1.设置代码在Settings中，ZenMode开头的一系列文件

/packages/apps/Settings/src/com/android/settings/notification/ZenModeSettings.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeSettingsBase.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeVoiceActivity.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModePrioritySettings.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeRuleSettingsBase.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeEventRuleSettings.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeAutomationSettings.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeScheduleRuleSettings.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeScheduleDaysSelection.java
/packages/apps/Settings/src/com/android/settings/notification/ZenModeVisualInterruptionSettings.java

2.framework中关于勿扰的文件

2.1 勿扰模式设置，可以在进程间传递

/frameworks/base/core/java/android/service/notification/ZenModeConfig.aidl
/frameworks/base/core/java/android/service/notification/ZenModeConfig.java

2.2 勿扰模式使用相关文件

/frameworks/base/services/core/java/com/android/server/notification/ZenModeHelper.java
/frameworks/base/services/core/java/com/android/server/notification/ZenModeFiltering.java
/frameworks/base/services/core/java/com/android/server/notification/ZenModeConditions.java

2.3 systemUI中，有勿扰模式UI和功能两个部分构成。因为最终的目的是处理通知，所以实现是在systemUI中。

/frameworks/base/packages/SystemUI/src/com/android/systemui/volume/ZenModePanel.java
/frameworks/base/packages/SystemUI/src/com/android/systemui/tuner/TunerZenModePanel.java
/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/ZenModeController.java
/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/ZenModeControllerImpl.java

3.各个apk对勿扰模式的处理，以来电铃声为例

/packages/services/Telecomm/src/com/android/server/telecom/Ringer.java

    private boolean shouldRingForContact(Uri contactUri) {final NotificationManager manager =(NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);final Bundle extras = new Bundle();if (contactUri != null) {extras.putStringArray(Notification.EXTRA_PEOPLE, new String[] {contactUri.toString()});}return manager.matchesCallFilter(extras);}

使用matchesCallFilter来决定是否响铃。

4.matchesCallFilter流程分析

frameworks/base/core/java/android/app/NotificationManager.java

    public boolean matchesCallFilter(Bundle extras) {INotificationManager service = getService();try {return service.matchesCallFilter(extras);} catch (RemoteException e) {throw e.rethrowFromSystemServer();}}

frameworks/base/services/core/java/com/android/server/notification/NotificationManagerService.java

        public boolean matchesCallFilter(Bundle extras) {enforceSystemOrSystemUI("INotificationManager.matchesCallFilter");return mZenModeHelper.matchesCallFilter(Binder.getCallingUserHandle(),extras,mRankingHelper.findExtractor(ValidateNotificationPeople.class),MATCHES_CALL_FILTER_CONTACTS_TIMEOUT_MS,MATCHES_CALL_FILTER_TIMEOUT_AFFINITY);}

android/frameworks/base/services/core/java/com/android/server/notification/ZenModeHelper.java

    public boolean matchesCallFilter(UserHandle userHandle, Bundle extras,ValidateNotificationPeople validator, int contactsTimeoutMs, float timeoutAffinity) {synchronized (mConfig) {return ZenModeFiltering.matchesCallFilter(mContext, mZenMode, mConfig, userHandle,extras, validator, contactsTimeoutMs, timeoutAffinity);}}

android/frameworks/base/services/core/java/com/android/server/notification/ZenModeFiltering.java

    public static boolean matchesCallFilter(Context context, int zen, ZenModeConfig config,UserHandle userHandle, Bundle extras, ValidateNotificationPeople validator,int contactsTimeoutMs, float timeoutAffinity) {if (zen == Global.ZEN_MODE_NO_INTERRUPTIONS) return false; // nothing gets through　//勿扰模式判断if (zen == Global.ZEN_MODE_ALARMS) return false; // not an alarmif (zen == Global.ZEN_MODE_IMPORTANT_INTERRUPTIONS) {if (config.allowRepeatCallers && REPEAT_CALLERS.isRepeat(context, extras)) {  //短时间内第二次来电放行return true;}if (!config.allowCalls) return false; // no other calls get through　//是否禁止全部来电if (validator != null) {final float contactAffinity = validator.getContactAffinity(userHandle, extras,contactsTimeoutMs, timeoutAffinity);return audienceMatches(config.allowCallsFrom, contactAffinity);　//依据联系人判断}}return true;}

先来看返回结果调用的方法：

    private static boolean audienceMatches(int source, float contactAffinity) {switch (source) {case ZenModeConfig.SOURCE_ANYONE: //所有人return true;case ZenModeConfig.SOURCE_CONTACT:return contactAffinity >= ValidateNotificationPeople.VALID_CONTACT; //联系人case ZenModeConfig.SOURCE_STAR:return contactAffinity >= ValidateNotificationPeople.STARRED_CONTACT; //星标联系人default:Slog.w(TAG, "Encountered unknown source: " + source);return true;}}

很简单，就是依据配置走不同的分支。接下来继续看核心的getContactAffinity方法
frameworks/base/services/core/java/com/android/server/notification/ValidateNotificationPeople.java

    public float getContactAffinity(UserHandle userHandle, Bundle extras, int timeoutMs,float timeoutAffinity) {...final PeopleRankingReconsideration prr = validatePeople(context, key, extras, affinityOut); //从缓存中读取值float affinity = affinityOut[0];if (prr != null) {// Perform the heavy work on a background thread so we can abort when we hit the// timeout.final Semaphore s = new Semaphore(0);AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() {@Overridepublic void run() {prr.work();　//开线程查询数据库s.release();}});try {if (!s.tryAcquire(timeoutMs, TimeUnit.MILLISECONDS)) {Slog.w(TAG, "Timeout while waiting for affinity: " + key + ". "+ "Returning timeoutAffinity=" + timeoutAffinity);return timeoutAffinity;　//超时后直接返回}} catch (InterruptedException e) {Slog.w(TAG, "InterruptedException while waiting for affinity: " + key + ". "+ "Returning affinity=" + affinity, e);return affinity;　//线程被中断后返回缓存结果}affinity = Math.max(prr.getContactAffinity(), affinity);　//正常情况下返回的结果}return affinity;}

线程工作方法work如下：

        public void work() {long start = SystemClock.elapsedRealtime();if (VERBOSE) Slog.i(TAG, "Executing: validation for: " + mKey);long timeStartMs = System.currentTimeMillis();for (final String handle: mPendingLookups) {LookupResult lookupResult = null;final Uri uri = Uri.parse(handle);if ("tel".equals(uri.getScheme())) {　　　//处理电话号码类型的uriif (DEBUG) Slog.d(TAG, "checking telephone URI: " + handle);lookupResult = resolvePhoneContact(mContext, uri.getSchemeSpecificPart());} else if ("mailto".equals(uri.getScheme())) {　//处理电子邮件类型的uriif (DEBUG) Slog.d(TAG, "checking mailto URI: " + handle);lookupResult = resolveEmailContact(mContext, uri.getSchemeSpecificPart());} else if (handle.startsWith(Contacts.CONTENT_LOOKUP_URI.toString())) { //处理联系人lookup_uriif (DEBUG) Slog.d(TAG, "checking lookup URI: " + handle);lookupResult = searchContacts(mContext, uri);} else {　//非法的uri,生成默认的结果lookupResult = new LookupResult();  // invalid person for the cacheSlog.w(TAG, "unsupported URI " + handle);}if (lookupResult != null) {synchronized (mPeopleCache) {final String cacheKey = getCacheKey(mContext.getUserId(), handle);mPeopleCache.put(cacheKey, lookupResult);　//查询存储到缓存}if (DEBUG) Slog.d(TAG, "lookup contactAffinity is " + lookupResult.getAffinity());mContactAffinity = Math.max(mContactAffinity, lookupResult.getAffinity());　　//保存结果值} else {if (DEBUG) Slog.d(TAG, "lookupResult is null");}}...}

以电话号码分支为例：

    private LookupResult resolvePhoneContact(Context context, final String number) {Uri phoneUri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI,Uri.encode(number));return searchContacts(context, phoneUri);}

    private LookupResult searchContacts(Context context, Uri lookupUri) {LookupResult lookupResult = new LookupResult();Cursor c = null;try {c = context.getContentResolver().query(lookupUri, LOOKUP_PROJECTION, null, null, null);if (c == null) {Slog.w(TAG, "Null cursor from contacts query.");return lookupResult;}while (c.moveToNext()) {lookupResult.mergeContact(c);}} catch (Throwable t) {Slog.w(TAG, "Problem getting content resolver or performing contacts query.", t);} finally {if (c != null) {c.close();}}return lookupResult;}

上述两个方法就是查询联系人数据库，其中生成结果的方法mergeContact如下：

        public void mergeContact(Cursor cursor) {mAffinity = Math.max(mAffinity, VALID_CONTACT);// Contact IDint id;final int idIdx = cursor.getColumnIndex(Contacts._ID);if (idIdx >= 0) {id = cursor.getInt(idIdx);if (DEBUG) Slog.d(TAG, "contact _ID is: " + id);} else {id = -1;Slog.i(TAG, "invalid cursor: no _ID");}// Starredfinal int starIdx = cursor.getColumnIndex(Contacts.STARRED);if (starIdx >= 0) {boolean isStarred = cursor.getInt(starIdx) != 0;if (isStarred) {mAffinity = Math.max(mAffinity, STARRED_CONTACT);}if (DEBUG) Slog.d(TAG, "contact STARRED is: " + isStarred);} else {if (DEBUG) Slog.d(TAG, "invalid cursor: no STARRED");}}

实际上就是给mAffinity赋值，标记为普通联系人或者星标联系人。

如果要加入指定联系人在勿扰模式中优先，从流程分析看只要修改searchContacts方法就可以了。

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勿扰模式代码结构简析

1.设置代码在Settings中，ZenMode开头的一系列文件

2.framework中关于勿扰的文件

3.各个apk对勿扰模式的处理，以来电铃声为例

4.matchesCallFilter流程分析

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