Android 10.0 systemui drop-down notification bar notification layout related source code analysis

1 Introduction

 In the development of Android 10.0 system rom, when customizing the layout of the drop-down notification bar in systemui, it is also very
important to understand the notification layout of the drop-down notification bar of the native systemui system. Next, let’s analyze it The relevant
source code process of the notification layout of the related drop-down notification bar, understanding these is convenient for modifying the layout of the notification bar

 

2. The core class of the system UI pull-down notification bar notification layout related source code analysis

frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
frameworks/base/core/java/android/app/Notification.java

3. The core function analysis and implementation of the system UI drop-down notification bar notification layout related source code analysis

In the notification layout of the relevant drop-down notification bar in the 10.0 system systemui, in the notification layout of the drop-down notification bar, ExpandableNotificationRow.java is mainly responsible for building the layout of the notification, so it is necessary to analyze the notification from
ExpandableNotificationRow.java The layout build process for

3.1 Related source code analysis of ExpandableNotificationRow.java

   @VisibleForTesting
      public NotificationContentInflater getNotificationIn