Make unlock dialog exit if the person taps outside of the dialog

Bug: 136049501
Test: Manually on IHU
Change-Id: Iabbca72bf65b5e93aafd53296d77a88ccaaf5dfd

packages/CarSystemUI/res/layout/trust_agent_unlock_dialog.xml

@@ -16,12 +16,13 @@
   -->
 
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/layout"
+    android:id="@+id/unlock_dialog_parent"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:gravity="center">
 
     <LinearLayout
+        android:id="@+id/unlock_dialog"
         android:layout_width="@dimen/unlock_dialog_width"
         android:layout_height="wrap_content"
         android:gravity="center"

packages/CarSystemUI/src/com/android/systemui/statusbar/car/CarTrustAgentUnlockDialogHelper.java

@@ -52,7 +52,7 @@ class CarTrustAgentUnlockDialogHelper extends BroadcastReceiver{
      * Not using Dialog because context passed from {@link FullscreenUserSwitcher} is not an
      * activity.
      */
-    private final View mUnlockDialog;
+    private final View mUnlockDialogLayout;
     private final TextView mUnlockingText;
     private final Button mButton;
     private final IntentFilter mFilter;
@@ -70,14 +70,25 @@ class CarTrustAgentUnlockDialogHelper extends BroadcastReceiver{
         mParams.packageName = mContext.getPackageName();
         mParams.setTitle(mContext.getString(R.string.unlock_dialog_title));
 
-        mUnlockDialog = LayoutInflater.from(mContext).inflate(
+        mUnlockDialogLayout = LayoutInflater.from(mContext).inflate(
             R.layout.trust_agent_unlock_dialog, null);
-        mUnlockDialog.setLayoutParams(mParams);
+        mUnlockDialogLayout.setLayoutParams(mParams);
 
-        mUnlockingText = mUnlockDialog.findViewById(R.id.unlocking_text);
-        mButton = mUnlockDialog.findViewById(R.id.enter_pin_button);
+        View dialogParent = mUnlockDialogLayout.findViewById(R.id.unlock_dialog_parent);
+        dialogParent.setOnTouchListener((v, event)-> {
+            hideUnlockDialog(/* dismissUserSwitcher= */ false);
+            return true;
+        });
+        View unlockDialog = mUnlockDialogLayout.findViewById(R.id.unlock_dialog);
+        unlockDialog.setOnTouchListener((v, event) -> {
+            // If the person taps inside the unlock dialog, the touch event will be intercepted here
+            // and the dialog will not exit
+            return true;
+        });
+        mUnlockingText = mUnlockDialogLayout.findViewById(R.id.unlocking_text);
+        mButton = mUnlockDialogLayout.findViewById(R.id.enter_pin_button);
         mButton.setOnClickListener(v -> {
-            hideUnlockDialog(/* notifyOnHideListener= */true);
+            hideUnlockDialog(/* dismissUserSwitcher= */true);
             // TODO(b/138250105) Stop unlock advertising
         });
 
@@ -133,7 +144,7 @@ class CarTrustAgentUnlockDialogHelper extends BroadcastReceiver{
                 if (!mUserManager.isUserUnlocked(uid)) {
                     logd("Showed unlock dialog for user: " + uid + " after " + delayMillis
                             + " delay.");
-                    mWindowManager.addView(mUnlockDialog, mParams);
+                    mWindowManager.addView(mUnlockDialogLayout, mParams);
                 }
             }, delayMillis);
         }
@@ -142,22 +153,22 @@ class CarTrustAgentUnlockDialogHelper extends BroadcastReceiver{
 
     private void setUid(int uid) {
         mUid = uid;
-        TextView userName = mUnlockDialog.findViewById(R.id.user_name);
+        TextView userName = mUnlockDialogLayout.findViewById(R.id.user_name);
         userName.setText(mUserManager.getUserInfo(mUid).name);
-        ImageView avatar = mUnlockDialog.findViewById(R.id.avatar);
+        ImageView avatar = mUnlockDialogLayout.findViewById(R.id.avatar);
         avatar.setImageBitmap(mUserManager.getUserIcon(mUid));
         setButtonText();
     }
 
-    private void hideUnlockDialog(boolean notifyOnHideListener) {
+    private void hideUnlockDialog(boolean dismissUserSwitcher) {
         if (!mIsDialogShowing) {
             return;
         }
-        mWindowManager.removeView(mUnlockDialog);
+        mWindowManager.removeView(mUnlockDialogLayout);
         logd("Receiver unregistered");
         mContext.unregisterReceiver(this);
-        if (notifyOnHideListener && mOnHideListener != null) {
-            mOnHideListener.onHide();
+        if (mOnHideListener != null) {
+            mOnHideListener.onHide(dismissUserSwitcher);
         }
         mIsDialogShowing = false;
     }
@@ -240,6 +251,6 @@ class CarTrustAgentUnlockDialogHelper extends BroadcastReceiver{
      * Listener used to notify when the dialog is hidden
      */
     interface OnHideListener {
-        void onHide();
+        void onHide(boolean dismissUserSwitcher);
     }
 }

packages/CarSystemUI/src/com/android/systemui/statusbar/car/FullscreenUserSwitcher.java

@@ -34,6 +34,7 @@ import android.view.ViewStub;
 import androidx.recyclerview.widget.GridLayoutManager;
 
 import com.android.systemui.R;
+import com.android.systemui.statusbar.car.CarTrustAgentUnlockDialogHelper.OnHideListener;
 import com.android.systemui.statusbar.car.UserGridRecyclerView.UserRecord;
 
 /**
@@ -116,7 +117,7 @@ public class FullscreenUserSwitcher {
         // Show unlock dialog for initial user
         if (hasTrustedDevice(initialUser)) {
             mUnlockDialogHelper.showUnlockDialogAfterDelay(initialUser,
-                    () -> dismissUserSwitcher());
+                    mOnHideListener);
         }
     }
 
@@ -162,7 +163,7 @@ public class FullscreenUserSwitcher {
     private void onUserSelected(UserGridRecyclerView.UserRecord record) {
         mSelectedUser = record;
         if (hasTrustedDevice(record.mInfo.id)) {
-            mUnlockDialogHelper.showUnlockDialog(record.mInfo.id, () -> dismissUserSwitcher());
+            mUnlockDialogHelper.showUnlockDialog(record.mInfo.id, mOnHideListener);
             return;
         }
         if (Log.isLoggable(TAG, Log.DEBUG)) {
@@ -202,4 +203,18 @@ public class FullscreenUserSwitcher {
     private boolean hasTrustedDevice(int uid) {
         return !mEnrollmentManager.getEnrolledDeviceInfoForUser(uid).isEmpty();
     }
+
+    private OnHideListener mOnHideListener = new OnHideListener() {
+        @Override
+        public void onHide(boolean dismissUserSwitcher) {
+            if (dismissUserSwitcher) {
+                dismissUserSwitcher();
+            } else {
+                // Re-draw the parent view, otherwise the unlock dialog will not be removed from
+                // the screen immediately.
+                mParent.invalidate();
+            }
+
+        }
+    };
 }