize.width(), mSurfaceSize.height());
}
@@ -124,6 +123,7 @@ public class ImageWallpaperRenderer implements GLWallpaperRenderer {
private final WallpaperManager mWallpaperManager;
private Bitmap mBitmap;
private boolean mWcgContent;
+ private boolean mTextureUsed;
private WallpaperTexture(WallpaperManager wallpaperManager) {
mWallpaperManager = wallpaperManager;
@@ -141,6 +141,7 @@ public class ImageWallpaperRenderer implements GLWallpaperRenderer {
mWallpaperManager.forgetLoadedWallpaper();
if (mBitmap != null) {
mDimensions.set(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
+ mTextureUsed = true;
} else {
Log.w(TAG, "Can't get bitmap");
}
@@ -171,6 +172,9 @@ public class ImageWallpaperRenderer implements GLWallpaperRenderer {
}
private Rect getTextureDimensions() {
+ if (!mTextureUsed) {
+ mDimensions.set(mWallpaperManager.peekBitmapDimensions());
+ }
return mDimensions;
}
diff --git a/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java b/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
index 80bc16a9b052..a51ed09790a4 100644
--- a/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
+++ b/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
@@ -208,7 +208,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
* wallpaper set and is created for the first time. The CLOSE_WRITE is triggered
* every time the wallpaper is changed.
*/
- private class WallpaperObserver extends FileObserver {
+ class WallpaperObserver extends FileObserver {
final int mUserId;
final WallpaperData mWallpaper;
@@ -226,7 +226,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
mWallpaperLockFile = new File(mWallpaperDir, WALLPAPER_LOCK_ORIG);
}
- private WallpaperData dataForEvent(boolean sysChanged, boolean lockChanged) {
+ WallpaperData dataForEvent(boolean sysChanged, boolean lockChanged) {
WallpaperData wallpaper = null;
synchronized (mLock) {
if (lockChanged) {
@@ -309,9 +309,18 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
}
wallpaper.imageWallpaperPending = false;
if (sysWallpaperChanged) {
+ IRemoteCallback.Stub callback = new IRemoteCallback.Stub() {
+ @Override
+ public void sendResult(Bundle data) throws RemoteException {
+ if (DEBUG) {
+ Slog.d(TAG, "publish system wallpaper changed!");
+ }
+ notifyWallpaperChanged(wallpaper);
+ }
+ };
// If this was the system wallpaper, rebind...
bindWallpaperComponentLocked(mImageWallpaper, true,
- false, wallpaper, null);
+ false, wallpaper, callback);
notifyColorsWhich |= FLAG_SYSTEM;
}
if (lockWallpaperChanged
@@ -331,15 +340,9 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
}
saveSettingsLocked(wallpaper.userId);
-
- // Publish completion *after* we've persisted the changes
- if (wallpaper.setComplete != null) {
- try {
- wallpaper.setComplete.onWallpaperChanged();
- } catch (RemoteException e) {
- // if this fails we don't really care; the setting app may just
- // have crashed and that sort of thing is a fact of life.
- }
+ // Notify the client immediately if only lockscreen wallpaper changed.
+ if (lockWallpaperChanged && !sysWallpaperChanged) {
+ notifyWallpaperChanged(wallpaper);
}
}
}
@@ -353,6 +356,18 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
}
}
+ private void notifyWallpaperChanged(WallpaperData wallpaper) {
+ // Publish completion *after* we've persisted the changes
+ if (wallpaper.setComplete != null) {
+ try {
+ wallpaper.setComplete.onWallpaperChanged();
+ } catch (RemoteException e) {
+ // if this fails we don't really care; the setting app may just
+ // have crashed and that sort of thing is a fact of life.
+ }
+ }
+ }
+
private void notifyLockWallpaperChanged() {
final IWallpaperManagerCallback cb = mKeyguardListener;
if (cb != null) {
@@ -364,7 +379,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
}
}
- private void notifyWallpaperColorsChanged(@NonNull WallpaperData wallpaper, int which) {
+ void notifyWallpaperColorsChanged(@NonNull WallpaperData wallpaper, int which) {
if (wallpaper.connection != null) {
wallpaper.connection.forEachDisplayConnector(connector -> {
notifyWallpaperColorsChangedOnDisplay(wallpaper, which, connector.mDisplayId);
@@ -568,7 +583,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
* Once a new wallpaper has been written via setWallpaper(...), it needs to be cropped
* for display.
*/
- private void generateCrop(WallpaperData wallpaper) {
+ void generateCrop(WallpaperData wallpaper) {
boolean success = false;
// Only generate crop for default display.
@@ -2834,7 +2849,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
return false;
}
- private boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force,
+ boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force,
boolean fromUser, WallpaperData wallpaper, IRemoteCallback reply) {
if (DEBUG_LIVE) {
Slog.v(TAG, "bindWallpaperComponentLocked: componentName=" + componentName);
@@ -3121,7 +3136,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
return new JournaledFile(new File(base), new File(base + ".tmp"));
}
- private void saveSettingsLocked(int userId) {
+ void saveSettingsLocked(int userId) {
JournaledFile journal = makeJournaledFile(userId);
FileOutputStream fstream = null;
try {
@@ -3270,7 +3285,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
* Important: this method loads settings to initialize the given user's wallpaper data if
* there is no current in-memory state.
*/
- private WallpaperData getWallpaperSafeLocked(int userId, int which) {
+ WallpaperData getWallpaperSafeLocked(int userId, int which) {
// We're setting either just system (work with the system wallpaper),
// both (also work with the system wallpaper), or just the lock
// wallpaper (update against the existing lock wallpaper if any).
diff --git a/services/tests/mockingservicestests/src/com/android/server/wallpaper/WallpaperManagerServiceTests.java b/services/tests/mockingservicestests/src/com/android/server/wallpaper/WallpaperManagerServiceTests.java
index 53483f6d70bc..a49afc75c739 100644
--- a/services/tests/mockingservicestests/src/com/android/server/wallpaper/WallpaperManagerServiceTests.java
+++ b/services/tests/mockingservicestests/src/com/android/server/wallpaper/WallpaperManagerServiceTests.java
@@ -18,13 +18,18 @@ package com.android.server.wallpaper;
import static android.app.WallpaperManager.COMMAND_REAPPLY;
import static android.app.WallpaperManager.FLAG_SYSTEM;
+import static android.os.FileObserver.CLOSE_WRITE;
+import static android.os.UserHandle.USER_SYSTEM;
import static android.view.Display.DEFAULT_DISPLAY;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.doAnswer;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.doNothing;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.mock;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.spyOn;
+import static com.android.server.wallpaper.WallpaperManagerService.WALLPAPER;
+import static com.android.server.wallpaper.WallpaperManagerService.WALLPAPER_CROP;
import static org.hamcrest.core.IsNot.not;
import static org.junit.Assert.assertEquals;
@@ -34,6 +39,7 @@ import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assume.assumeThat;
import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.reset;
@@ -41,6 +47,7 @@ import static org.mockito.Mockito.verify;
import android.app.AppGlobals;
import android.app.AppOpsManager;
+import android.app.WallpaperColors;
import android.app.WallpaperManager;
import android.content.ComponentName;
import android.content.Context;
@@ -49,8 +56,10 @@ import android.content.pm.IPackageManager;
import android.content.pm.PackageManager;
import android.content.pm.ParceledListSlice;
import android.content.pm.ServiceInfo;
+import android.graphics.Color;
import android.hardware.display.DisplayManager;
-import android.os.UserHandle;
+import android.os.RemoteException;
+import android.os.SystemClock;
import android.platform.test.annotations.Presubmit;
import android.service.wallpaper.IWallpaperConnection;
import android.service.wallpaper.IWallpaperEngine;
@@ -143,7 +152,6 @@ public class WallpaperManagerServiceTests {
sContext.getTestablePermissions().setPermission(
android.Manifest.permission.SET_WALLPAPER,
PackageManager.PERMISSION_GRANTED);
- doNothing().when(sContext).sendBroadcastAsUser(any(), any());
//Wallpaper components
sWallpaperService = mock(IWallpaperConnection.Stub.class);
@@ -180,6 +188,7 @@ public class WallpaperManagerServiceTests {
MockitoAnnotations.initMocks(this);
sContext.addMockSystemService(DisplayManager.class, mDisplayManager);
+ doNothing().when(sContext).sendBroadcastAsUser(any(), any());
final Display mockDisplay = mock(Display.class);
doReturn(DISPLAY_SIZE_DIMENSION).when(mockDisplay).getMaximumSizeDimension();
@@ -242,13 +251,13 @@ public class WallpaperManagerServiceTests {
*/
@Test
public void testDataCorrectAfterBoot() {
- mService.switchUser(UserHandle.USER_SYSTEM, null);
+ mService.switchUser(USER_SYSTEM, null);
final WallpaperData fallbackData = mService.mFallbackWallpaper;
assertEquals("Fallback wallpaper component should be ImageWallpaper.",
sImageWallpaperComponentName, fallbackData.wallpaperComponent);
- verifyLastWallpaperData(UserHandle.USER_SYSTEM, sDefaultWallpaperComponent);
+ verifyLastWallpaperData(USER_SYSTEM, sDefaultWallpaperComponent);
verifyDisplayData();
}
@@ -261,7 +270,7 @@ public class WallpaperManagerServiceTests {
assumeThat(sDefaultWallpaperComponent,
not(CoreMatchers.equalTo(sImageWallpaperComponentName)));
- final int testUserId = UserHandle.USER_SYSTEM;
+ final int testUserId = USER_SYSTEM;
mService.switchUser(testUserId, null);
verifyLastWallpaperData(testUserId, sDefaultWallpaperComponent);
verifyCurrentSystemData(testUserId);
@@ -281,7 +290,7 @@ public class WallpaperManagerServiceTests {
*/
@Test
public void testSetCurrentComponent() throws Exception {
- final int testUserId = UserHandle.USER_SYSTEM;
+ final int testUserId = USER_SYSTEM;
mService.switchUser(testUserId, null);
verifyLastWallpaperData(testUserId, sDefaultWallpaperComponent);
verifyCurrentSystemData(testUserId);
@@ -387,6 +396,42 @@ public class WallpaperManagerServiceTests {
assertEquals(systemWallpaperData.primaryColors, shouldMatchSystem.primaryColors);
}
+ @Test
+ public void testWallpaperManagerCallbackInRightOrder() throws RemoteException {
+ WallpaperData wallpaper = new WallpaperData(
+ USER_SYSTEM, mService.getWallpaperDir(USER_SYSTEM), WALLPAPER, WALLPAPER_CROP);
+ wallpaper.primaryColors = new WallpaperColors(Color.valueOf(Color.RED),
+ Color.valueOf(Color.BLUE), null);
+
+ spyOn(wallpaper);
+ doReturn(wallpaper).when(mService).getWallpaperSafeLocked(wallpaper.userId, FLAG_SYSTEM);
+ doNothing().when(mService).switchWallpaper(any(), any());
+ doReturn(true).when(mService)
+ .bindWallpaperComponentLocked(any(), anyBoolean(), anyBoolean(), any(), any());
+ doNothing().when(mService).saveSettingsLocked(wallpaper.userId);
+ doNothing().when(mService).generateCrop(wallpaper);
+
+ // timestamps of {ACTION_WALLPAPER_CHANGED, onWallpaperColorsChanged}
+ final long[] timestamps = new long[2];
+ doAnswer(invocation -> timestamps[0] = SystemClock.elapsedRealtime())
+ .when(sContext).sendBroadcastAsUser(any(), any());
+ doAnswer(invocation -> timestamps[1] = SystemClock.elapsedRealtime())
+ .when(mService).notifyWallpaperColorsChanged(wallpaper, FLAG_SYSTEM);
+
+ assertNull(wallpaper.wallpaperObserver);
+ mService.switchUser(wallpaper.userId, null);
+ assertNotNull(wallpaper.wallpaperObserver);
+ // We will call onEvent directly, so stop watching the file.
+ wallpaper.wallpaperObserver.stopWatching();
+
+ spyOn(wallpaper.wallpaperObserver);
+ doReturn(wallpaper).when(wallpaper.wallpaperObserver).dataForEvent(true, false);
+ wallpaper.wallpaperObserver.onEvent(CLOSE_WRITE, WALLPAPER);
+
+ // ACTION_WALLPAPER_CHANGED should be invoked before onWallpaperColorsChanged.
+ assertTrue(timestamps[1] > timestamps[0]);
+ }
+
// Verify that after continue switch user from userId 0 to lastUserId, the wallpaper data for
// non-current user must not bind to wallpaper service.
private void verifyNoConnectionBeforeLastUser(int lastUserId) {