Fix a11y issues in notification history

- crash at large display sizes/landscape
- no content description for expand buttons
- no call to action on tappable notification rows

Test: manual
Fixes: 149307144
Change-Id: I63f59de66d96a55c48852e4fbf79c87c7826076f

res/values/strings.xml

@@ -8055,6 +8055,9 @@
     <!-- Notification history screen; summary when history is off [CHAR LIMIT=200] -->
     <string name="notification_history_off_title_extended">Notification history is turned off</string>
 
+    <!-- Notification history screen; content description describing what happens when you tap on a notification history entry [CHAR LIMIT=NONE] -->
+    <string name="notification_history_view_settings">view notification settings</string>
+
     <!-- Configure Notifications: setting title, whether the snooze menu is shown on notifications [CHAR LIMIT=80] -->
     <string name="snooze_options_title">Allow notification snoozing</string>
 

src/com/android/settings/notification/history/NotificationHistoryActivity.java

@@ -77,12 +77,18 @@ public class NotificationHistoryActivity extends Activity {
             final View container = viewForPackage.findViewById(R.id.list_container);
             container.setVisibility(View.GONE);
             ImageButton expand = viewForPackage.findViewById(R.id.expand);
+            expand.setContentDescription(container.getVisibility() == View.VISIBLE
+                    ? getString(R.string.condition_expand_hide)
+                    : getString(R.string.condition_expand_show));
             expand.setOnClickListener(v -> {
                     container.setVisibility(container.getVisibility() == View.VISIBLE
                             ? View.GONE : View.VISIBLE);
                     expand.setImageResource(container.getVisibility() == View.VISIBLE
                             ? R.drawable.ic_expand_less
                             : com.android.internal.R.drawable.ic_expand_more);
+                    expand.setContentDescription(container.getVisibility() == View.VISIBLE
+                            ? getString(R.string.condition_expand_hide)
+                            : getString(R.string.condition_expand_show));
             });
 
             TextView label = viewForPackage.findViewById(R.id.label);

src/com/android/settings/notification/history/NotificationHistoryViewHolder.java

@@ -26,6 +26,9 @@ import android.view.View;
 import android.widget.DateTimeView;
 import android.widget.TextView;
 
+import androidx.core.view.AccessibilityDelegateCompat;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.android.settings.R;
@@ -66,5 +69,18 @@ public class NotificationHistoryViewHolder extends RecyclerView.ViewHolder {
             intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             itemView.getContext().startActivityAsUser(intent, UserHandle.of(userId));
         });
+        ViewCompat.setAccessibilityDelegate(itemView, new AccessibilityDelegateCompat() {
+            @Override
+            public void onInitializeAccessibilityNodeInfo(View host,
+                    AccessibilityNodeInfoCompat info) {
+                super.onInitializeAccessibilityNodeInfo(host, info);
+                CharSequence description =
+                        host.getResources().getText(R.string.notification_history_view_settings);
+                AccessibilityNodeInfoCompat.AccessibilityActionCompat customClick =
+                        new AccessibilityNodeInfoCompat.AccessibilityActionCompat(
+                                AccessibilityNodeInfoCompat.ACTION_CLICK, description);
+                info.addAction(customClick);
+            }
+        });
     }
 }

src/com/android/settings/notification/history/NotificationSbnAdapter.java

@@ -28,6 +28,7 @@ import android.os.UserHandle;
 import android.service.notification.StatusBarNotification;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.Slog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -70,17 +71,21 @@ public class NotificationSbnAdapter extends
     public void onBindViewHolder(final @NonNull NotificationSbnViewHolder holder,
             int position) {
         final StatusBarNotification sbn = mValues.get(position);
-        holder.setIcon(loadIcon(sbn));
-        holder.setPackageName(loadPackageName(sbn.getPackageName()).toString());
-        holder.setTitle(getTitleString(sbn.getNotification()));
-        holder.setSummary(getTextString(mContext, sbn.getNotification()));
-        holder.setPostedTime(sbn.getPostTime());
-        if (!mUserBadgeCache.containsKey(sbn.getUserId())) {
-            Drawable profile = mContext.getPackageManager().getUserBadgeForDensity(
-                    UserHandle.of(sbn.getUserId()), -1);
-            mUserBadgeCache.put(sbn.getUserId(), profile);
+        if (sbn != null) {
+            holder.setIcon(loadIcon(sbn));
+            holder.setPackageName(loadPackageName(sbn.getPackageName()).toString());
+            holder.setTitle(getTitleString(sbn.getNotification()));
+            holder.setSummary(getTextString(mContext, sbn.getNotification()));
+            holder.setPostedTime(sbn.getPostTime());
+            if (!mUserBadgeCache.containsKey(sbn.getUserId())) {
+                Drawable profile = mContext.getPackageManager().getUserBadgeForDensity(
+                        UserHandle.of(sbn.getUserId()), -1);
+                mUserBadgeCache.put(sbn.getUserId(), profile);
+            }
+            holder.setProfileBadge(mUserBadgeCache.get(sbn.getUserId()));
+        } else {
+            Slog.w(TAG, "null entry in list at position " + position);
         }
-        holder.setProfileBadge(mUserBadgeCache.get(sbn.getUserId()));
     }
 
     @Override