diff --git a/services/core/java/com/android/server/TextServicesManagerService.java b/services/core/java/com/android/server/TextServicesManagerService.java
index 0f9a25b8ca680..e3af7e3777335 100644
--- a/services/core/java/com/android/server/TextServicesManagerService.java
+++ b/services/core/java/com/android/server/TextServicesManagerService.java
@@ -27,9 +27,9 @@ import com.android.internal.textservice.ITextServicesSessionListener;
 
 import org.xmlpull.v1.XmlPullParserException;
 
+import android.annotation.UserIdInt;
 import android.app.ActivityManagerNative;
 import android.app.AppGlobals;
-import android.app.SynchronousUserSwitchObserver;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.ContentResolver;
@@ -81,9 +81,47 @@ public class TextServicesManagerService extends ITextServicesManager.Stub {
     private final HashMap<String, SpellCheckerBindGroup> mSpellCheckerBindGroups = new HashMap<>();
     private final TextServicesSettings mSettings;
 
-    public void systemRunning() {
-        if (!mSystemReady) {
-            mSystemReady = true;
+    public static final class Lifecycle extends SystemService {
+        private TextServicesManagerService mService;
+
+        public Lifecycle(Context context) {
+            super(context);
+            mService = new TextServicesManagerService(context);
+        }
+
+        @Override
+        public void onStart() {
+            publishBinderService(Context.TEXT_SERVICES_MANAGER_SERVICE, mService);
+        }
+
+        @Override
+        public void onSwitchUser(@UserIdInt int userHandle) {
+            // Called on the system server's main looper thread.
+            // TODO: Dispatch this to a worker thread as needed.
+            mService.onSwitchUser(userHandle);
+        }
+
+        @Override
+        public void onBootPhase(int phase) {
+            // Called on the system server's main looper thread.
+            // TODO: Dispatch this to a worker thread as needed.
+            if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) {
+                mService.systemRunning();
+            }
+        }
+    }
+
+    void systemRunning() {
+        synchronized (mSpellCheckerMap) {
+            if (!mSystemReady) {
+                mSystemReady = true;
+            }
+        }
+    }
+
+    void onSwitchUser(@UserIdInt int userId) {
+        synchronized (mSpellCheckerMap) {
+            switchUserLocked(userId);
         }
     }
 
@@ -98,24 +136,6 @@ public class TextServicesManagerService extends ITextServicesManager.Stub {
 
         int userId = UserHandle.USER_SYSTEM;
         try {
-            ActivityManagerNative.getDefault().registerUserSwitchObserver(
-                    new SynchronousUserSwitchObserver() {
-                        @Override
-                        public void onUserSwitching(int newUserId) throws RemoteException {
-                            synchronized(mSpellCheckerMap) {
-                                switchUserLocked(newUserId);
-                            }
-                        }
-
-                        @Override
-                        public void onUserSwitchComplete(int newUserId) throws RemoteException {
-                        }
-
-                        @Override
-                        public void onForegroundProfileSwitch(int newProfileId) {
-                            // Ignore.
-                        }
-                    });
             userId = ActivityManagerNative.getDefault().getCurrentUser().id;
         } catch (RemoteException e) {
             Slog.w(TAG, "Couldn't get current user ID; guessing it's 0", e);
@@ -128,7 +148,7 @@ public class TextServicesManagerService extends ITextServicesManager.Stub {
         switchUserLocked(userId);
     }
 
-    private void switchUserLocked(int userId) {
+    private void switchUserLocked(@UserIdInt int userId) {
         mSettings.setCurrentUserId(userId);
         updateCurrentProfileIds();
         unbindServiceLocked();
@@ -1011,17 +1031,18 @@ public class TextServicesManagerService extends ITextServicesManager.Stub {
 
     private static class TextServicesSettings {
         private final ContentResolver mResolver;
+        @UserIdInt
         private int mCurrentUserId;
         @GuardedBy("mLock")
         private int[] mCurrentProfileIds = new int[0];
         private Object mLock = new Object();
 
-        public TextServicesSettings(ContentResolver resolver, int userId) {
+        public TextServicesSettings(ContentResolver resolver, @UserIdInt int userId) {
             mResolver = resolver;
             mCurrentUserId = userId;
         }
 
-        public void setCurrentUserId(int userId) {
+        public void setCurrentUserId(@UserIdInt int userId) {
             if (DBG) {
                 Slog.d(TAG, "--- Swtich the current user from " + mCurrentUserId + " to "
                         + userId + ", new ime = " + getSelectedSpellChecker());
@@ -1036,7 +1057,7 @@ public class TextServicesManagerService extends ITextServicesManager.Stub {
             }
         }
 
-        public boolean isCurrentProfile(int userId) {
+        public boolean isCurrentProfile(@UserIdInt int userId) {
             synchronized (mLock) {
                 if (userId == mCurrentUserId) return true;
                 for (int i = 0; i < mCurrentProfileIds.length; i++) {
@@ -1046,6 +1067,7 @@ public class TextServicesManagerService extends ITextServicesManager.Stub {
             }
         }
 
+        @UserIdInt
         public int getCurrentUserId() {
             return mCurrentUserId;
         }
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index b8c31e3f063ef..a2d5259b27586 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -635,7 +635,6 @@ public final class SystemServer {
         WallpaperManagerService wallpaper = null;
         LocationManagerService location = null;
         CountryDetectorService countryDetector = null;
-        TextServicesManagerService tsms = null;
         ILockSettings lockSettings = null;
         AssetAtlasService atlas = null;
         MediaRouterService mediaRouter = null;
@@ -762,14 +761,7 @@ public final class SystemServer {
             }
 
             if (!disableNonCoreServices) {
-                traceBeginAndSlog("StartTextServicesManagerService");
-                try {
-                    tsms = new TextServicesManagerService(context);
-                    ServiceManager.addService(Context.TEXT_SERVICES_MANAGER_SERVICE, tsms);
-                } catch (Throwable e) {
-                    reportWtf("starting Text Service Manager Service", e);
-                }
-                Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
+                mSystemServiceManager.startService(TextServicesManagerService.Lifecycle.class);
             }
 
             if (!disableNetwork) {
@@ -1256,7 +1248,6 @@ public final class SystemServer {
         final CountryDetectorService countryDetectorF = countryDetector;
         final NetworkTimeUpdateService networkTimeUpdaterF = networkTimeUpdater;
         final CommonTimeManagementService commonTimeMgmtServiceF = commonTimeMgmtService;
-        final TextServicesManagerService textServiceManagerServiceF = tsms;
         final StatusBarManagerService statusBarF = statusBar;
         final AssetAtlasService atlasF = atlas;
         final InputManagerService inputManagerF = inputManager;
@@ -1371,12 +1362,6 @@ public final class SystemServer {
                 } catch (Throwable e) {
                     reportWtf("Notifying CommonTimeManagementService running", e);
                 }
-                try {
-                    if (textServiceManagerServiceF != null)
-                        textServiceManagerServiceF.systemRunning();
-                } catch (Throwable e) {
-                    reportWtf("Notifying TextServicesManagerService running", e);
-                }
                 try {
                     if (atlasF != null) atlasF.systemRunning();
                 } catch (Throwable e) {