Android中Notification的framework层讲解【安卓源码解析四】

分类： android源码解析 2011-12-18 17:23 251人阅读 评论(0) 收藏 举报

android的notificaiton的声音sound也是申请的AudioManager机制来播放声音的。最近让我找恢复出厂设置后，手机刚启动，接受短信没有声音，如果恢复出厂设置后，等一会儿，过个2分钟再接受短信，就有铃声了。下面我把我分析代码的方法写下来，给自己和读者一些启发：

日历也是用的是Notification，但是恢复出厂设置后，立马设置日历后，日历可以出声音，我看日历的代码，结果发现日历只是用了Notification的闪屏，真正声音是日历自己实现了Mediaplayer来出声音的。所以我又不得不老老实实地研究Notification.sound到底把声音传递到什么地方去了？

转载请标明出处：http://blog.csdn.net/wdaming1986/article/details/7081787

首先，我在短信的com.android.mms.transaction包中的MessagingNotification的573行的java代码：notification.sound = TextUtils.isEmpty(ringtoneStr) ? null : Uri.parse(ringtoneStr);打log查看，发现这个uri确实是存在的，我推测：就是说这个uri传给了framework一层，但是framework一层有没有执行完的动作，所以不响。为了验证是不是短信的错误，我自己单独写了个notification的例子，一个按钮，点击就发出声音。这个例子在正常情况下能正常发声。我就恢复出厂设置后，运行这个例子，结果发现没有声音，这就充分验证了我的猜测。我就去framework去着notificaion.sound = 的声音传递给framework做什么事情了？？

接着，在Source Insight软件中导入framework整个工程，然后搜索，notificaiton.sounds，结果搜到了，在framework/base/core/java/android/app/Notification.java类。

[java] view plain copy print ?

1. /*
2. *Copyright(C)2007TheAndroidOpenSourceProject
3. *
4. *LicensedundertheApacheLicense,Version2.0(the"License");
5. *youmaynotusethisfileexceptincompliancewiththeLicense.
6. *YoumayobtainacopyoftheLicenseat
7. *
8. *http://www.apache.org/licenses/LICENSE-2.0
9. *
10. *Unlessrequiredbyapplicablelaworagreedtoinwriting,software
11. *distributedundertheLicenseisdistributedonan"ASIS"BASIS,
12. *WITHOUTWARRANTIESORCONDITIONSOFANYKIND,eitherexpressorimplied.
13. *SeetheLicenseforthespecificlanguagegoverningpermissionsand
14. *limitationsundertheLicense.
15. */
17. packageandroid.app;
19. importjava.util.Date;
21. importandroid.app.PendingIntent;
22. importandroid.content.Context;
23. importandroid.content.Intent;
24. importandroid.media.AudioManager;
25. importandroid.net.Uri;
26. importandroid.os.Parcel;
27. importandroid.os.Parcelable;
28. importandroid.text.TextUtils;
29. importandroid.text.format.DateFormat;
30. importandroid.text.format.DateUtils;
31. importandroid.widget.RemoteViews;
33. /**
34. *Aclassthatrepresentshowapersistentnotificationistobepresentedto
35. *theuserusingthe{@linkandroid.app.NotificationManager}.
36. *
37. *<p>Foraguidetocreatingnotifications,seethe
38. *<ahref="{@docRoot}guide/topics/ui/notifiers/notifications.html">CreatingStatus
39. *BarNotifications</a>documentintheDevGuide.</p>
40. */
41. publicclassNotificationimplementsParcelable
42. {
43. /**
44. *Usealldefaultvalues(whereapplicable).
45. */
46. publicstaticfinalintDEFAULT_ALL=~0;
48. /**
49. *Usethedefaultnotificationsound.Thiswillignoreanygiven
50. *{@link#sound}.
51. *
52. *@see#defaults
53. */
54. publicstaticfinalintDEFAULT_SOUND=1;
56. /**
57. *Usethedefaultnotificationvibrate.Thiswillignoreanygiven
58. *{@link#vibrate}.Usingphonevibrationrequiresthe
59. *{@linkandroid.Manifest.permission#VIBRATEVIBRATE}permission.
60. *
61. *@see#defaults
62. */
63. publicstaticfinalintDEFAULT_VIBRATE=2;
65. /**
66. *Usethedefaultnotificationlights.Thiswillignorethe
67. *{@link#FLAG_SHOW_LIGHTS}bit,and{@link#ledARGB},{@link#ledOffMS},or
68. *{@link#ledOnMS}.
69. *
70. *@see#defaults
71. */
72. publicstaticfinalintDEFAULT_LIGHTS=4;
74. /**
75. *Thetimestampforthenotification.Theiconsandexpandedviews
76. *aresortedbythiskey.
77. */
78. publiclongwhen;
80. /**
81. *Theresourceidofadrawabletouseastheiconinthestatusbar.
82. */
83. publicinticon;
85. /**
86. *Thenumberofeventsthatthisnotificationrepresents.Forexample,inanewmail
87. *notification,thiscouldbethenumberofunreadmessages.Thisnumberissuperimposedover
88. *theiconinthestatusbar.Ifthenumberis0ornegative,itisnotshowninthestatus
89. *bar.
90. */
91. publicintnumber;
93. /**
94. *Theintenttoexecutewhentheexpandedstatusentryisclicked.If
95. *thisisanactivity,itmustincludethe
96. *{@linkandroid.content.Intent#FLAG_ACTIVITY_NEW_TASK}flag,whichrequires
97. *thatyoutakecareoftaskmanagementasdescribedinthe<em>ActivitiesandTasks</em>
98. *sectionofthe<ahref="{@docRoot}guide/topics/fundamentals.html#acttask">Application
99. *Fundamentals</a>document.
100. */
101. publicPendingIntentcontentIntent;
103. /**
104. *Theintenttoexecutewhenthestatusentryisdeletedbytheuser
105. *withthe"ClearAllNotifications"button.Thisprobablyshouldn't
106. *belaunchinganactivitysinceseveralofthosewillbesentatthe
107. *sametime.
108. */
109. publicPendingIntentdeleteIntent;
111. /**
112. *Anintenttolaunchinsteadofpostingthenotificationtothestatusbar.
113. *Onlyforusewithextremelyhigh-prioritynotificationsdemandingtheuser's
114. *<strong>immediate</strong>attention,suchasanincomingphonecallor
115. *alarmclockthattheuserhasexplicitlysettoaparticulartime.
116. *Ifthisfacilityisusedforsomethingelse,pleasegivetheuseranoption
117. *toturnitoffanduseanormalnotification,asthiscanbeextremely
118. *disruptive.
119. */
120. publicPendingIntentfullScreenIntent;
122. /**
123. *Texttoscrollacrossthescreenwhenthisitemisaddedto
124. *thestatusbar.
125. */
126. publicCharSequencetickerText;
128. /**
129. *Theviewthatwillrepresentthisnotificationintheexpandedstatusbar.
130. */
131. publicRemoteViewscontentView;
133. /**
134. *Iftheiconinthestatusbaristohavemorethanonelevel,youcansetthis.Otherwise,
135. *leaveitatitsdefaultvalueof0.
136. *
137. *@seeandroid.widget.ImageView#setImageLevel
138. *@seeandroid.graphics.drawable#setLevel
139. */
140. publicinticonLevel;
142. /**
143. *Thesoundtoplay.
144. *
145. *<p>
146. *Toplaythedefaultnotificationsound,see{@link#defaults}.
147. *</p>
148. */
149. publicUrisound;
151. /**
152. *UsethisconstantasthevalueforaudioStreamTypetorequestthat
153. *thedefaultstreamtypefornotificationsbeused.Currentlythe
154. *defaultstreamtypeisSTREAM_RING.
155. */
156. publicstaticfinalintSTREAM_DEFAULT=-1;
158. /**
159. *Theaudiostreamtypetousewhenplayingthesound.
160. *ShouldbeoneoftheSTREAM_constantsfrom
161. *{@linkandroid.media.AudioManager}.
162. */
163. publicintaudioStreamType=STREAM_DEFAULT;
166. /**
167. *Thepatternwithwhichtovibrate.
168. *
169. *<p>
170. *Tovibratethedefaultpattern,see{@link#defaults}.
171. *</p>
172. *
173. *@seeandroid.os.Vibrator#vibrate(long[],int)
174. */
175. publiclong[]vibrate;
177. /**
178. *Thecoloroftheled.Thehardwarewilldoitsbestapproximation.
179. *
180. *@see#FLAG_SHOW_LIGHTS
181. *@see#flags
182. */
183. publicintledARGB;
185. /**
186. *ThenumberofmillisecondsfortheLEDtobeonwhileit'sflashing.
187. *Thehardwarewilldoitsbestapproximation.
188. *
189. *@see#FLAG_SHOW_LIGHTS
190. *@see#flags
191. */
192. publicintledOnMS;
194. /**
195. *ThenumberofmillisecondsfortheLEDtobeoffwhileit'sflashing.
196. *Thehardwarewilldoitsbestapproximation.
197. *
198. *@see#FLAG_SHOW_LIGHTS
199. *@see#flags
200. */
201. publicintledOffMS;
203. /**
204. *Specifieswhichvaluesshouldbetakenfromthedefaults.
205. *<p>
206. *Toset,ORthedesiredfrom{@link#DEFAULT_SOUND},
207. *{@link#DEFAULT_VIBRATE},{@link#DEFAULT_LIGHTS}.Foralldefault
208. *values,use{@link#DEFAULT_ALL}.
209. *</p>
210. */
211. publicintdefaults;
214. /**
215. *Bittobebitwise-oredintothe{@link#flags}fieldthatshouldbe
216. *setifyouwanttheLEDonforthisnotification.
217. *<ul>
218. *<li>ToturntheLEDoff,pass0inthealphachannelforcolorARGB
219. *or0forbothledOnMSandledOffMS.</li>
220. *<li>ToturntheLEDon,pass1forledOnMSand0forledOffMS.</li>
221. *<li>ToflashtheLED,passthenumberofmillisecondsthatitshould
222. *beonandofftoledOnMSandledOffMS.</li>
223. *</ul>
224. *<p>
225. *Sincehardwarevaries,youarenotguaranteedthatanyofthevalues
226. *youpassarehonoredexactly.Usethesystemdefaults(TODO)ifpossible
227. *becausetheywillbesettovaluesthatworkonanygivenhardware.
228. *<p>
229. *Thealphachannelmustbesetforforwardcompatibility.
230. *
231. */
232. publicstaticfinalintFLAG_SHOW_LIGHTS=0x00000001;
234. /**
235. *Bittobebitwise-oredintothe{@link#flags}fieldthatshouldbe
236. *setifthisnotificationisinreferencetosomethingthatisongoing,
237. *likeaphonecall.Itshouldnotbesetifthisnotificationisin
238. *referencetosomethingthathappenedataparticularpointintime,
239. *likeamissedphonecall.
240. */
241. publicstaticfinalintFLAG_ONGOING_EVENT=0x00000002;
243. /**
244. *Bittobebitwise-oredintothe{@link#flags}fieldthatifset,
245. *theaudiowillberepeateduntilthenotificationis
246. *cancelledorthenotificationwindowisopened.
247. */
248. publicstaticfinalintFLAG_INSISTENT=0x00000004;
250. /**
251. *Bittobebitwise-oredintothe{@link#flags}fieldthatshouldbe
252. *setifyouwantthesoundand/orvibrationplayeachtimethe
253. *notificationissent,evenifithasnotbeencanceledbeforethat.
254. */
255. publicstaticfinalintFLAG_ONLY_ALERT_ONCE=0x00000008;
257. /**
258. *Bittobebitwise-oredintothe{@link#flags}fieldthatshouldbe
259. *setifthenotificationshouldbecanceledwhenitisclickedbythe
260. *user.
261. */
262. publicstaticfinalintFLAG_AUTO_CANCEL=0x00000010;
264. /**
265. *Bittobebitwise-oredintothe{@link#flags}fieldthatshouldbe
266. *setifthenotificationshouldnotbecanceledwhentheuserclicks
267. *theClearallbutton.
268. */
269. publicstaticfinalintFLAG_NO_CLEAR=0x00000020;
271. /**
272. *Bittobebitwise-oredintothe{@link#flags}fieldthatshouldbe
273. *setifthisnotificationrepresentsacurrentlyrunningservice.This
274. *willnormallybesetforyouby{@linkService#startForeground}.
275. */
276. publicstaticfinalintFLAG_FOREGROUND_SERVICE=0x00000040;
278. publicintflags;
280. /**
281. *ConstructsaNotificationobjectwitheverythingsetto0.
282. */
283. publicNotification()
284. {
285. this.when=System.currentTimeMillis();
286. }
288. /**
289. *@deprecateduse{@link#Notification(int,CharSequence,long)}and{@link#setLatestEventInfo}.
290. *@hide
291. */
292. publicNotification(Contextcontext,inticon,CharSequencetickerText,longwhen,
293. CharSequencecontentTitle,CharSequencecontentText,IntentcontentIntent)
294. {
295. this.when=when;
296. this.icon=icon;
297. this.tickerText=tickerText;
298. setLatestEventInfo(context,contentTitle,contentText,
299. PendingIntent.getActivity(context,0,contentIntent,0));
300. }
302. /**
303. *ConstructsaNotificationobjectwiththeinformationneededto
304. *haveastatusbariconwithoutthestandardexpandedview.
305. *
306. *@paramiconTheresourceidoftheicontoputinthestatusbar.
307. *@paramtickerTextThetextthatflowsbyinthestatusbarwhenthenotificationfirst
308. *activates.
309. *@paramwhenThetimetoshowinthetimefield.IntheSystem.currentTimeMillis
310. *timebase.
311. */
312. publicNotification(inticon,CharSequencetickerText,longwhen)
313. {
314. this.icon=icon;
315. this.tickerText=tickerText;
316. this.when=when;
317. }
319. /**
320. *Unflattenthenotificationfromaparcel.
321. */
322. publicNotification(Parcelparcel)
323. {
324. intversion=parcel.readInt();
326. when=parcel.readLong();
327. icon=parcel.readInt();
328. number=parcel.readInt();
329. if(parcel.readInt()!=0){
330. contentIntent=PendingIntent.CREATOR.createFromParcel(parcel);
331. }
332. if(parcel.readInt()!=0){
333. deleteIntent=PendingIntent.CREATOR.createFromParcel(parcel);
334. }
335. if(parcel.readInt()!=0){
336. tickerText=TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel);
337. }
338. if(parcel.readInt()!=0){
339. contentView=RemoteViews.CREATOR.createFromParcel(parcel);
340. }
341. defaults=parcel.readInt();
342. flags=parcel.readInt();
343. if(parcel.readInt()!=0){
344. sound=Uri.CREATOR.createFromParcel(parcel);
345. }
347. audioStreamType=parcel.readInt();
348. vibrate=parcel.createLongArray();
349. ledARGB=parcel.readInt();
350. ledOnMS=parcel.readInt();
351. ledOffMS=parcel.readInt();
352. iconLevel=parcel.readInt();
354. if(parcel.readInt()!=0){
355. fullScreenIntent=PendingIntent.CREATOR.createFromParcel(parcel);
356. }
357. }
359. publicNotificationclone(){
360. Notificationthat=newNotification();
362. that.when=this.when;
363. that.icon=this.icon;
364. that.number=this.number;
366. //PendingIntentsareglobal,sothere'snoreason(orway)toclonethem.
367. that.contentIntent=this.contentIntent;
368. that.deleteIntent=this.deleteIntent;
369. that.fullScreenIntent=this.fullScreenIntent;
371. if(this.tickerText!=null){
372. that.tickerText=this.tickerText.toString();
373. }
374. if(this.contentView!=null){
375. that.contentView=this.contentView.clone();
376. }
377. that.iconLevel=that.iconLevel;
378. that.sound=this.sound;//android.net.Uriisimmutable
379. that.audioStreamType=this.audioStreamType;
381. finallong[]vibrate=this.vibrate;
382. if(vibrate!=null){
383. finalintN=vibrate.length;
384. finallong[]vib=that.vibrate=newlong[N];
385. System.arraycopy(vibrate,0,vib,0,N);
386. }
388. that.ledARGB=this.ledARGB;
389. that.ledOnMS=this.ledOnMS;
390. that.ledOffMS=this.ledOffMS;
391. that.defaults=this.defaults;
393. that.flags=this.flags;
395. returnthat;
396. }
398. publicintdescribeContents(){
399. return0;
400. }
402. /**
403. *Flattenthisnotificationfromaparcel.
404. */
405. publicvoidwriteToParcel(Parcelparcel,intflags)
406. {
407. parcel.writeInt(1);
409. parcel.writeLong(when);
410. parcel.writeInt(icon);
411. parcel.writeInt(number);
412. if(contentIntent!=null){
413. parcel.writeInt(1);
414. contentIntent.writeToParcel(parcel,0);
415. }else{
416. parcel.writeInt(0);
417. }
418. if(deleteIntent!=null){
419. parcel.writeInt(1);
420. deleteIntent.writeToParcel(parcel,0);
421. }else{
422. parcel.writeInt(0);
423. }
424. if(tickerText!=null){
425. parcel.writeInt(1);
426. TextUtils.writeToParcel(tickerText,parcel,flags);
427. }else{
428. parcel.writeInt(0);
429. }
430. if(contentView!=null){
431. parcel.writeInt(1);
432. contentView.writeToParcel(parcel,0);
433. }else{
434. parcel.writeInt(0);
435. }
437. parcel.writeInt(defaults);
438. parcel.writeInt(this.flags);
440. if(sound!=null){
441. parcel.writeInt(1);
442. sound.writeToParcel(parcel,0);
443. }else{
444. parcel.writeInt(0);
445. }
446. parcel.writeInt(audioStreamType);
447. parcel.writeLongArray(vibrate);
448. parcel.writeInt(ledARGB);
449. parcel.writeInt(ledOnMS);
450. parcel.writeInt(ledOffMS);
451. parcel.writeInt(iconLevel);
453. if(fullScreenIntent!=null){
454. parcel.writeInt(1);
455. fullScreenIntent.writeToParcel(parcel,0);
456. }else{
457. parcel.writeInt(0);
458. }
459. }
461. /**
462. *Parcelable.CreatorthatinstantiatesNotificationobjects
463. */
464. publicstaticfinalParcelable.Creator<Notification>CREATOR
465. =newParcelable.Creator<Notification>()
466. {
467. publicNotificationcreateFromParcel(Parcelparcel)
468. {
469. returnnewNotification(parcel);
470. }
472. publicNotification[]newArray(intsize)
473. {
474. returnnewNotification[size];
475. }
476. };
478. /**
479. *Setsthe{@link#contentView}fieldtobeaviewwiththestandard"LatestEvent"
480. *layout.
481. *
482. *<p>Usesthe{@link#icon}and{@link#when}fieldstosettheiconandtimefields
483. *intheview.</p>
484. *@paramcontextThecontextforyourapplication/activity.
485. *@paramcontentTitleThetitlethatgoesintheexpandedentry.
486. *@paramcontentTextThetextthatgoesintheexpandedentry.
487. *@paramcontentIntentTheintenttolaunchwhentheuserclickstheexpandednotification.
488. *Ifthisisanactivity,itmustincludethe
489. *{@linkandroid.content.Intent#FLAG_ACTIVITY_NEW_TASK}flag,whichrequires
490. *thatyoutakecareoftaskmanagementasdescribedin
491. *<ahref="{@docRoot}guide/topics/fundamentals.html#lcycles">ApplicationFundamentals:ActivitiesandTasks</a>.
492. */
493. publicvoidsetLatestEventInfo(Contextcontext,
494. CharSequencecontentTitle,CharSequencecontentText,PendingIntentcontentIntent){
495. RemoteViewscontentView=newRemoteViews(context.getPackageName(),
496. com.android.internal.R.layout.status_bar_latest_event_content);
497. if(this.icon!=0){
498. contentView.setImageViewResource(com.android.internal.R.id.icon,this.icon);
499. }
500. if(contentTitle!=null){
501. contentView.setTextViewText(com.android.internal.R.id.title,contentTitle);
502. }
503. if(contentText!=null){
504. contentView.setTextViewText(com.android.internal.R.id.text,contentText);
505. }
506. if(this.when!=0){
507. contentView.setLong(com.android.internal.R.id.time,"setTime",when);
508. }
510. this.contentView=contentView;
511. this.contentIntent=contentIntent;
512. }
514. @Override
515. publicStringtoString(){
516. StringBuildersb=newStringBuilder();
517. sb.append("Notification(vibrate=");
518. if(this.vibrate!=null){
519. intN=this.vibrate.length-1;
520. sb.append("[");
521. for(inti=0;i<N;i++){
522. sb.append(this.vibrate[i]);
523. sb.append(',');
524. }
525. if(N!=-1){
526. sb.append(this.vibrate[N]);
527. }
528. sb.append("]");
529. }elseif((this.defaults&DEFAULT_VIBRATE)!=0){
530. sb.append("default");
531. }else{
532. sb.append("null");
533. }
534. sb.append(",sound=");
535. if(this.sound!=null){
536. sb.append(this.sound.toString());
537. }elseif((this.defaults&DEFAULT_SOUND)!=0){
538. sb.append("default");
539. }else{
540. sb.append("null");
541. }
542. sb.append(",defaults=0x");
543. sb.append(Integer.toHexString(this.defaults));
544. sb.append(",flags=0x");
545. sb.append(Integer.toHexString(this.flags));
546. sb.append(")");
547. returnsb.toString();
548. }
549. }

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.app; import java.util.Date; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.media.AudioManager; import android.net.Uri; import android.os.Parcel; import android.os.Parcelable; import android.text.TextUtils; import android.text.format.DateFormat; import android.text.format.DateUtils; import android.widget.RemoteViews; /** * A class that represents how a persistent notification is to be presented to * the user using the {@link android.app.NotificationManager}. * * <p>For a guide to creating notifications, see the * <a href="{@docRoot}guide/topics/ui/notifiers/notifications.html">Creating Status * Bar Notifications</a> document in the Dev Guide.</p> */ public class Notification implements Parcelable { /** * Use all default values (where applicable). */ public static final int DEFAULT_ALL = ~0; /** * Use the default notification sound. This will ignore any given * {@link #sound}. * * @see #defaults */ public static final int DEFAULT_SOUND = 1; /** * Use the default notification vibrate. This will ignore any given * {@link #vibrate}. Using phone vibration requires the * {@link android.Manifest.permission#VIBRATE VIBRATE} permission. * * @see #defaults */ public static final int DEFAULT_VIBRATE = 2; /** * Use the default notification lights. This will ignore the * {@link #FLAG_SHOW_LIGHTS} bit, and {@link #ledARGB}, {@link #ledOffMS}, or * {@link #ledOnMS}. * * @see #defaults */ public static final int DEFAULT_LIGHTS = 4; /** * The timestamp for the notification. The icons and expanded views * are sorted by this key. */ public long when; /** * The resource id of a drawable to use as the icon in the status bar. */ public int icon; /** * The number of events that this notification represents. For example, in a new mail * notification, this could be the number of unread messages. This number is superimposed over * the icon in the status bar. If the number is 0 or negative, it is not shown in the status * bar. */ public int number; /** * The intent to execute when the expanded status entry is clicked. If * this is an activity, it must include the * {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires * that you take care of task management as described in the <em>Activities and Tasks</em> * section of the <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application * Fundamentals</a> document. */ public PendingIntent contentIntent; /** * The intent to execute when the status entry is deleted by the user * with the "Clear All Notifications" button. This probably shouldn't * be launching an activity since several of those will be sent at the * same time. */ public PendingIntent deleteIntent; /** * An intent to launch instead of posting the notification to the status bar. * Only for use with extremely high-priority notifications demanding the user's * <strong>immediate</strong> attention, such as an incoming phone call or * alarm clock that the user has explicitly set to a particular time. * If this facility is used for something else, please give the user an option * to turn it off and use a normal notification, as this can be extremely * disruptive. */ public PendingIntent fullScreenIntent; /** * Text to scroll across the screen when this item is added to * the status bar. */ public CharSequence tickerText; /** * The view that will represent this notification in the expanded status bar. */ public RemoteViews contentView; /** * If the icon in the status bar is to have more than one level, you can set this. Otherwise, * leave it at its default value of 0. * * @see android.widget.ImageView#setImageLevel * @see android.graphics.drawable#setLevel */ public int iconLevel; /** * The sound to play. * * <p> * To play the default notification sound, see {@link #defaults}. * </p> */ public Uri sound; /** * Use this constant as the value for audioStreamType to request that * the default stream type for notifications be used. Currently the * default stream type is STREAM_RING. */ public static final int STREAM_DEFAULT = -1; /** * The audio stream type to use when playing the sound. * Should be one of the STREAM_ constants from * {@link android.media.AudioManager}. */ public int audioStreamType = STREAM_DEFAULT; /** * The pattern with which to vibrate. * * <p> * To vibrate the default pattern, see {@link #defaults}. * </p> * * @see android.os.Vibrator#vibrate(long[],int) */ public long[] vibrate; /** * The color of the led. The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledARGB; /** * The number of milliseconds for the LED to be on while it's flashing. * The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledOnMS; /** * The number of milliseconds for the LED to be off while it's flashing. * The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledOffMS; /** * Specifies which values should be taken from the defaults. * <p> * To set, OR the desired from {@link #DEFAULT_SOUND}, * {@link #DEFAULT_VIBRATE}, {@link #DEFAULT_LIGHTS}. For all default * values, use {@link #DEFAULT_ALL}. * </p> */ public int defaults; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if you want the LED on for this notification. * <ul> * <li>To turn the LED off, pass 0 in the alpha channel for colorARGB * or 0 for both ledOnMS and ledOffMS.</li> * <li>To turn the LED on, pass 1 for ledOnMS and 0 for ledOffMS.</li> * <li>To flash the LED, pass the number of milliseconds that it should * be on and off to ledOnMS and ledOffMS.</li> * </ul> * <p> * Since hardware varies, you are not guaranteed that any of the values * you pass are honored exactly. Use the system defaults (TODO) if possible * because they will be set to values that work on any given hardware. * <p> * The alpha channel must be set for forward compatibility. * */ public static final int FLAG_SHOW_LIGHTS = 0x00000001; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if this notification is in reference to something that is ongoing, * like a phone call. It should not be set if this notification is in * reference to something that happened at a particular point in time, * like a missed phone call. */ public static final int FLAG_ONGOING_EVENT = 0x00000002; /** * Bit to be bitwise-ored into the {@link #flags} field that if set, * the audio will be repeated until the notification is * cancelled or the notification window is opened. */ public static final int FLAG_INSISTENT = 0x00000004; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if you want the sound and/or vibration play each time the * notification is sent, even if it has not been canceled before that. */ public static final int FLAG_ONLY_ALERT_ONCE = 0x00000008; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if the notification should be canceled when it is clicked by the * user. */ public static final int FLAG_AUTO_CANCEL = 0x00000010; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if the notification should not be canceled when the user clicks * the Clear all button. */ public static final int FLAG_NO_CLEAR = 0x00000020; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if this notification represents a currently running service. This * will normally be set for you by {@link Service#startForeground}. */ public static final int FLAG_FOREGROUND_SERVICE = 0x00000040; public int flags; /** * Constructs a Notification object with everything set to 0. */ public Notification() { this.when = System.currentTimeMillis(); } /** * @deprecated use {@link #Notification(int,CharSequence,long)} and {@link #setLatestEventInfo}. * @hide */ public Notification(Context context, int icon, CharSequence tickerText, long when, CharSequence contentTitle, CharSequence contentText, Intent contentIntent) { this.when = when; this.icon = icon; this.tickerText = tickerText; setLatestEventInfo(context, contentTitle, contentText, PendingIntent.getActivity(context, 0, contentIntent, 0)); } /** * Constructs a Notification object with the information needed to * have a status bar icon without the standard expanded view. * * @param icon The resource id of the icon to put in the status bar. * @param tickerText The text that flows by in the status bar when the notification first * activates. * @param when The time to show in the time field. In the System.currentTimeMillis * timebase. */ public Notification(int icon, CharSequence tickerText, long when) { this.icon = icon; this.tickerText = tickerText; this.when = when; } /** * Unflatten the notification from a parcel. */ public Notification(Parcel parcel) { int version = parcel.readInt(); when = parcel.readLong(); icon = parcel.readInt(); number = parcel.readInt(); if (parcel.readInt() != 0) { contentIntent = PendingIntent.CREATOR.createFromParcel(parcel); } if (parcel.readInt() != 0) { deleteIntent = PendingIntent.CREATOR.createFromParcel(parcel); } if (parcel.readInt() != 0) { tickerText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); } if (parcel.readInt() != 0) { contentView = RemoteViews.CREATOR.createFromParcel(parcel); } defaults = parcel.readInt(); flags = parcel.readInt(); if (parcel.readInt() != 0) { sound = Uri.CREATOR.createFromParcel(parcel); } audioStreamType = parcel.readInt(); vibrate = parcel.createLongArray(); ledARGB = parcel.readInt(); ledOnMS = parcel.readInt(); ledOffMS = parcel.readInt(); iconLevel = parcel.readInt(); if (parcel.readInt() != 0) { fullScreenIntent = PendingIntent.CREATOR.createFromParcel(parcel); } } public Notification clone() { Notification that = new Notification(); that.when = this.when; that.icon = this.icon; that.number = this.number; // PendingIntents are global, so there's no reason (or way) to clone them. that.contentIntent = this.contentIntent; that.deleteIntent = this.deleteIntent; that.fullScreenIntent = this.fullScreenIntent; if (this.tickerText != null) { that.tickerText = this.tickerText.toString(); } if (this.contentView != null) { that.contentView = this.contentView.clone(); } that.iconLevel = that.iconLevel; that.sound = this.sound; // android.net.Uri is immutable that.audioStreamType = this.audioStreamType; final long[] vibrate = this.vibrate; if (vibrate != null) { final int N = vibrate.length; final long[] vib = that.vibrate = new long[N]; System.arraycopy(vibrate, 0, vib, 0, N); } that.ledARGB = this.ledARGB; that.ledOnMS = this.ledOnMS; that.ledOffMS = this.ledOffMS; that.defaults = this.defaults; that.flags = this.flags; return that; } public int describeContents() { return 0; } /** * Flatten this notification from a parcel. */ public void writeToParcel(Parcel parcel, int flags) { parcel.writeInt(1); parcel.writeLong(when); parcel.writeInt(icon); parcel.writeInt(number); if (contentIntent != null) { parcel.writeInt(1); contentIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } if (deleteIntent != null) { parcel.writeInt(1); deleteIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } if (tickerText != null) { parcel.writeInt(1); TextUtils.writeToParcel(tickerText, parcel, flags); } else { parcel.writeInt(0); } if (contentView != null) { parcel.writeInt(1); contentView.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } parcel.writeInt(defaults); parcel.writeInt(this.flags); if (sound != null) { parcel.writeInt(1); sound.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } parcel.writeInt(audioStreamType); parcel.writeLongArray(vibrate); parcel.writeInt(ledARGB); parcel.writeInt(ledOnMS); parcel.writeInt(ledOffMS); parcel.writeInt(iconLevel); if (fullScreenIntent != null) { parcel.writeInt(1); fullScreenIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } } /** * Parcelable.Creator that instantiates Notification objects */ public static final Parcelable.Creator<Notification> CREATOR = new Parcelable.Creator<Notification>() { public Notification createFromParcel(Parcel parcel) { return new Notification(parcel); } public Notification[] newArray(int size) { return new Notification[size]; } }; /** * Sets the {@link #contentView} field to be a view with the standard "Latest Event" * layout. * * <p>Uses the {@link #icon} and {@link #when} fields to set the icon and time fields * in the view.</p> * @param context The context for your application / activity. * @param contentTitle The title that goes in the expanded entry. * @param contentText The text that goes in the expanded entry. * @param contentIntent The intent to launch when the user clicks the expanded notification. * If this is an activity, it must include the * {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires * that you take care of task management as described in * <a href="{@docRoot}guide/topics/fundamentals.html#lcycles">Application Fundamentals: Activities and Tasks</a>. */ public void setLatestEventInfo(Context context, CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) { RemoteViews contentView = new RemoteViews(context.getPackageName(), com.android.internal.R.layout.status_bar_latest_event_content); if (this.icon != 0) { contentView.setImageViewResource(com.android.internal.R.id.icon, this.icon); } if (contentTitle != null) { contentView.setTextViewText(com.android.internal.R.id.title, contentTitle); } if (contentText != null) { contentView.setTextViewText(com.android.internal.R.id.text, contentText); } if (this.when != 0) { contentView.setLong(com.android.internal.R.id.time, "setTime", when); } this.contentView = contentView; this.contentIntent = contentIntent; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("Notification(vibrate="); if (this.vibrate != null) { int N = this.vibrate.length-1; sb.append("["); for (int i=0; i<N; i++) { sb.append(this.vibrate[i]); sb.append(','); } if (N != -1) { sb.append(this.vibrate[N]); } sb.append("]"); } else if ((this.defaults & DEFAULT_VIBRATE) != 0) { sb.append("default"); } else { sb.append("null"); } sb.append(",sound="); if (this.sound != null) { sb.append(this.sound.toString()); } else if ((this.defaults & DEFAULT_SOUND) != 0) { sb.append("default"); } else { sb.append("null"); } sb.append(",defaults=0x"); sb.append(Integer.toHexString(this.defaults)); sb.append(",flags=0x"); sb.append(Integer.toHexString(this.flags)); sb.append(")"); return sb.toString(); } }

在344行，sound = Uri.CREATOR.createFromParcel(parcel);回来经过打log发现，问题的关键不再这个类中。

再次，改变方向，换条思路走，找notification的服务类，看有什么新的发现，在framework/base/services/java/com/android/server/NotificationManagerService.java类中，真的找到了我需要的，

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.server; import com.android.internal.statusbar.StatusBarNotification; import com.android.server.StatusBarManagerService; import android.app.ActivityManagerNative; import android.app.IActivityManager; import android.app.INotificationManager; import android.app.ITransientNotification; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.StatusBarManager; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.content.res.Resources; import android.database.ContentObserver; import android.hardware.usb.UsbManager; import android.media.AudioManager; import android.net.Uri; import android.os.BatteryManager; import android.os.Bundle; import android.os.Binder; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Power; import android.os.Process; import android.os.RemoteException; import android.os.SystemProperties; import android.os.Vibrator; import android.os.SystemClock; import android.provider.Settings; import android.telephony.TelephonyManager; import android.text.TextUtils; import android.util.EventLog; import android.util.Slog; import android.util.Log; import android.view.accessibility.AccessibilityEvent; import android.view.accessibility.AccessibilityManager; import android.widget.Toast; import java.io.FileDescriptor; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; /** {@hide} */ public class NotificationManagerService extends INotificationManager.Stub { private static final String TAG = "NotificationService"; private static final boolean DBG = false; private static final int MAX_PACKAGE_NOTIFICATIONS = 50; private static final int NOTIFICATION_REQUEST_INTERVAL = 30000; // 30 seconds private static final int MAX_PACKAGE_NOTIFICATION_REQUESTS = 500; // message codes private static final int MESSAGE_TIMEOUT = 2; private static final int LONG_DELAY = 3500; // 3.5 seconds private static final int SHORT_DELAY = 2000; // 2 seconds private static final long[] DEFAULT_VIBRATE_PATTERN = {0, 250, 250, 250}; private static final int DEFAULT_STREAM_TYPE = AudioManager.STREAM_NOTIFICATION; final Context mContext; final IActivityManager mAm; final IBinder mForegroundToken = new Binder(); private WorkerHandler mHandler; private StatusBarManagerService mStatusBar; private LightsService mLightsService; private LightsService.Light mBatteryLight; private LightsService.Light mNotificationLight; private LightsService.Light mAttentionLight; private int mDefaultNotificationColor; private int mDefaultNotificationLedOn; private int mDefaultNotificationLedOff; private NotificationRecord mSoundNotification; private NotificationPlayer mSound; private boolean mSystemReady; private int mDisabledNotifications; private NotificationRecord mVibrateNotification; private Vibrator mVibrator = new Vibrator(); // for enabling and disabling notification pulse behavior private boolean mScreenOn = true; private boolean mInCall = false; private boolean mNotificationPulseEnabled; // This is true if we have received a new notification while the screen is off // (that is, if mLedNotification was set while the screen was off) // This is reset to false when the screen is turned on. private boolean mPendingPulseNotification; // for adb connected notifications private boolean mAdbNotificationShown = false; private Notification mAdbNotification; private final ArrayList<NotificationRecord> mNotificationList = new ArrayList<NotificationRecord>(); private class PackageRequestInfo { int requestCount; long lastPostTime; } private final HashMap<String, PackageRequestInfo> mPackageInfo = new HashMap<String, PackageRequestInfo>(); private ArrayList<ToastRecord> mToastQueue; private ArrayList<NotificationRecord> mLights = new ArrayList<NotificationRecord>(); private boolean mBatteryCharging; private boolean mBatteryLow; private boolean mBatteryFull; private NotificationRecord mLedNotification; private static final int BATTERY_LOW_ARGB = 0xFFFF0000; // Charging Low - red solid on private static final int BATTERY_MEDIUM_ARGB = 0xFFFFFF00; // Charging - orange solid on private static final int BATTERY_FULL_ARGB = 0xFF00FF00; // Charging Full - green solid on private static final int BATTERY_BLINK_ON = 125; private static final int BATTERY_BLINK_OFF = 2875; private static String idDebugString(Context baseContext, String packageName, int id) { Context c = null; if (packageName != null) { try { c = baseContext.createPackageContext(packageName, 0); } catch (NameNotFoundException e) { c = baseContext; } } else { c = baseContext; } String pkg; String type; String name; Resources r = c.getResources(); try { return r.getResourceName(id); } catch (Resources.NotFoundException e) { return "<name unknown>"; } } private static final class NotificationRecord { final String pkg; final String tag; final int id; final int uid; final int initialPid; ITransientNotification callback; int duration; final Notification notification; IBinder statusBarKey; NotificationRecord(String pkg, String tag, int id, int uid, int initialPid, Notification notification) { this.pkg = pkg; this.tag = tag; this.id = id; this.uid = uid; this.initialPid = initialPid; this.notification = notification; } void dump(PrintWriter pw, String prefix, Context baseContext) { pw.println(prefix + this); pw.println(prefix + " icon=0x" + Integer.toHexString(notification.icon) + " / " + idDebugString(baseContext, this.pkg, notification.icon)); pw.println(prefix + " contentIntent=" + notification.contentIntent); pw.println(prefix + " deleteIntent=" + notification.deleteIntent); pw.println(prefix + " tickerText=" + notification.tickerText); pw.println(prefix + " contentView=" + notification.contentView); pw.println(prefix + " defaults=0x" + Integer.toHexString(notification.defaults)); pw.println(prefix + " flags=0x" + Integer.toHexString(notification.flags)); pw.println(prefix + " sound=" + notification.sound); pw.println(prefix + " vibrate=" + Arrays.toString(notification.vibrate)); pw.println(prefix + " ledARGB=0x" + Integer.toHexString(notification.ledARGB) + " ledOnMS=" + notification.ledOnMS + " ledOffMS=" + notification.ledOffMS); } @Override public final String toString() { return "NotificationRecord{" + Integer.toHexString(System.identityHashCode(this)) + " pkg=" + pkg + " id=" + Integer.toHexString(id) + " tag=" + tag + "}"; } } private static final class ToastRecord { final int pid; final String pkg; final ITransientNotification callback; int duration; ToastRecord(int pid, String pkg, ITransientNotification callback, int duration) { this.pid = pid; this.pkg = pkg; this.callback = callback; this.duration = duration; } void update(int duration) { this.duration = duration; } void dump(PrintWriter pw, String prefix) { pw.println(prefix + this); } @Override public final String toString() { return "ToastRecord{" + Integer.toHexString(System.identityHashCode(this)) + " pkg=" + pkg + " callback=" + callback + " duration=" + duration; } } private StatusBarManagerService.NotificationCallbacks mNotificationCallbacks = new StatusBarManagerService.NotificationCallbacks() { public void onSetDisabled(int status) { synchronized (mNotificationList) { mDisabledNotifications = status; if ((mDisabledNotifications & StatusBarManager.DISABLE_NOTIFICATION_ALERTS) != 0) { // cancel whatever's going on long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } } } } public void onClearAll() { cancelAll(); } public void onNotificationClick(String pkg, String tag, int id) { cancelNotification(pkg, tag, id, Notification.FLAG_AUTO_CANCEL, Notification.FLAG_FOREGROUND_SERVICE); } public void onPanelRevealed() { synchronized (mNotificationList) { // sound mSoundNotification = null; long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } // vibrate mVibrateNotification = null; identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } // light mLights.clear(); mLedNotification = null; updateLightsLocked(); } } public void onNotificationError(String pkg, String tag, int id, int uid, int initialPid, String message) { Slog.d(TAG, "onNotification error pkg=" + pkg + " tag=" + tag + " id=" + id + "; will crashApplication(uid=" + uid + ", pid=" + initialPid + ")"); cancelNotification(pkg, tag, id, 0, 0); long ident = Binder.clearCallingIdentity(); try { ActivityManagerNative.getDefault().crashApplication(uid, initialPid, pkg, "Bad notification posted from package " + pkg + ": " + message); } catch (RemoteException e) { } Binder.restoreCallingIdentity(ident); } }; private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); boolean queryRestart = false; if (action.equals(Intent.ACTION_BATTERY_CHANGED)) { boolean batteryCharging = (intent.getIntExtra("plugged", 0) != 0); int level = intent.getIntExtra("level", -1); boolean batteryLow = (level >= 0 && level <= Power.LOW_BATTERY_THRESHOLD); int status = intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN); boolean batteryFull = (status == BatteryManager.BATTERY_STATUS_FULL || level >= 90); if (batteryCharging != mBatteryCharging || batteryLow != mBatteryLow || batteryFull != mBatteryFull) { mBatteryCharging = batteryCharging; mBatteryLow = batteryLow; mBatteryFull = batteryFull; updateLights(); } } else if (action.equals(UsbManager.ACTION_USB_STATE)) { Bundle extras = intent.getExtras(); boolean usbConnected = extras.getBoolean(UsbManager.USB_CONNECTED); boolean adbEnabled = (UsbManager.USB_FUNCTION_ENABLED.equals( extras.getString(UsbManager.USB_FUNCTION_ADB))); updateAdbNotification(usbConnected && adbEnabled); } else if (action.equals(Intent.ACTION_PACKAGE_REMOVED) || action.equals(Intent.ACTION_PACKAGE_RESTARTED) || (queryRestart=action.equals(Intent.ACTION_QUERY_PACKAGE_RESTART)) || action.equals(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE)) { String pkgList[] = null; if (action.equals(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE)) { pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST); } else if (queryRestart) { pkgList = intent.getStringArrayExtra(Intent.EXTRA_PACKAGES); } else { Uri uri = intent.getData(); if (uri == null) { return; } String pkgName = uri.getSchemeSpecificPart(); if (pkgName == null) { return; } pkgList = new String[]{pkgName}; } if (pkgList != null && (pkgList.length > 0)) { for (String pkgName : pkgList) { cancelAllNotificationsInt(pkgName, 0, 0, !queryRestart); } } } else if (action.equals(Intent.ACTION_SCREEN_ON)) { mScreenOn = true; updateNotificationPulse(); } else if (action.equals(Intent.ACTION_SCREEN_OFF)) { mScreenOn = false; updateNotificationPulse(); } else if (action.equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) { mInCall = (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_OFFHOOK)); updateNotificationPulse(); } } }; class SettingsObserver extends ContentObserver { SettingsObserver(Handler handler) { super(handler); } void observe() { ContentResolver resolver = mContext.getContentResolver(); resolver.registerContentObserver(Settings.System.getUriFor( Settings.System.NOTIFICATION_LIGHT_PULSE), false, this); update(); } @Override public void onChange(boolean selfChange) { update(); } public void update() { ContentResolver resolver = mContext.getContentResolver(); boolean pulseEnabled = Settings.System.getInt(resolver, Settings.System.NOTIFICATION_LIGHT_PULSE, 0) != 0; if (mNotificationPulseEnabled != pulseEnabled) { mNotificationPulseEnabled = pulseEnabled; updateNotificationPulse(); } } } NotificationManagerService(Context context, StatusBarManagerService statusBar, LightsService lights) { super(); mContext = context; mLightsService = lights; mAm = ActivityManagerNative.getDefault(); mSound = new NotificationPlayer(TAG); mSound.setUsesWakeLock(context); mToastQueue = new ArrayList<ToastRecord>(); mHandler = new WorkerHandler(); mStatusBar = statusBar; statusBar.setNotificationCallbacks(mNotificationCallbacks); mBatteryLight = lights.getLight(LightsService.LIGHT_ID_BATTERY); mNotificationLight = lights.getLight(LightsService.LIGHT_ID_NOTIFICATIONS); mAttentionLight = lights.getLight(LightsService.LIGHT_ID_ATTENTION); Resources resources = mContext.getResources(); mDefaultNotificationColor = resources.getColor( com.android.internal.R.color.config_defaultNotificationColor); mDefaultNotificationLedOn = resources.getInteger( com.android.internal.R.integer.config_defaultNotificationLedOn); mDefaultNotificationLedOff = resources.getInteger( com.android.internal.R.integer.config_defaultNotificationLedOff); // Don't start allowing notifications until the setup wizard has run once. // After that, including subsequent boots, init with notifications turned on. // This works on the first boot because the setup wizard will toggle this // flag at least once and we'll go back to 0 after that. if (0 == Settings.Secure.getInt(mContext.getContentResolver(), Settings.Secure.DEVICE_PROVISIONED, 0)) { mDisabledNotifications = StatusBarManager.DISABLE_NOTIFICATION_ALERTS; } // register for battery changed notifications IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_BATTERY_CHANGED); filter.addAction(UsbManager.ACTION_USB_STATE); filter.addAction(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); filter.addAction(TelephonyManager.ACTION_PHONE_STATE_CHANGED); mContext.registerReceiver(mIntentReceiver, filter); IntentFilter pkgFilter = new IntentFilter(); pkgFilter.addAction(Intent.ACTION_PACKAGE_REMOVED); pkgFilter.addAction(Intent.ACTION_PACKAGE_RESTARTED); pkgFilter.addAction(Intent.ACTION_QUERY_PACKAGE_RESTART); pkgFilter.addDataScheme("package"); mContext.registerReceiver(mIntentReceiver, pkgFilter); IntentFilter sdFilter = new IntentFilter(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); mContext.registerReceiver(mIntentReceiver, sdFilter); SettingsObserver observer = new SettingsObserver(mHandler); observer.observe(); } void systemReady() { // no beeping until we're basically done booting mSystemReady = true; } // Toasts // ============================================================================ public void enqueueToast(String pkg, ITransientNotification callback, int duration) { if (DBG) Slog.i(TAG, "enqueueToast pkg=" + pkg + " callback=" + callback + " duration=" + duration); if (pkg == null || callback == null) { Slog.e(TAG, "Not doing toast. pkg=" + pkg + " callback=" + callback); return ; } synchronized (mToastQueue) { int callingPid = Binder.getCallingPid(); long callingId = Binder.clearCallingIdentity(); try { ToastRecord record; int index = indexOfToastLocked(pkg, callback); // If it's already in the queue, we update it in place, we don't // move it to the end of the queue. if (index >= 0) { record = mToastQueue.get(index); record.update(duration); } else { // Limit the number of toasts that any given package except the android // package can enqueue. Prevents DOS attacks and deals with leaks. if (!"android".equals(pkg)) { int count = 0; final int N = mToastQueue.size(); for (int i=0; i<N; i++) { final ToastRecord r = mToastQueue.get(i); if (r.pkg.equals(pkg)) { count++; if (count >= MAX_PACKAGE_NOTIFICATIONS) { Slog.e(TAG, "Package has already posted " + count + " toasts. Not showing more. Package=" + pkg); return; } } } } record = new ToastRecord(callingPid, pkg, callback, duration); mToastQueue.add(record); index = mToastQueue.size() - 1; keepProcessAliveLocked(callingPid); } // If it's at index 0, it's the current toast. It doesn't matter if it's // new or just been updated. Call back and tell it to show itself. // If the callback fails, this will remove it from the list, so don't // assume that it's valid after this. if (index == 0) { showNextToastLocked(); } } finally { Binder.restoreCallingIdentity(callingId); } } } public void cancelToast(String pkg, ITransientNotification callback) { Slog.i(TAG, "cancelToast pkg=" + pkg + " callback=" + callback); if (pkg == null || callback == null) { Slog.e(TAG, "Not cancelling notification. pkg=" + pkg + " callback=" + callback); return ; } synchronized (mToastQueue) { long callingId = Binder.clearCallingIdentity(); try { int index = indexOfToastLocked(pkg, callback); if (index >= 0) { cancelToastLocked(index); } else { Slog.w(TAG, "Toast already cancelled. pkg=" + pkg + " callback=" + callback); } } finally { Binder.restoreCallingIdentity(callingId); } } } private void showNextToastLocked() { ToastRecord record = mToastQueue.get(0); while (record != null) { if (DBG) Slog.d(TAG, "Show pkg=" + record.pkg + " callback=" + record.callback); try { record.callback.show(); scheduleTimeoutLocked(record, false); return; } catch (RemoteException e) { Slog.w(TAG, "Object died trying to show notification " + record.callback + " in package " + record.pkg); // remove it from the list and let the process die int index = mToastQueue.indexOf(record); if (index >= 0) { mToastQueue.remove(index); } keepProcessAliveLocked(record.pid); if (mToastQueue.size() > 0) { record = mToastQueue.get(0); } else { record = null; } } } } private void cancelToastLocked(int index) { ToastRecord record = mToastQueue.get(index); try { record.callback.hide(); } catch (RemoteException e) { Slog.w(TAG, "Object died trying to hide notification " + record.callback + " in package " + record.pkg); // don't worry about this, we're about to remove it from // the list anyway } mToastQueue.remove(index); keepProcessAliveLocked(record.pid); if (mToastQueue.size() > 0) { // Show the next one. If the callback fails, this will remove // it from the list, so don't assume that the list hasn't changed // after this point. showNextToastLocked(); } } private void scheduleTimeoutLocked(ToastRecord r, boolean immediate) { Message m = Message.obtain(mHandler, MESSAGE_TIMEOUT, r); long delay = immediate ? 0 : (r.duration == Toast.LENGTH_LONG ? LONG_DELAY : SHORT_DELAY); mHandler.removeCallbacksAndMessages(r); mHandler.sendMessageDelayed(m, delay); } private void handleTimeout(ToastRecord record) { if (DBG) Slog.d(TAG, "Timeout pkg=" + record.pkg + " callback=" + record.callback); synchronized (mToastQueue) { int index = indexOfToastLocked(record.pkg, record.callback); if (index >= 0) { cancelToastLocked(index); } } } // lock on mToastQueue private int indexOfToastLocked(String pkg, ITransientNotification callback) { IBinder cbak = callback.asBinder(); ArrayList<ToastRecord> list = mToastQueue; int len = list.size(); for (int i=0; i<len; i++) { ToastRecord r = list.get(i); if (r.pkg.equals(pkg) && r.callback.asBinder() == cbak) { return i; } } return -1; } // lock on mToastQueue private void keepProcessAliveLocked(int pid) { int toastCount = 0; // toasts from this pid ArrayList<ToastRecord> list = mToastQueue; int N = list.size(); for (int i=0; i<N; i++) { ToastRecord r = list.get(i); if (r.pid == pid) { toastCount++; } } try { mAm.setProcessForeground(mForegroundToken, pid, toastCount > 0); } catch (RemoteException e) { // Shouldn't happen. } } private final class WorkerHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_TIMEOUT: handleTimeout((ToastRecord)msg.obj); break; } } } // Notifications // ============================================================================ public void enqueueNotification(String pkg, int id, Notification notification, int[] idOut) { enqueueNotificationWithTag(pkg, null /* tag */, id, notification, idOut); } public void enqueueNotificationWithTag(String pkg, String tag, int id, Notification notification, int[] idOut) { enqueueNotificationInternal(pkg, Binder.getCallingUid(), Binder.getCallingPid(), tag, id, notification, idOut); } // Not exposed via Binder; for system use only (otherwise malicious apps could spoof the // uid/pid of another application) public void enqueueNotificationInternal(String pkg, int callingUid, int callingPid, String tag, int id, Notification notification, int[] idOut) { checkIncomingCall(pkg); // Limit the number of notifications that any given package except the android // package can enqueue. Prevents DOS attacks and deals with leaks. if (!"android".equals(pkg)) { synchronized (mNotificationList) { int count = 0; final int N = mNotificationList.size(); for (int i=0; i<N; i++) { final NotificationRecord r = mNotificationList.get(i); if (r.pkg.equals(pkg)) { count++; if (count >= MAX_PACKAGE_NOTIFICATIONS) { Slog.e(TAG, "Package has already posted " + count + " notifications. Not showing more. package=" + pkg); return; } } } } } // Limit the number of notification requests, notify and cancel that // a package can post. The MAX_PACKAGE_NOTIFICATIONS doesn't work for // packages which notify and quickly cancel it and do this in an // iteration if (!"android".equals(pkg)) { synchronized (mPackageInfo) { if (!mPackageInfo.containsKey(pkg)) { final PackageRequestInfo pInfo = new PackageRequestInfo(); pInfo.requestCount = 1; pInfo.lastPostTime = SystemClock.elapsedRealtime(); mPackageInfo.put(pkg,pInfo); } else { final PackageRequestInfo pInfo = mPackageInfo.get(pkg); final long currentTime = SystemClock.elapsedRealtime(); if ((currentTime - pInfo.lastPostTime) <= NOTIFICATION_REQUEST_INTERVAL) { // Keep track of requests posted within last 30 seconds pInfo.requestCount++; } else { pInfo.requestCount = 1; pInfo.lastPostTime = SystemClock.elapsedRealtime(); } if (pInfo.requestCount >= MAX_PACKAGE_NOTIFICATION_REQUESTS) { // 500 requests within a span of 30 seconds is high if (pInfo.requestCount%MAX_PACKAGE_NOTIFICATION_REQUESTS == 0) { Slog.e(TAG, "Package has already posted too many notifications. " + "Not showing more. package=" + pkg); } return; } } } } // This conditional is a dirty hack to limit the logging done on // behalf of the download manager without affecting other apps. if (!pkg.equals("com.android.providers.downloads") || Log.isLoggable("DownloadManager", Log.VERBOSE)) { EventLog.writeEvent(EventLogTags.NOTIFICATION_ENQUEUE, pkg, id, notification.toString()); } if (pkg == null || notification == null) { throw new IllegalArgumentException("null not allowed: pkg=" + pkg + " id=" + id + " notification=" + notification); } if (notification.icon != 0) { if (notification.contentView == null) { throw new IllegalArgumentException("contentView required: pkg=" + pkg + " id=" + id + " notification=" + notification); } if (notification.contentIntent == null) { throw new IllegalArgumentException("contentIntent required: pkg=" + pkg + " id=" + id + " notification=" + notification); } } synchronized (mNotificationList) { NotificationRecord r = new NotificationRecord(pkg, tag, id, callingUid, callingPid, notification); NotificationRecord old = null; int index = indexOfNotificationLocked(pkg, tag, id); if (index < 0) { mNotificationList.add(r); } else { old = mNotificationList.remove(index); mNotificationList.add(index, r); // Make sure we don't lose the foreground service state. if (old != null) { notification.flags |= old.notification.flags&Notification.FLAG_FOREGROUND_SERVICE; } } // Ensure if this is a foreground service that the proper additional // flags are set. if ((notification.flags&Notification.FLAG_FOREGROUND_SERVICE) != 0) { notification.flags |= Notification.FLAG_ONGOING_EVENT | Notification.FLAG_NO_CLEAR; } if (notification.icon != 0) { StatusBarNotification n = new StatusBarNotification(pkg, id, tag, r.uid, r.initialPid, notification); if (old != null && old.statusBarKey != null) { r.statusBarKey = old.statusBarKey; long identity = Binder.clearCallingIdentity(); try { mStatusBar.updateNotification(r.statusBarKey, n); } finally { Binder.restoreCallingIdentity(identity); } } else { long identity = Binder.clearCallingIdentity(); try { r.statusBarKey = mStatusBar.addNotification(n); mAttentionLight.pulse(); } finally { Binder.restoreCallingIdentity(identity); } } sendAccessibilityEvent(notification, pkg); } else { if (old != null && old.statusBarKey != null) { long identity = Binder.clearCallingIdentity(); try { mStatusBar.removeNotification(old.statusBarKey); } finally { Binder.restoreCallingIdentity(identity); } } } // If we're not supposed to beep, vibrate, etc. then don't. if (((mDisabledNotifications & StatusBarManager.DISABLE_NOTIFICATION_ALERTS) == 0) && (!(old != null && (notification.flags & Notification.FLAG_ONLY_ALERT_ONCE) != 0 )) && mSystemReady) { final AudioManager audioManager = (AudioManager) mContext .getSystemService(Context.AUDIO_SERVICE); // sound final boolean useDefaultSound = (notification.defaults & Notification.DEFAULT_SOUND) != 0; if (useDefaultSound || notification.sound != null) { Uri uri; if (useDefaultSound) { uri = Settings.System.DEFAULT_NOTIFICATION_URI; } else { uri = notification.sound; } boolean looping = (notification.flags & Notification.FLAG_INSISTENT) != 0; int audioStreamType; if (notification.audioStreamType >= 0) { audioStreamType = notification.audioStreamType; } else { audioStreamType = DEFAULT_STREAM_TYPE; } mSoundNotification = r; // do not play notifications if stream volume is 0 // (typically because ringer mode is silent). if (audioManager.getStreamVolume(audioStreamType) != 0) { long identity = Binder.clearCallingIdentity(); try { mSound.play(mContext, uri, looping, audioStreamType); } finally { Binder.restoreCallingIdentity(identity); } } } // vibrate final boolean useDefaultVibrate = (notification.defaults & Notification.DEFAULT_VIBRATE) != 0; if ((useDefaultVibrate || notification.vibrate != null) && audioManager.shouldVibrate(AudioManager.VIBRATE_TYPE_NOTIFICATION)) { mVibrateNotification = r; mVibrator.vibrate(useDefaultVibrate ? DEFAULT_VIBRATE_PATTERN : notification.vibrate, ((notification.flags & Notification.FLAG_INSISTENT) != 0) ? 0: -1); } } // this option doesn't shut off the lights // light // the most recent thing gets the light mLights.remove(old); if (mLedNotification == old) { mLedNotification = null; } //Slog.i(TAG, "notification.lights=" // + ((old.notification.lights.flags & Notification.FLAG_SHOW_LIGHTS) != 0)); if ((notification.flags & Notification.FLAG_SHOW_LIGHTS) != 0) { mLights.add(r); updateLightsLocked(); } else { if (old != null && ((old.notification.flags & Notification.FLAG_SHOW_LIGHTS) != 0)) { updateLightsLocked(); } } } idOut[0] = id; } private void sendAccessibilityEvent(Notification notification, CharSequence packageName) { AccessibilityManager manager = AccessibilityManager.getInstance(mContext); if (!manager.isEnabled()) { return; } AccessibilityEvent event = AccessibilityEvent.obtain(AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED); event.setPackageName(packageName); event.setClassName(Notification.class.getName()); event.setParcelableData(notification); CharSequence tickerText = notification.tickerText; if (!TextUtils.isEmpty(tickerText)) { event.getText().add(tickerText); } manager.sendAccessibilityEvent(event); } private void cancelNotificationLocked(NotificationRecord r) { // status bar if (r.notification.icon != 0) { long identity = Binder.clearCallingIdentity(); try { mStatusBar.removeNotification(r.statusBarKey); } finally { Binder.restoreCallingIdentity(identity); } r.statusBarKey = null; } // sound if (mSoundNotification == r) { mSoundNotification = null; long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } } // vibrate if (mVibrateNotification == r) { mVibrateNotification = null; long identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } } // light mLights.remove(r); if (mLedNotification == r) { mLedNotification = null; } } /** * Cancels a notification ONLY if it has all of the {@code mustHaveFlags} * and none of the {@code mustNotHaveFlags}. */ private void cancelNotification(String pkg, String tag, int id, int mustHaveFlags, int mustNotHaveFlags) { EventLog.writeEvent(EventLogTags.NOTIFICATION_CANCEL, pkg, id, mustHaveFlags); synchronized (mNotificationList) { int index = indexOfNotificationLocked(pkg, tag, id); if (index >= 0) { NotificationRecord r = mNotificationList.get(index); if ((r.notification.flags & mustHaveFlags) != mustHaveFlags) { return; } if ((r.notification.flags & mustNotHaveFlags) != 0) { return; } mNotificationList.remove(index); cancelNotificationLocked(r); updateLightsLocked(); } } } /** * Cancels all notifications from a given package that have all of the * {@code mustHaveFlags}. */ boolean cancelAllNotificationsInt(String pkg, int mustHaveFlags, int mustNotHaveFlags, boolean doit) { EventLog.writeEvent(EventLogTags.NOTIFICATION_CANCEL_ALL, pkg, mustHaveFlags); synchronized (mNotificationList) { final int N = mNotificationList.size(); boolean canceledSomething = false; for (int i = N-1; i >= 0; --i) { NotificationRecord r = mNotificationList.get(i); if ((r.notification.flags & mustHaveFlags) != mustHaveFlags) { continue; } if ((r.notification.flags & mustNotHaveFlags) != 0) { continue; } if (!r.pkg.equals(pkg)) { continue; } canceledSomething = true; if (!doit) { return true; } mNotificationList.remove(i); cancelNotificationLocked(r); } if (canceledSomething) { updateLightsLocked(); } return canceledSomething; } } public void cancelNotification(String pkg, int id) { cancelNotificationWithTag(pkg, null /* tag */, id); } public void cancelNotificationWithTag(String pkg, String tag, int id) { checkIncomingCall(pkg); // Limit the number of notification requests, notify and cancel that // a package can post. The MAX_PACKAGE_NOTIFICATIONS doesn't work for // packages which notify and quickly cancel it and do this in an // iteration synchronized (mPackageInfo) { if (!"android".equals(pkg) && mPackageInfo.containsKey(pkg)) { final PackageRequestInfo pInfo = mPackageInfo.get(pkg); final long currentTime = SystemClock.elapsedRealtime(); if ((currentTime - pInfo.lastPostTime) <= NOTIFICATION_REQUEST_INTERVAL) { // Keep track of requests posted within last 30 seconds pInfo.requestCount++; } else { pInfo.requestCount = 1; pInfo.lastPostTime = SystemClock.elapsedRealtime(); } } } // Don't allow client applications to cancel foreground service notis. cancelNotification(pkg, tag, id, 0, Binder.getCallingUid() == Process.SYSTEM_UID ? 0 : Notification.FLAG_FOREGROUND_SERVICE); } public void cancelAllNotifications(String pkg) { checkIncomingCall(pkg); // Calling from user space, don't allow the canceling of actively // running foreground services. cancelAllNotificationsInt(pkg, 0, Notification.FLAG_FOREGROUND_SERVICE, true); } void checkIncomingCall(String pkg) { int uid = Binder.getCallingUid(); if (uid == Process.SYSTEM_UID || uid == 0) { return; } try { ApplicationInfo ai = mContext.getPackageManager().getApplicationInfo( pkg, 0); if (ai.uid != uid) { throw new SecurityException("Calling uid " + uid + " gave package" + pkg + " which is owned by uid " + ai.uid); } } catch (PackageManager.NameNotFoundException e) { throw new SecurityException("Unknown package " + pkg); } } void cancelAll() { synchronized (mNotificationList) { final int N = mNotificationList.size(); for (int i=N-1; i>=0; i--) { NotificationRecord r = mNotificationList.get(i); if ((r.notification.flags & (Notification.FLAG_ONGOING_EVENT | Notification.FLAG_NO_CLEAR)) == 0) { if (r.notification.deleteIntent != null) { try { r.notification.deleteIntent.send(); } catch (PendingIntent.CanceledException ex) { // do nothing - there's no relevant way to recover, and // no reason to let this propagate Slog.w(TAG, "canceled PendingIntent for " + r.pkg, ex); } } mNotificationList.remove(i); cancelNotificationLocked(r); } } updateLightsLocked(); } } private void updateLights() { synchronized (mNotificationList) { updateLightsLocked(); } } // lock on mNotificationList private void updateLightsLocked() { // Battery low always shows, other states only show if charging. if (mBatteryLow) { if (mBatteryCharging) { mBatteryLight.setColor(BATTERY_LOW_ARGB); } else { // Flash when battery is low and not charging mBatteryLight.setFlashing(BATTERY_LOW_ARGB, LightsService.LIGHT_FLASH_TIMED, BATTERY_BLINK_ON, BATTERY_BLINK_OFF); } } else if (mBatteryCharging) { if (mBatteryFull) { mBatteryLight.setColor(BATTERY_FULL_ARGB); } else { mBatteryLight.setColor(BATTERY_MEDIUM_ARGB); } } else { mBatteryLight.turnOff(); } // clear pending pulse notification if screen is on if (mScreenOn || mLedNotification == null) { mPendingPulseNotification = false; } // handle notification lights if (mLedNotification == null) { // get next notification, if any int n = mLights.size(); if (n > 0) { mLedNotification = mLights.get(n-1); } if (mLedNotification != null && !mScreenOn) { mPendingPulseNotification = true; } } // we only flash if screen is off and persistent pulsing is enabled // and we are not currently in a call if (!mPendingPulseNotification || mScreenOn || mInCall) { mNotificationLight.turnOff(); } else { int ledARGB = mLedNotification.notification.ledARGB; int ledOnMS = mLedNotification.notification.ledOnMS; int ledOffMS = mLedNotification.notification.ledOffMS; if ((mLedNotification.notification.defaults & Notification.DEFAULT_LIGHTS) != 0) { ledARGB = mDefaultNotificationColor; ledOnMS = mDefaultNotificationLedOn; ledOffMS = mDefaultNotificationLedOff; } if (mNotificationPulseEnabled) { // pulse repeatedly mNotificationLight.setFlashing(ledARGB, LightsService.LIGHT_FLASH_TIMED, ledOnMS, ledOffMS); } else { // pulse only once mNotificationLight.pulse(ledARGB, ledOnMS); } } } // lock on mNotificationList private int indexOfNotificationLocked(String pkg, String tag, int id) { ArrayList<NotificationRecord> list = mNotificationList; final int len = list.size(); for (int i=0; i<len; i++) { NotificationRecord r = list.get(i); if (tag == null) { if (r.tag != null) { continue; } } else { if (!tag.equals(r.tag)) { continue; } } if (r.id == id && r.pkg.equals(pkg)) { return i; } } return -1; } // This is here instead of StatusBarPolicy because it is an important // security feature that we don't want people customizing the platform // to accidentally lose. private void updateAdbNotification(boolean adbEnabled) { if (adbEnabled) { if ("0".equals(SystemProperties.get("persist.adb.notify"))) { return; } if (!mAdbNotificationShown) { NotificationManager notificationManager = (NotificationManager) mContext .getSystemService(Context.NOTIFICATION_SERVICE); if (notificationManager != null) { Resources r = mContext.getResources(); CharSequence title = r.getText( com.android.internal.R.string.adb_active_notification_title); CharSequence message = r.getText( com.android.internal.R.string.adb_active_notification_message); if (mAdbNotification == null) { mAdbNotification = new Notification(); mAdbNotification.icon = com.android.internal.R.drawable.stat_sys_adb; mAdbNotification.when = 0; mAdbNotification.flags = Notification.FLAG_ONGOING_EVENT; mAdbNotification.tickerText = title; mAdbNotification.defaults = 0; // please be quiet mAdbNotification.sound = null; mAdbNotification.vibrate = null; } Intent intent = new Intent( Settings.ACTION_APPLICATION_DEVELOPMENT_SETTINGS); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); // Note: we are hard-coding the component because this is // an important security UI that we don't want anyone // intercepting. intent.setComponent(new ComponentName("com.android.settings", "com.android.settings.DevelopmentSettings")); PendingIntent pi = PendingIntent.getActivity(mContext, 0, intent, 0); mAdbNotification.setLatestEventInfo(mContext, title, message, pi); mAdbNotificationShown = true; notificationManager.notify( com.android.internal.R.string.adb_active_notification_title, mAdbNotification); } } } else if (mAdbNotificationShown) { NotificationManager notificationManager = (NotificationManager) mContext .getSystemService(Context.NOTIFICATION_SERVICE); if (notificationManager != null) { mAdbNotificationShown = false; notificationManager.cancel( com.android.internal.R.string.adb_active_notification_title); } } } private void updateNotificationPulse() { synchronized (mNotificationList) { updateLightsLocked(); } } // ====================================================================== @Override protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { pw.println("Permission Denial: can't dump NotificationManager from from pid=" + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()); return; } pw.println("Current Notification Manager state:"); int N; synchronized (mToastQueue) { N = mToastQueue.size(); if (N > 0) { pw.println(" Toast Queue:"); for (int i=0; i<N; i++) { mToastQueue.get(i).dump(pw, " "); } pw.println(" "); } } synchronized (mNotificationList) { N = mNotificationList.size(); if (N > 0) { pw.println(" Notification List:"); for (int i=0; i<N; i++) { mNotificationList.get(i).dump(pw, " ", mContext); } pw.println(" "); } N = mLights.size(); if (N > 0) { pw.println(" Lights List:"); for (int i=0; i<N; i++) { mLights.get(i).dump(pw, " ", mContext); } pw.println(" "); } pw.println(" mSoundNotification=" + mSoundNotification); pw.println(" mSound=" + mSound); pw.println(" mVibrateNotification=" + mVibrateNotification); pw.println(" mDisabledNotifications=0x" + Integer.toHexString(mDisabledNotifications)); pw.println(" mSystemReady=" + mSystemReady); } } }

在871行有这句代码：uri = notification.sound;在886行有这句代码：mSound.play(mContext, uri, looping, audioStreamType);当时我就有点兴奋了，感觉这就是问题的关键，然后打log，发现这就是问题的关键，当notification正常发声音的时候，这个886行的代码走进来了，不发声音的时候这个代码没有走进来，所以我离问题的根源又进了一步。最后发现是包着这段代码的if语句中的判断引起的，所以我把if语句中的代码都打印出来，发现是mDisabledNotifications这个变量引起的，我就追踪这个mDisabledNotifications变量值的变化的地方。发现在467行有这段代码：

// Don't start allowing notifications until the setup wizard has run once. // After that, including subsequent boots, init with notifications turned on. // This works on the first boot because the setup wizard will toggle this // flag at least once and we'll go back to 0 after that. if (0 == Settings.Secure.getInt(mContext.getContentResolver(), Settings.Secure.DEVICE_PROVISIONED, 0)) { mDisabledNotifications = StatusBarManager.DISABLE_NOTIFICATION_ALERTS; }

研究以上的注释，发现原来google故意这么设置的，至于google为什么要这么设置，我没有深究，暂时没有想明白，但是这个这个初始化的时候必须要tsetup wizard （设置向导）运行一次，所以导致了值不对，所以这个notification就不响了。

在264行有这段代码对mDisabledNotification进行改变的：

private StatusBarManagerService.NotificationCallbacks mNotificationCallbacks = new StatusBarManagerService.NotificationCallbacks() { public void onSetDisabled(int status) { synchronized (mNotificationList) { mDisabledNotifications = status; if ((mDisabledNotifications & StatusBarManager.DISABLE_NOTIFICATION_ALERTS) != 0) { // cancel whatever's going on long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } } } }

找到问题的根源了，太兴奋了，这个问题断断续续困扰了我3周，终于经过我3天地认真分析，把问题的根源找到了，要想解决就很简单了，可以在初始化的时候直接赋值为0就ok了！

最后、886行mSound.play(mContext, uri, looping, audioStreamType);是NotificationPlayer类中的一个方法，在play（）方法中有一个线程， mThread = new CmdThread(); mThread.start();线程中的run方法中有：case PLAY：startSound(cmd);在startSound（）方法中又有一个线程： mCompletionThread = new CreationAndCompletionThread(cmd);

mCompletionThread = new CreationAndCompletionThread(cmd); synchronized(mCompletionThread) { mCompletionThread.start(); mCompletionThread.wait(); }

在这个线程类中的run方法中：在这个线程中进行播放音乐的，真正的发声音也是通过Mediapaly来实现的：

<span style="font-size:13px;"> public void run() { Looper.prepare(); mLooper = Looper.myLooper(); synchronized(this) { AudioManager audioManager = (AudioManager) mCmd.context.getSystemService(Context.AUDIO_SERVICE); try { MediaPlayer player = new MediaPlayer(); player.setAudioStreamType(mCmd.stream); player.setDataSource(mCmd.context, mCmd.uri); player.setLooping(mCmd.looping); player.prepare(); if ((mCmd.uri != null) && (mCmd.uri.getEncodedPath() != null) && (mCmd.uri.getEncodedPath().length() > 0)) { if (mCmd.looping) { audioManager.requestAudioFocus(null, mCmd.stream, AudioManager.AUDIOFOCUS_GAIN); } else { audioManager.requestAudioFocus(null, mCmd.stream, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK); } } player.setOnCompletionListener(NotificationPlayer.this); player.start(); if (mPlayer != null) { mPlayer.release(); } mPlayer = player; } catch (Exception e) { Log.w(mTag, "error loading sound for " + mCmd.uri, e); } mAudioManager = audioManager; this.notify(); } Looper.loop(); }</span>

希望给读者留下点启发，转载请标明出处：http://blog.csdn.net/wdaming1986/article/details/7081787

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