While building Android apps you might sometimes need to expose functionality which other processes can use. As these calls are between separate processes, they cannot be a simple function, as on Android process cannot access the data in another.
To pass data between processes, it needs to be marshaled and unmarshaled accordingly. This marshaling and unmarshmaling of data to primitive types is so the OS can understand it passing over IPC can be tedious and error prone if done manually. Android interface definition language (AIDL) helps solve this problem. AIDL generally has three components which are:
Continue reading %AIDL for Sharing Functionality between Android Apps%
by Abbas Suterwala via SitePoint
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