1. What is binder?
- Intuitively, Binder is a class in Android that inherits the IBinder interface
- From the perspective of IPC (inter-process communication, interprocess communication), Binder is a cross-process communication in Android, and Binder can be understood as a virtual physical device whose device drivers are/dev/binder, This mode of communication is not in Linux
- From the Android framework perspective, Binder is a bridge for ServiceManager to connect various manager (Activitymanager, windowmanager,etc) and corresponding ManagerService
- From the Android application layer, Binder is the medium of communication between the client and the server, and when you bindservice, the server returns a Binder object containing the service-side business call, through which the binder object Clients can access services or data provided by the server, including General Service and AIDL based services
2.
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An analysis of Android binder mechanism
