Android AIDL

android IPC: AIDL thread is not blocked.

Using AIDL is necessary only if you allow clients from different applications to access your service for IPC and want to handle multithreading in your service. If you do not need
to perform concurrent IPC across different applications, you should create your interface by implementing
a Binder or, if you want to perform IPC, but do not need
to handle multithreading, implement your interface using
a Messenger. Regardless, be sure that you understand Bound
Services before implementing an AIDL.

When used, a remote call does not block; it simply sends the transaction data and immediately returns. 

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