Add group name into channel summary, if applicable.

Bug: 36642898
Test: ran integration & robo tests (no new failures); verified manually with apps with channels & without.

Change-Id: I16a255b0e5d929f4485d3725bd18179e6f411c03

res/values/strings.xml

@@ -8830,4 +8830,8 @@
 
     <!-- Summary label for new device suggestion, which is displayed in Settings homepage [CHAR LIMIT=100] -->
     <string name="new_device_suggestion_summary">Check out the top 5 features</string>
+
+    <!-- The divider symbol between different parts of the notification header including spaces. not translatable [CHAR LIMIT=3] -->
+    <string name="notification_header_divider_symbol_with_spaces" translatable="false">" • "</string>
+
 </resources>

src/com/android/settings/notification/ChannelNotificationSettings.java

@@ -18,13 +18,17 @@ package com.android.settings.notification;
 
 import android.app.Activity;
 import android.app.NotificationChannel;
+import android.app.NotificationChannelGroup;
 import android.app.NotificationManager;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.os.AsyncTask;
 import android.provider.Settings;
 import android.support.v7.preference.Preference;
 import android.text.TextUtils;
+import android.text.BidiFormatter;
+import android.text.SpannableStringBuilder;
 import android.util.ArrayMap;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -60,6 +64,8 @@ public class ChannelNotificationSettings extends NotificationSettingsBase {
     private RestrictedSwitchPreference mVibrate;
     private NotificationSoundPreference mRingtone;
     private FooterPreference mFooter;
+    private NotificationChannelGroup mChannelGroup;
+    private EntityHeaderController mHeaderPref;
 
     @Override
     public int getMetricsCategory() {
@@ -89,6 +95,27 @@ public class ChannelNotificationSettings extends NotificationSettingsBase {
             mShowLegacyChannelConfig = true;
         } else {
             populateUpgradedChannelPrefs();
+
+            if (mChannel.getGroup() != null) {
+                // Go look up group name
+                new AsyncTask<Void, Void, Void>() {
+                    @Override
+                    protected Void doInBackground(Void... unused) {
+                        if (mChannel.getGroup() != null) {
+                            mChannelGroup = mBackend.getGroup(mChannel.getGroup(), mPkg, mUid);
+                        }
+                        return null;
+                    }
+
+                    @Override
+                    protected void onPostExecute(Void unused) {
+                        if (getHost() == null || mChannelGroup == null) {
+                            return;
+                        }
+                        setChannelGroupLabel(mChannelGroup.getName());
+                    }
+                }.execute();
+            }
         }
 
         updateDependents(mChannel.getImportance() == IMPORTANCE_NONE);
@@ -110,9 +137,10 @@ public class ChannelNotificationSettings extends NotificationSettingsBase {
         rows.put(mAppRow.pkg, mAppRow);
         collectConfigActivities(rows);
         final Activity activity = getActivity();
-        final Preference pref = EntityHeaderController
+        mHeaderPref = EntityHeaderController
                 .newInstance(activity, this /* fragment */, null /* header */)
-                .setRecyclerView(getListView(), getLifecycle())
+                .setRecyclerView(getListView(), getLifecycle());
+        final Preference pref = mHeaderPref
                 .setIcon(mAppRow.icon)
                 .setLabel(mChannel.getName())
                 .setSummary(mAppRow.label)
@@ -124,6 +152,20 @@ public class ChannelNotificationSettings extends NotificationSettingsBase {
         getPreferenceScreen().addPreference(pref);
     }
 
+    private void setChannelGroupLabel(CharSequence groupName) {
+        final SpannableStringBuilder summary = new SpannableStringBuilder();
+        BidiFormatter bidi = BidiFormatter.getInstance();
+        summary.append(bidi.unicodeWrap(mAppRow.label.toString()));
+        if (groupName != null) {
+            summary.append(bidi.unicodeWrap(mContext.getText(
+                    R.string.notification_header_divider_symbol_with_spaces)));
+            summary.append(bidi.unicodeWrap(groupName.toString()));
+        }
+        final Activity activity = getActivity();
+        mHeaderPref.setSummary(summary.toString());
+        mHeaderPref.done(activity, getPrefContext());
+    }
+
     private void addFooterPref() {
         if (!TextUtils.isEmpty(mChannel.getDescription())) {
             FooterPreference descPref = new FooterPreference(getPrefContext());

src/com/android/settings/notification/NotificationBackend.java

@@ -122,6 +122,19 @@ public class NotificationBackend {
         }
     }
 
+
+    public NotificationChannelGroup getGroup(String groupId, String pkg, int uid) {
+        if (groupId == null) {
+            return null;
+        }
+        try {
+            return sINM.getNotificationChannelGroupForPackage(groupId, pkg, uid);
+        } catch (Exception e) {
+            Log.w(TAG, "Error calling NoMan", e);
+            return null;
+        }
+    }
+
     public ParceledListSlice<NotificationChannelGroup> getChannelGroups(String pkg, int uid) {
         try {
             return sINM.getNotificationChannelGroupsForPackage(pkg, uid, false);