用代码画流程图和时序图快餐教程(4) - mermaid时序图

最新推荐文章于 2025-10-15 10:59:32 发布

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本文介绍了使用Mermaid语法绘制时序图的方法，包括参与者声明、消息传递等基本元素的书写方式，并提供了一个完整的示例，展示从Activity到BroadcastReceiver的广播流程。

mermaid时序图

时序图声明

mermaid支持多种图，所以要先通过sequenceDiagram

sequenceDiagram

participant

mermaid的participant不支持直接声明颜色，只能声明个名字了

sequenceDiagram
participant Activity
participant ContextWrapper

消息要用双箭头

按照PlantUML的习惯写“->”是不行的，这样会没有箭头。如果要往箭头，还需要再加一个”>”，变成”->>”.

sequenceDiagram
    Activity ->> ContextWrapper : registerReceiver()
    ContextWrapper ->> ContextImpl : registerReceiver()

完整例子

sequenceDiagram
    Activity ->> ContextWrapper : registerReceiver()
    ContextWrapper ->> ContextImpl : registerReceiver()
    ContextImpl ->> LoadedApk : getReceiverDispatcher()
    LoadedApk ->> ActivityManagerProxy : registerReceiver()
    ActivityManagerProxy ->> ActivityManagerService : registerReceiver()

    Activity ->> ContextWrapper : sendBroadcast()
    ContextWrapper ->> ContextImpl : sendBroadcast()
    ContextImpl ->> ActivityManagerService: broadcastIntent()
    ActivityManagerService ->> ActivityManagerService : broadcastIntentLocked()
    ActivityManagerService ->> ActivityManagerService : collectReceiverComponents()
    ActivityManagerService ->> ActivityManagerService : scheduleBroadcastsLocked()
    ActivityManagerService ->> ActivityManagerService : processNextBroadcast()
    ActivityManagerService ->> ActivityManagerService : deliverToRegisteredReceiverLocked()
    ActivityManagerService ->> ActivityManagerService : performReceiveLocked()
    ActivityManagerService ->> ApplicationThreadProxy : scheduleRegisteredReceiver()
    ApplicationThreadProxy ->> InnerReceiver : performReceive()
    InnerReceiver ->> ReceiverDispatcher : performReceive()
    ReceiverDispatcher ->> BroadcastReceiver : onReceive()

    Activity ->> ContextWrapper : sendOrderedBroadcast()
    ContextWrapper ->> ContextImpl : sendOrderedBroadcast()
    ContextImpl ->> ActivityManagerService: broadcastIntent()