Inside the Android AccountManager
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The Android AccountManager uses the Binder IPC mechanism to facilitate communication between the AccountManager client and AccountManagerService. When an application requests an account operation through the AccountManager, it results in asynchronous Binder calls to the AccountManagerService, with responses returned via callback interfaces. Authenticators are also contacted asynchronously via Binder calls when additional authentication is needed.
Inside the Android AccountManager
- 5. Account Manager Account Manager Service Authenticator Integrated App HTC Account Zoe, Backup, … system_server
- 6. Application Process Account Manager Account Manager Service Authenticator Integrated App HTC Account Zoe, Backup, … system_server
- 7. Application Process Account Manager Account Manager Service Authenticator Integrated App HTC Account Zoe, Backup, … Method Invocation system_server
- 8. Application Process Account Manager Account Manager Service Authenticator Integrated App HTC Account Zoe, Backup, … Binder IPC Method Invocation system_server
- 9. Application Process Account Manager Account Manager Service Authenticator Integrated App HTC Account Zoe, Backup, … Binder IPC Binder IPC Method Invocation system_server
- 10. http://www.nds.rub.de/media/attachments/files/2012/03/binder.pdf Binder Native IPC mechanism on Android. Implemented as kernel driver and the Binder framework.
- 11. http://www.nds.rub.de/media/attachments/files/2012/03/binder.pdf Binder Binder client uses a proxy approach. Native IPC mechanism on Android. Implemented as kernel driver and the Binder framework.
- 12. http://www.nds.rub.de/media/attachments/files/2012/03/binder.pdf Binder The transaction data is called Parcel. Java objects implementing Paracelable interface can be converted to Parcels. Transaction data limit is around 1MB. Native IPC mechanism on Android. Implemented as kernel driver and the Binder framework.
- 13. http://www.nds.rub.de/media/attachments/files/2012/03/binder.pdf Binder Binder server spawns binder threads to handle the incoming requests automatically. Native IPC mechanism on Android. Implemented as kernel driver and the Binder framework.
- 14. Android Interface Definition Language (AIDL) • To make customized Binder interface. • Default supported data types include primitives, String, CharSequence, List, Map. • Non-primitive type parameters require in / out or inout tag. • Custom data types must implement Parcelable, and declare a corresponding AIDL file. http://developer.android.com/guide/components/aidl.html
- 18. predefined in Binder framework generated from AIDL
- 19. frameworks/base/core/java/android/app/ContextImpl.java AccountManager (binder client side) initialization.
- 20. frameworks/base/core/java/android/app/ContextImpl.java AccountManager (binder client side) initialization.
- 21. frameworks/base/core/java/android/accounts/AccountManager.java AccountManager (binder client side) initialization.
- 22. AccountManagerService (binder server side) initialization. frameworks/base/core/java/android/accounts/ AccountManagerService.java
- 23. AccountManagerService (binder server side) initialization. frameworks/base/core/java/android/accounts/ AccountManagerService.java
- 26. Simplified addAccount() Binder IPC Binder IPC
- 29. main thread
- 32. main thread
- 34. main thread bkg thread main thread
- 37. Application Process Account Manager Account Manager Service Authenticator Integrated App Asynchronized Binder IPC call through interface IAccountManager; Response returned through interface IAccountManagerResponse
- 39. AccountManagerService.Session AccountManagerService (binder client side) initialization.
- 41. ServiceConnection always on main thread
- 42. AbstractAccountAuthenticator (binder server side) initialization. frameworks/base/core/java/android/accounts/ AbstractAccountAuthenticator.java
- 43. Callback through IPC frameworks/base/core/java/android/accounts/ IAccountAuthenticatorResponse.aidl
- 45. Application Process Account Manager Account Manager Service Authenticator Integrated App Asynchronized Binder IPC call through interface IAccountAuthenticator; Response returned through interface IAccountAuthenticatorResponse