DO NOT MERGE Update current user for passwordEntry and restart input on user switch.

This prevents IME not working due to the passwordEntry input field
drawn for a wrong user or due to having an invalid token.

Test: Manual
Bug: 168825956
Change-Id: I28e38a523e67011df680c9dfb21907047c0e3278

packages/CarSystemUI/src/com/android/systemui/car/keyguard/CarKeyguardViewController.java

@@ -21,10 +21,13 @@ import android.car.user.CarUserManager;
 import android.content.Context;
 import android.os.Bundle;
 import android.os.Handler;
+import android.os.UserHandle;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewRootImpl;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
 
 import androidx.annotation.VisibleForTesting;
 
@@ -61,7 +64,7 @@ import dagger.Lazy;
 public class CarKeyguardViewController extends OverlayViewController implements
         KeyguardViewController {
     private static final String TAG = "CarKeyguardViewController";
-    private static final boolean DEBUG = true;
+    private static final boolean DEBUG = false;
 
     private final Context mContext;
     private final Handler mHandler;
@@ -75,9 +78,10 @@ public class CarKeyguardViewController extends OverlayViewController implements
     private final DismissCallbackRegistry mDismissCallbackRegistry;
     private final ViewMediatorCallback mViewMediatorCallback;
     private final CarNavigationBarController mCarNavigationBarController;
+    private final InputMethodManager mInputMethodManager;
     // Needed to instantiate mBouncer.
-    private final KeyguardBouncer.BouncerExpansionCallback
+    private final KeyguardBouncer.BouncerExpansionCallback mExpansionCallback =
-            mExpansionCallback = new KeyguardBouncer.BouncerExpansionCallback() {
+            new KeyguardBouncer.BouncerExpansionCallback() {
                 @Override
                 public void onFullyShown() {
                 }
@@ -96,7 +100,8 @@ public class CarKeyguardViewController extends OverlayViewController implements
             };
     private final CarUserManager.UserLifecycleListener mUserLifecycleListener = (e) -> {
         if (e.getEventType() == CarUserManager.USER_LIFECYCLE_EVENT_TYPE_SWITCHING) {
-            revealKeyguardIfBouncerPrepared();
+            UserHandle currentUser = e.getUserHandle();
+            revealKeyguardIfBouncerPrepared(currentUser);
         }
     };
 
@@ -136,6 +141,8 @@ public class CarKeyguardViewController extends OverlayViewController implements
         mDismissCallbackRegistry = dismissCallbackRegistry;
         mViewMediatorCallback = viewMediatorCallback;
         mCarNavigationBarController = carNavigationBarController;
+        // TODO(b/169280588): Inject InputMethodManager instead.
+        mInputMethodManager = mContext.getSystemService(InputMethodManager.class);
 
         registerUserSwitchedListener();
     }
@@ -376,7 +383,7 @@ public class CarKeyguardViewController extends OverlayViewController implements
         mBouncer = keyguardBouncer;
     }
 
-    private void revealKeyguardIfBouncerPrepared() {
+    private void revealKeyguardIfBouncerPrepared(UserHandle currentUser) {
         int reattemptDelayMillis = 50;
         Runnable revealKeyguard = () -> {
             if (mBouncer == null) {
@@ -388,17 +395,29 @@ public class CarKeyguardViewController extends OverlayViewController implements
             }
             if (!mBouncer.inTransit() || !mBouncer.isSecure()) {
                 getLayout().setVisibility(View.VISIBLE);
+                updateCurrentUserForPasswordEntry(currentUser);
             } else {
                 if (DEBUG) {
                     Log.d(TAG, "revealKeyguardIfBouncerPrepared: Bouncer is not prepared "
                             + "yet so reattempting after " + reattemptDelayMillis + "ms.");
                 }
-                mHandler.postDelayed(this::revealKeyguardIfBouncerPrepared, reattemptDelayMillis);
+                mHandler.postDelayed(() -> revealKeyguardIfBouncerPrepared(currentUser),
+                        reattemptDelayMillis);
             }
         };
         mHandler.post(revealKeyguard);
     }
 
+    private void updateCurrentUserForPasswordEntry(UserHandle currentUser) {
+        EditText passwordEntry = getLayout().findViewById(R.id.passwordEntry);
+        if (passwordEntry != null) {
+            mHandler.post(() -> {
+                mInputMethodManager.restartInput(passwordEntry);
+                passwordEntry.setTextOperationUser(currentUser);
+            });
+        }
+    }
+
     private void notifyKeyguardUpdateMonitor() {
         mKeyguardUpdateMonitor.onKeyguardVisibilityChanged(mShowing);
         if (mBouncer != null) {