android 9.0 systemui之通知的处理流程

frameworks的通知如何传递到Systemui？

frameworks

NotificationManager.java

  notify()--->notifyAsUser()-->service.enqueueNotificationWithTag(); 即(NotificationManagerService.enqueueNotificationWithTag)

NotificationManagerService.java

  enqueueNotificationWithTag()-->enqueueNotificationInternal()-->

  mHandler.post(new EnqueueNotificationRunnable(userId, r));-->

  mHandler.postDelayed(new PostNotificationRunnable(r.getKey()),
                             DELAY_FOR_ASSISTANT_TIME);-->

PostNotificationRunnable.run()-->mListeners.notifyPostedLocked(); 这里的mListeners是NotificationListeners ，是一个在NotificationManagerService中的内部类

NotificationListeners.notifyPostedLocked--notifyPosted()-->

listener.onNotificationPosted(sbnHolder, rankingUpdate);这里的mListeners是INotificationListener这个aidl，

protected class NotificationListenerWrapper extends INotificationListener.Stub 

NotificationListenerWrapper  是 NotificationListenerService 的内部类

public abstract class NotificationListenerService extends Service

SystemUI：

public class NotificationListenerWithPlugins extends NotificationListenerService implements PluginListener
public class NotificationListener extends NotificationListenerWithPlugins

SystemUI\src\com\android\systemui\statusbar\NotificationListener.java

所以listener.onNotificationPosted最终调用的是SystemUI中NotificationListener.java的onNotificationPosted方法。

 

SystemUI 通知流程：

 

StatusBarNotification.java

Notification.java

NotificationData.java     The list of currently displaying notifications

NotificationData.Entry

通知栏图标类 StatusBarIconView

 

1，NotificationListener.java ---》onNotificationPosted-->mEntryManager.addNotification()

      当一个通知到来的时候，首先触发NotificationListener中的onNotificationPosted，然后继续调用NotificationEntryManager.addNotification()

2，NotificationEntryManager.addNotification(sbn, rankingMap)---》addNotificationInternal()

  NotificationEntryManager.java  
   
 mNotificationData.updateRanking(ranking);//重启排序
        NotificationData.Entry shadeEntry = createNotificationViews(notification);//创建通知entry




    protected NotificationData.Entry createNotificationViews(StatusBarNotification sbn)
            throws InflationException {
        if (CHATTY) {
            Log.d(TAG, "NotificationEntryManager.java createNotificationViews(notification=" + sbn);
        }
		Log.d("lgy_debug_systemui", "createNotificationViews(notification=" + sbn);
        NotificationData.Entry entry = new NotificationData.Entry(sbn);
        Dependency.get(LeakDetector.class).trackInstance(entry);
        entry.createIcons(mContext, sbn);//创建图标
        // Construct the expanded view.
        inflateViews(entry, mListContainer.getViewParentForNotification(entry));
        return entry;
    }

inflateViews--》RowInflaterTask().inflate(）

            new RowInflaterTask().inflate(mContext, parent, entry,
                    row -> {
                        bindRow(entry, pmUser, sbn, row);
                        updateNotification(entry, pmUser, sbn, row);
                    });‘’

 

   RowInflaterTask.java

 public void inflate(Context context, ViewGroup parent, NotificationData.Entry entry,
            RowInflationFinishedListener listener) {
        if (TRACE_ORIGIN) {
            mInflateOrigin = new Throwable("inflate requested here");
        }
        mListener = listener;
        AsyncLayoutInflater inflater = new AsyncLayoutInflater(context);
        mEntry = entry;
        entry.setInflationTask(this);
        inflater.inflate(R.layout.status_bar_notification_row, parent, this);
    }

    private void bindRow(NotificationData.Entry entry, PackageManager pmUser,
            StatusBarNotification sbn, ExpandableNotificationRow row) {
		Log.d("lgy_debug_systemui","NotificationEntryManager.java bindRow  1111");			
        row.setExpansionLogger(this, entry.notification.getKey());
        row.setGroupManager(mGroupManager);
        row.setHeadsUpManager(mHeadsUpManager);
        row.setOnExpandClickListener(mPresenter);
        row.setInflationCallback(this);//给row绑定InflationCallback mCallback，会调用onAsyncInflationFinished方法
        row.setLongPressListener(getNotificationLongClicker());//长按事件
        mListContainer.bindRow(row);//下拉通知绑定视图view ExpandableNotificationRow
        mRemoteInputManager.bindRow(row);

        // Get the app name.
        // Note that Notification.Builder#bindHeaderAppName has similar logic
        // but since this field is used in the guts, it must be accurate.
        // Therefore we will only show the application label, or, failing that, the
        // package name. No substitutions.
        final String pkg = sbn.getPackageName();
        String appname = pkg;
        try {
            final ApplicationInfo info = pmUser.getApplicationInfo(pkg,
                    PackageManager.MATCH_UNINSTALLED_PACKAGES
                            | PackageManager.MATCH_DISABLED_COMPONENTS);
            if (info != null) {
                appname = String.valueOf(pmUser.getApplicationLabel(info));
            }
        } catch (PackageManager.NameNotFoundException e) {
            // Do nothing
        }
        row.setAppName(appname);
        row.setOnDismissRunnable(() ->
                performRemoveNotification(row.getStatusBarNotification()));
        row.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
        if (ENABLE_REMOTE_INPUT) {
            row.setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
        }

        row.setAppOpsOnClickListener(mOnAppOpsClickListener);

        mCallback.onBindRow(entry, pmUser, sbn, row);
    }

    protected void updateNotification(NotificationData.Entry entry, PackageManager pmUser,
            StatusBarNotification sbn, ExpandableNotificationRow row) {
		Log.d("lgy_debug_systemui","NotificationEntryManager.java updateNotification ");		
        row.setNeedsRedaction(mLockscreenUserManager.needsRedaction(entry));
        boolean isLowPriority = mNotificationData.isAmbient(sbn.getKey());
        boolean isUpdate = mNotificationData.get(entry.key) != null;
        boolean wasLowPriority = row.isLowPriority();
        row.setIsLowPriority(isLowPriority);
        row.setLowPriorityStateUpdated(isUpdate && (wasLowPriority != isLowPriority));
        // bind the click event to the content area
        mNotificationClicker.register(row, sbn);//lgy

        // Extract target SDK version.
        try {
            ApplicationInfo info = pmUser.getApplicationInfo(sbn.getPackageName(), 0);
            entry.targetSdk = info.targetSdkVersion;
        } catch (PackageManager.NameNotFoundException ex) {
            Log.e(TAG, "Failed looking up ApplicationInfo for " + sbn.getPackageName(), ex);
        }
        row.setLegacy(entry.targetSdk >= Build.VERSION_CODES.GINGERBREAD
                && entry.targetSdk < Build.VERSION_CODES.LOLLIPOP);
        entry.setIconTag(R.id.icon_is_pre_L, entry.targetSdk < Build.VERSION_CODES.LOLLIPOP);
        entry.autoRedacted = entry.notification.getNotification().publicVersion == null;

        entry.row = row;
        entry.row.setOnActivatedListener(mPresenter);

        boolean useIncreasedCollapsedHeight = mMessagingUtil.isImportantMessaging(sbn,
                mNotificationData.getImportance(sbn.getKey()));
        boolean useIncreasedHeadsUp = useIncreasedCollapsedHeight
                && !mPresenter.isPresenterFullyCollapsed();
        row.setUseIncreasedCollapsedHeight(useIncreasedCollapsedHeight);
        row.setUseIncreasedHeadsUpHeight(useIncreasedHeadsUp);
        row.updateNotification(entry);// ExpandableNotificationRow
    }

 

    public void updateNotification(NotificationData.Entry entry) {
    		Log.d("lgy_debug_systemui"," ExpandableNotificationRow.java  updateNotification");
        mEntry = entry;
        mStatusBarNotification = entry.notification;
        mNotificationInflater.inflateNotificationViews();

        cacheIsSystemNotification();
    }

status_bar_notification_row

   NotificationEntryManager.java

 @Override
    public void onAsyncInflationFinished(NotificationData.Entry entry) {
        mPendingNotifications.remove(entry.key);
        // If there was an async task started after the removal, we don't want to add it back to
        // the list, otherwise we might get leaks.
        boolean isNew = mNotificationData.get(entry.key) == null;
        if (CHATTY) {
            Log.d(TAG, "onAsyncInflationFinished, isNew: " + isNew + ", removed: "
                    + entry.row.isRemoved() + ", key: "
                    + (entry != null ? entry.key : null));
        }
        if (isNew && !entry.row.isRemoved()) {
            addEntry(entry);
        } else if (!isNew && entry.row.hasLowPriorityStateUpdated()) {
            mVisualStabilityManager.onLowPriorityUpdated(entry);
            mPresenter.updateNotificationViews();//lgy systembar->updateNotificationViews
        }
        entry.row.setLowPriorityStateUpdated(false);
    }

StatusBar.java

 

  public void updateNotificationViews() {
		Log.d("lgy_debug_systemui","StatusBar.java-->updateNotificationViews");
        // The function updateRowStates depends on both of these being non-null, so check them here.
        // We may be called before they are set from DeviceProvisionedController's callback.
        if (mStackScroller == null || mScrimController == null) return;

        // Do not modify the notifications during collapse.
        if (isCollapsing()) {
            addPostCollapseAction(this::updateNotificationViews);
            return;
        }

        mViewHierarchyManager.updateNotificationViews();

        updateSpeedBumpIndex();
        updateFooter();
        updateEmptyShadeView();

        updateQsExpansionEnabled();

        // Let's also update the icons
        mNotificationIconAreaController.updateNotificationIcons();
    }

更新图标，布局为notification_icon_area.xml

NotificationIconAreaController  updateNotificationIcons

NotificationIconAreaController  updateStatusBarIcons

 NotificationIconAreaController  updateIconsForLayout