-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy path3.Activity的启动-调用关系-时序图.txt
75 lines (65 loc) · 3.34 KB
/
3.Activity的启动-调用关系-时序图.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
@startuml
'请先安装PlantUML plugin查看该uml
'Android - Activity 启动过程 ：https://github.com/jeanboydev/Android-ReadTheFuckingSourceCode/blob/master/article/android/framework/Android-Activity%E5%90%AF%E5%8A%A8%E8%BF%87%E7%A8%8B.md'
'2019-08-13: 说说你对app（或进程）启动流程的理解? ：https://github.com/MicroKibaco/CrazyDailyQuestion/issues/11'
'参考 3分钟看懂Activity启动流程 ：https://www.jianshu.com/p/9ecea420eb52'
'一张图弄清Activity的启动过程 ：https://juejin.im/post/5c7f3471f265da2db5425c4b'
'简述Activity生命周期-调用链 ：http://gityuan.com/2016/03/18/start-activity-cycle/#%E4%B8%89-%E8%B0%83%E7%94%A8%E9%93%BE'
'Android中Activity启动过程探究 ：https://www.cnblogs.com/kross/p/4025075.html'
title __Activity的启动过程-调用关系__
entity "Launcher"
entity Instrumentation
entity AMS
entity ActivityStackSupervisor as ASS
entity PackageManagerService as PKMS
entity ApplicationThread
entity ActivityThread
Launcher [#green]-> Instrumentation: execStartActivity()
Instrumentation [#green]-> AMS: Binder: startActivity()
note left : ActivityManagerNative.getDefault()\n获取到 AMS的代理
AMS -> AMS: startActivityAsUser
note left : UserHandle.getCallingUserId()\n获取到 userId
AMS -> ASS: startActivityMayWait()
ASS -> PKMS: resolveActivity()
PKMS -> PKMS: queryIntentActivities()
PKMS -> PKMS: chooseBestActivity()
note left :当存在多个满足条件的Activity\n则会弹框让用户来选择。
PKMS -> ASS: startActivityLocked()
note left :检查调用者是否有权限来调用指定的 Activity
ASS -> ASS: startActivityUncheckedLocked()
note left :进行对 launchMode 的处理，\n创建 Task 等操作。
activate ASS
ASS -> Launcher: ActivityStack.resumeTopActivityInnerLocked()
note right :通知Launcher进入Paused状态
Launcher --> ASS: 准备就绪，已经进入Paused状态
deactivate ASS
ASS -> ASS: startSpecificActivityLocked()
note left :启动 Activity 所在进程，\n已存在则直接 onResume()
ASS -> ASS: realStartActivityLocked()
activate ASS
ASS -> ApplicationThread: app.thread.scheduleLaunchActivity()
deactivate ASS
ApplicationThread -> ActivityThread: mH.sendMessage(H.LAUNCH_ACTIVITY)
ActivityThread -> ActivityThread: handleLaunchActivity()
activate ActivityThread
ActivityThread -> ActivityThread: performLaunchActivity()
activate ActivityThread
ActivityThread -> Instrumentation: newActivity(classLoader, component.getClassName(), r.intent)
activate Instrumentation
Instrumentation -> Instrumentation: (Activity)clazz.newInstance();
Instrumentation -> Instrumentation: Activity.attach()
note left :1.attachBaseContext\n2.初始化Window\n3.初始化 WMS
Instrumentation --> ActivityThread
deactivate Instrumentation
ActivityThread -> Instrumentation: 中间通过Activity xxx -> callActivityOnCreate()
deactivate ActivityThread
ActivityThread -> ActivityThread: handleResumeActivity()
activate ActivityThread
ActivityThread -> ActivityThread: performResumeActivity()
activate ActivityThread
ActivityThread -> Instrumentation: xxx -> callActivityOnStart()
ActivityThread -> Instrumentation: xxx -> callActivityOnResume()
deactivate ActivityThread
deactivate ActivityThread
deactivate ActivityThread
@enduml