RankingHelper.java revision 92d456e9a62d7dadb3e21f481f7453bd82b1aa23
1/** 2 * Copyright (c) 2014, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16package com.android.server.notification; 17 18import android.app.Notification; 19import android.content.Context; 20import android.content.pm.PackageManager; 21import android.content.pm.PackageManager.NameNotFoundException; 22import android.os.UserHandle; 23import android.service.notification.NotificationListenerService.Ranking; 24import android.text.TextUtils; 25import android.util.ArrayMap; 26import android.util.Slog; 27 28import com.android.internal.R; 29 30import org.xmlpull.v1.XmlPullParser; 31import org.xmlpull.v1.XmlPullParserException; 32import org.xmlpull.v1.XmlSerializer; 33 34import java.io.IOException; 35import java.io.PrintWriter; 36import java.util.ArrayList; 37import java.util.Collections; 38import java.util.List; 39import java.util.Map; 40 41public class RankingHelper implements RankingConfig { 42 private static final String TAG = "RankingHelper"; 43 44 private static final int XML_VERSION = 1; 45 46 private static final String TAG_RANKING = "ranking"; 47 private static final String TAG_PACKAGE = "package"; 48 private static final String ATT_VERSION = "version"; 49 private static final String TAG_TOPIC = "topic"; 50 51 private static final String ATT_NAME = "name"; 52 private static final String ATT_UID = "uid"; 53 private static final String ATT_PRIORITY = "priority"; 54 private static final String ATT_VISIBILITY = "visibility"; 55 private static final String ATT_IMPORTANCE = "importance"; 56 private static final String ATT_TOPIC_ID = "id"; 57 private static final String ATT_TOPIC_LABEL = "label"; 58 59 private static final int DEFAULT_PRIORITY = Notification.PRIORITY_DEFAULT; 60 private static final int DEFAULT_VISIBILITY = Ranking.VISIBILITY_NO_OVERRIDE; 61 private static final int DEFAULT_IMPORTANCE = Ranking.IMPORTANCE_UNSPECIFIED; 62 63 private final NotificationSignalExtractor[] mSignalExtractors; 64 private final NotificationComparator mPreliminaryComparator = new NotificationComparator(); 65 private final GlobalSortKeyComparator mFinalComparator = new GlobalSortKeyComparator(); 66 67 private final ArrayMap<String, Record> mRecords = new ArrayMap<>(); // pkg|uid => Record 68 private final ArrayMap<String, NotificationRecord> mProxyByGroupTmp = new ArrayMap<>(); 69 private final ArrayMap<String, Record> mRestoredWithoutUids = new ArrayMap<>(); // pkg => Record 70 71 private final Context mContext; 72 private final RankingHandler mRankingHandler; 73 74 public RankingHelper(Context context, RankingHandler rankingHandler, 75 NotificationUsageStats usageStats, String[] extractorNames) { 76 mContext = context; 77 mRankingHandler = rankingHandler; 78 79 final int N = extractorNames.length; 80 mSignalExtractors = new NotificationSignalExtractor[N]; 81 for (int i = 0; i < N; i++) { 82 try { 83 Class<?> extractorClass = mContext.getClassLoader().loadClass(extractorNames[i]); 84 NotificationSignalExtractor extractor = 85 (NotificationSignalExtractor) extractorClass.newInstance(); 86 extractor.initialize(mContext, usageStats); 87 extractor.setConfig(this); 88 mSignalExtractors[i] = extractor; 89 } catch (ClassNotFoundException e) { 90 Slog.w(TAG, "Couldn't find extractor " + extractorNames[i] + ".", e); 91 } catch (InstantiationException e) { 92 Slog.w(TAG, "Couldn't instantiate extractor " + extractorNames[i] + ".", e); 93 } catch (IllegalAccessException e) { 94 Slog.w(TAG, "Problem accessing extractor " + extractorNames[i] + ".", e); 95 } 96 } 97 } 98 99 @SuppressWarnings("unchecked") 100 public <T extends NotificationSignalExtractor> T findExtractor(Class<T> extractorClass) { 101 final int N = mSignalExtractors.length; 102 for (int i = 0; i < N; i++) { 103 final NotificationSignalExtractor extractor = mSignalExtractors[i]; 104 if (extractorClass.equals(extractor.getClass())) { 105 return (T) extractor; 106 } 107 } 108 return null; 109 } 110 111 public void extractSignals(NotificationRecord r) { 112 final int N = mSignalExtractors.length; 113 for (int i = 0; i < N; i++) { 114 NotificationSignalExtractor extractor = mSignalExtractors[i]; 115 try { 116 RankingReconsideration recon = extractor.process(r); 117 if (recon != null) { 118 mRankingHandler.requestReconsideration(recon); 119 } 120 } catch (Throwable t) { 121 Slog.w(TAG, "NotificationSignalExtractor failed.", t); 122 } 123 } 124 } 125 126 public void readXml(XmlPullParser parser, boolean forRestore) 127 throws XmlPullParserException, IOException { 128 final PackageManager pm = mContext.getPackageManager(); 129 int type = parser.getEventType(); 130 if (type != XmlPullParser.START_TAG) return; 131 String tag = parser.getName(); 132 if (!TAG_RANKING.equals(tag)) return; 133 mRecords.clear(); 134 mRestoredWithoutUids.clear(); 135 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 136 tag = parser.getName(); 137 if (type == XmlPullParser.END_TAG && TAG_RANKING.equals(tag)) { 138 return; 139 } 140 if (type == XmlPullParser.START_TAG) { 141 if (TAG_PACKAGE.equals(tag)) { 142 int uid = safeInt(parser, ATT_UID, Record.UNKNOWN_UID); 143 int priority = safeInt(parser, ATT_PRIORITY, DEFAULT_PRIORITY); 144 int vis = safeInt(parser, ATT_VISIBILITY, DEFAULT_VISIBILITY); 145 String name = parser.getAttributeValue(null, ATT_NAME); 146 147 if (!TextUtils.isEmpty(name)) { 148 if (forRestore) { 149 try { 150 //TODO: http://b/22388012 151 uid = pm.getPackageUidAsUser(name, UserHandle.USER_SYSTEM); 152 } catch (NameNotFoundException e) { 153 // noop 154 } 155 } 156 Record r = null; 157 if (uid == Record.UNKNOWN_UID) { 158 r = mRestoredWithoutUids.get(name); 159 if (r == null) { 160 r = new Record(); 161 mRestoredWithoutUids.put(name, r); 162 } 163 } else { 164 r = getOrCreateRecord(name, uid); 165 } 166 r.importance = safeInt(parser, ATT_IMPORTANCE, DEFAULT_IMPORTANCE); 167 r.priority = priority; 168 r.visibility = vis; 169 170 // Migrate package level settings to the default topic. 171 // Might be overwritten by parseTopics. 172 Topic defaultTopic = r.topics.get(Notification.TOPIC_DEFAULT); 173 defaultTopic.priority = priority; 174 defaultTopic.visibility = vis; 175 176 parseTopics(r, parser); 177 } 178 } 179 } 180 } 181 throw new IllegalStateException("Failed to reach END_DOCUMENT"); 182 } 183 184 public void parseTopics(Record r, XmlPullParser parser) 185 throws XmlPullParserException, IOException { 186 final int innerDepth = parser.getDepth(); 187 int type; 188 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 189 && (type != XmlPullParser.END_TAG || parser.getDepth() > innerDepth)) { 190 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 191 continue; 192 } 193 194 String tagName = parser.getName(); 195 if (TAG_TOPIC.equals(tagName)) { 196 int priority = safeInt(parser, ATT_PRIORITY, DEFAULT_PRIORITY); 197 int vis = safeInt(parser, ATT_VISIBILITY, DEFAULT_VISIBILITY); 198 int importance = safeInt(parser, ATT_IMPORTANCE, DEFAULT_IMPORTANCE); 199 String id = parser.getAttributeValue(null, ATT_TOPIC_ID); 200 CharSequence label = parser.getAttributeValue(null, ATT_TOPIC_LABEL); 201 202 if (!TextUtils.isEmpty(id)) { 203 Topic topic = new Topic(new Notification.Topic(id, label)); 204 205 if (priority != DEFAULT_PRIORITY) { 206 topic.priority = priority; 207 } 208 if (vis != DEFAULT_VISIBILITY) { 209 topic.visibility = vis; 210 } 211 if (importance != DEFAULT_IMPORTANCE) { 212 topic.importance = importance; 213 } 214 r.topics.put(id, topic); 215 } 216 } 217 } 218 } 219 220 private static String recordKey(String pkg, int uid) { 221 return pkg + "|" + uid; 222 } 223 224 private Record getOrCreateRecord(String pkg, int uid) { 225 final String key = recordKey(pkg, uid); 226 Record r = mRecords.get(key); 227 if (r == null) { 228 r = new Record(); 229 r.pkg = pkg; 230 r.uid = uid; 231 r.topics.put(Notification.TOPIC_DEFAULT, new Topic(createDefaultTopic())); 232 mRecords.put(key, r); 233 } 234 return r; 235 } 236 237 public void writeXml(XmlSerializer out, boolean forBackup) throws IOException { 238 out.startTag(null, TAG_RANKING); 239 out.attribute(null, ATT_VERSION, Integer.toString(XML_VERSION)); 240 241 final int N = mRecords.size(); 242 for (int i = 0; i < N; i++) { 243 final Record r = mRecords.valueAt(i); 244 //TODO: http://b/22388012 245 if (forBackup && UserHandle.getUserId(r.uid) != UserHandle.USER_SYSTEM) { 246 continue; 247 } 248 out.startTag(null, TAG_PACKAGE); 249 out.attribute(null, ATT_NAME, r.pkg); 250 if (r.importance != DEFAULT_IMPORTANCE) { 251 out.attribute(null, ATT_IMPORTANCE, Integer.toString(r.importance)); 252 } 253 if (r.priority != DEFAULT_PRIORITY) { 254 out.attribute(null, ATT_PRIORITY, Integer.toString(r.priority)); 255 } 256 if (r.visibility != DEFAULT_VISIBILITY) { 257 out.attribute(null, ATT_VISIBILITY, Integer.toString(r.visibility)); 258 } 259 260 if (!forBackup) { 261 out.attribute(null, ATT_UID, Integer.toString(r.uid)); 262 } 263 264 writeTopicsXml(out, r); 265 out.endTag(null, TAG_PACKAGE); 266 } 267 out.endTag(null, TAG_RANKING); 268 } 269 270 public void writeTopicsXml(XmlSerializer out, Record r) throws IOException { 271 for (Topic t : r.topics.values()) { 272 out.startTag(null, TAG_TOPIC); 273 out.attribute(null, ATT_TOPIC_ID, t.topic.getId()); 274 out.attribute(null, ATT_TOPIC_LABEL, t.topic.getLabel().toString()); 275 if (t.priority != DEFAULT_PRIORITY) { 276 out.attribute(null, ATT_PRIORITY, Integer.toString(t.priority)); 277 } 278 if (t.visibility != DEFAULT_VISIBILITY) { 279 out.attribute(null, ATT_VISIBILITY, Integer.toString(t.visibility)); 280 } 281 if (t.importance != DEFAULT_IMPORTANCE) { 282 out.attribute(null, ATT_IMPORTANCE, Integer.toString(t.importance)); 283 } 284 out.endTag(null, TAG_TOPIC); 285 } 286 } 287 288 private void updateConfig() { 289 final int N = mSignalExtractors.length; 290 for (int i = 0; i < N; i++) { 291 mSignalExtractors[i].setConfig(this); 292 } 293 mRankingHandler.requestSort(); 294 } 295 296 public void sort(ArrayList<NotificationRecord> notificationList) { 297 final int N = notificationList.size(); 298 // clear global sort keys 299 for (int i = N - 1; i >= 0; i--) { 300 notificationList.get(i).setGlobalSortKey(null); 301 } 302 303 // rank each record individually 304 Collections.sort(notificationList, mPreliminaryComparator); 305 306 synchronized (mProxyByGroupTmp) { 307 // record individual ranking result and nominate proxies for each group 308 for (int i = N - 1; i >= 0; i--) { 309 final NotificationRecord record = notificationList.get(i); 310 record.setAuthoritativeRank(i); 311 final String groupKey = record.getGroupKey(); 312 boolean isGroupSummary = record.getNotification().isGroupSummary(); 313 if (isGroupSummary || !mProxyByGroupTmp.containsKey(groupKey)) { 314 mProxyByGroupTmp.put(groupKey, record); 315 } 316 } 317 // assign global sort key: 318 // is_recently_intrusive:group_rank:is_group_summary:group_sort_key:rank 319 for (int i = 0; i < N; i++) { 320 final NotificationRecord record = notificationList.get(i); 321 NotificationRecord groupProxy = mProxyByGroupTmp.get(record.getGroupKey()); 322 String groupSortKey = record.getNotification().getSortKey(); 323 324 // We need to make sure the developer provided group sort key (gsk) is handled 325 // correctly: 326 // gsk="" < gsk=non-null-string < gsk=null 327 // 328 // We enforce this by using different prefixes for these three cases. 329 String groupSortKeyPortion; 330 if (groupSortKey == null) { 331 groupSortKeyPortion = "nsk"; 332 } else if (groupSortKey.equals("")) { 333 groupSortKeyPortion = "esk"; 334 } else { 335 groupSortKeyPortion = "gsk=" + groupSortKey; 336 } 337 338 boolean isGroupSummary = record.getNotification().isGroupSummary(); 339 record.setGlobalSortKey( 340 String.format("intrsv=%c:grnk=0x%04x:gsmry=%c:%s:rnk=0x%04x", 341 record.isRecentlyIntrusive() ? '0' : '1', 342 groupProxy.getAuthoritativeRank(), 343 isGroupSummary ? '0' : '1', 344 groupSortKeyPortion, 345 record.getAuthoritativeRank())); 346 } 347 mProxyByGroupTmp.clear(); 348 } 349 350 // Do a second ranking pass, using group proxies 351 Collections.sort(notificationList, mFinalComparator); 352 } 353 354 public int indexOf(ArrayList<NotificationRecord> notificationList, NotificationRecord target) { 355 return Collections.binarySearch(notificationList, target, mFinalComparator); 356 } 357 358 private static int safeInt(XmlPullParser parser, String att, int defValue) { 359 final String val = parser.getAttributeValue(null, att); 360 return tryParseInt(val, defValue); 361 } 362 363 private static int tryParseInt(String value, int defValue) { 364 if (TextUtils.isEmpty(value)) return defValue; 365 try { 366 return Integer.valueOf(value); 367 } catch (NumberFormatException e) { 368 return defValue; 369 } 370 } 371 372 private static boolean safeBool(XmlPullParser parser, String att, boolean defValue) { 373 final String val = parser.getAttributeValue(null, att); 374 return tryParseBool(val, defValue); 375 } 376 377 private static boolean tryParseBool(String value, boolean defValue) { 378 if (TextUtils.isEmpty(value)) return defValue; 379 return Boolean.valueOf(value); 380 } 381 382 @Override 383 public List<Notification.Topic> getTopics(String packageName, int uid) { 384 final Record r = getOrCreateRecord(packageName, uid); 385 List<Notification.Topic> topics = new ArrayList<>(); 386 for (Topic t : r.topics.values()) { 387 topics.add(t.topic); 388 } 389 return topics; 390 } 391 392 /** 393 * Gets priority. If a topic is given, returns the priority of that topic. Otherwise, the 394 * priority of the app. 395 */ 396 @Override 397 public int getPriority(String packageName, int uid, Notification.Topic topic) { 398 final Record r = getOrCreateRecord(packageName, uid); 399 if (topic == null) { 400 return r.priority; 401 } 402 return getOrCreateTopic(r, topic).priority; 403 } 404 405 /** 406 * Sets priority. If a topic is given, sets the priority of that topic. If not, 407 * sets the default priority for all new topics that appear in the future, and resets 408 * the priority of all current topics. 409 */ 410 @Override 411 public void setPriority(String packageName, int uid, Notification.Topic topic, 412 int priority) { 413 final Record r = getOrCreateRecord(packageName, uid); 414 if (topic == null) { 415 r.priority = priority; 416 for (Topic t : r.topics.values()) { 417 t.priority = priority; 418 } 419 } else { 420 getOrCreateTopic(r, topic).priority = priority; 421 } 422 updateConfig(); 423 } 424 425 /** 426 * Gets visual override. If a topic is given, returns the override of that topic. Otherwise, the 427 * override of the app. 428 */ 429 @Override 430 public int getVisibilityOverride(String packageName, int uid, Notification.Topic topic) { 431 final Record r = getOrCreateRecord(packageName, uid); 432 if (topic == null) { 433 return r.visibility; 434 } 435 return getOrCreateTopic(r, topic).visibility; 436 } 437 438 /** 439 * Sets visibility override. If a topic is given, sets the override of that topic. If not, 440 * sets the default override for all new topics that appear in the future, and resets 441 * the override of all current topics. 442 */ 443 @Override 444 public void setVisibilityOverride(String pkgName, int uid, Notification.Topic topic, 445 int visibility) { 446 final Record r = getOrCreateRecord(pkgName, uid); 447 if (topic == null) { 448 r.visibility = visibility; 449 for (Topic t : r.topics.values()) { 450 t.visibility = visibility; 451 } 452 } else { 453 getOrCreateTopic(r, topic).visibility = visibility; 454 } 455 updateConfig(); 456 } 457 458 /** 459 * Gets importance. If a topic is given, returns the importance of that topic. Otherwise, the 460 * importance of the app. 461 */ 462 @Override 463 public int getImportance(String packageName, int uid, Notification.Topic topic) { 464 final Record r = getOrCreateRecord(packageName, uid); 465 if (topic == null) { 466 return r.importance; 467 } 468 return getOrCreateTopic(r, topic).importance; 469 } 470 471 /** 472 * Sets importance. If a topic is given, sets the importance of that topic. If not, sets the 473 * default importance for all new topics that appear in the future, and resets 474 * the importance of all current topics (unless the app is being blocked). 475 */ 476 @Override 477 public void setImportance(String pkgName, int uid, Notification.Topic topic, 478 int importance) { 479 final Record r = getOrCreateRecord(pkgName, uid); 480 if (topic == null) { 481 r.importance = importance; 482 if (Ranking.IMPORTANCE_NONE != importance) { 483 for (Topic t : r.topics.values()) { 484 t.importance = importance; 485 } 486 } 487 } else { 488 getOrCreateTopic(r, topic).importance = importance; 489 } 490 updateConfig(); 491 } 492 493 @Override 494 public boolean doesAppUseTopics(String pkgName, int uid) { 495 final Record r = getOrCreateRecord(pkgName, uid); 496 int numTopics = r.topics.size(); 497 if (numTopics == 0 498 || (numTopics == 1 && r.topics.containsKey(Notification.TOPIC_DEFAULT))) { 499 return false; 500 } else { 501 return true; 502 } 503 } 504 505 private Topic getOrCreateTopic(Record r, Notification.Topic topic) { 506 if (topic == null) { 507 topic = createDefaultTopic(); 508 } 509 Topic t = r.topics.get(topic.getId()); 510 if (t != null) { 511 return t; 512 } else { 513 t = new Topic(topic); 514 t.importance = r.importance; 515 t.priority = r.priority; 516 t.visibility = r.visibility; 517 r.topics.put(topic.getId(), t); 518 return t; 519 } 520 } 521 522 private Notification.Topic createDefaultTopic() { 523 return new Notification.Topic(Notification.TOPIC_DEFAULT, 524 mContext.getString(R.string.default_notification_topic_label)); 525 } 526 527 public void dump(PrintWriter pw, String prefix, NotificationManagerService.DumpFilter filter) { 528 if (filter == null) { 529 final int N = mSignalExtractors.length; 530 pw.print(prefix); 531 pw.print("mSignalExtractors.length = "); 532 pw.println(N); 533 for (int i = 0; i < N; i++) { 534 pw.print(prefix); 535 pw.print(" "); 536 pw.println(mSignalExtractors[i]); 537 } 538 } 539 if (filter == null) { 540 pw.print(prefix); 541 pw.println("per-package config:"); 542 } 543 pw.println("Records:"); 544 dumpRecords(pw, prefix, filter, mRecords); 545 pw.println("Restored without uid:"); 546 dumpRecords(pw, prefix, filter, mRestoredWithoutUids); 547 } 548 549 private static void dumpRecords(PrintWriter pw, String prefix, 550 NotificationManagerService.DumpFilter filter, ArrayMap<String, Record> records) { 551 final int N = records.size(); 552 for (int i = 0; i < N; i++) { 553 final Record r = records.valueAt(i); 554 if (filter == null || filter.matches(r.pkg)) { 555 pw.print(prefix); 556 pw.print(" "); 557 pw.print(r.pkg); 558 pw.print(" ("); 559 pw.print(r.uid == Record.UNKNOWN_UID ? "UNKNOWN_UID" : Integer.toString(r.uid)); 560 pw.print(')'); 561 if (r.importance != DEFAULT_IMPORTANCE) { 562 pw.print(" importance="); 563 pw.print(Ranking.importanceToString(r.importance)); 564 } 565 if (r.priority != DEFAULT_PRIORITY) { 566 pw.print(" priority="); 567 pw.print(Ranking.importanceToString(r.priority)); 568 } 569 if (r.visibility != DEFAULT_VISIBILITY) { 570 pw.print(" visibility="); 571 pw.print(Ranking.importanceToString(r.visibility)); 572 } 573 pw.println(); 574 for (Topic t : r.topics.values()) { 575 pw.print(prefix); 576 pw.print(" "); 577 pw.print(" "); 578 pw.print(t.topic.getId()); 579 if (t.priority != DEFAULT_PRIORITY) { 580 pw.print(" priority="); 581 pw.print(Notification.priorityToString(t.priority)); 582 } 583 if (t.visibility != DEFAULT_VISIBILITY) { 584 pw.print(" visibility="); 585 pw.print(Notification.visibilityToString(t.visibility)); 586 } 587 if (t.importance != DEFAULT_IMPORTANCE) { 588 pw.print(" importance="); 589 pw.print(Ranking.importanceToString(t.importance)); 590 } 591 pw.println(); 592 } 593 } 594 } 595 } 596 597 public void onPackagesChanged(boolean queryReplace, String[] pkgList) { 598 if (queryReplace || pkgList == null || pkgList.length == 0 599 || mRestoredWithoutUids.isEmpty()) { 600 return; // nothing to do 601 } 602 final PackageManager pm = mContext.getPackageManager(); 603 boolean updated = false; 604 for (String pkg : pkgList) { 605 final Record r = mRestoredWithoutUids.get(pkg); 606 if (r != null) { 607 try { 608 //TODO: http://b/22388012 609 r.uid = pm.getPackageUidAsUser(r.pkg, UserHandle.USER_SYSTEM); 610 mRestoredWithoutUids.remove(pkg); 611 mRecords.put(recordKey(r.pkg, r.uid), r); 612 updated = true; 613 } catch (NameNotFoundException e) { 614 // noop 615 } 616 } 617 } 618 if (updated) { 619 updateConfig(); 620 } 621 } 622 623 private static class Record { 624 static int UNKNOWN_UID = UserHandle.USER_NULL; 625 626 String pkg; 627 int uid = UNKNOWN_UID; 628 int importance = DEFAULT_IMPORTANCE; 629 int priority = DEFAULT_PRIORITY; 630 int visibility = DEFAULT_VISIBILITY; 631 Map<String, Topic> topics = new ArrayMap<>(); 632 } 633 634 private static class Topic { 635 Notification.Topic topic; 636 int priority = DEFAULT_PRIORITY; 637 int visibility = DEFAULT_VISIBILITY; 638 int importance = DEFAULT_IMPORTANCE; 639 640 public Topic(Notification.Topic topic) { 641 this.topic = topic; 642 } 643 } 644} 645