How to expose API in one Android Application to another

Question

I would like to write an application that would run on the Android device as a service and then with other application(s) I would access to this service with calls. Is there a way to expose public API from an application/service on the Android device? And how to access this API from another application?

Thanks for help

This kind of duplicate of: http://stackoverflow.com/questions/4638939/android-communication-between-two-applications — Gyuri Majercsik, Dec 09 '11 at 08:51

score 3 · Accepted Answer · answered Dec 09 '11 at 08:53

Look into Intents, AIDL (binder) and content providers.

Intents are smal "simple" asyncronius messages, AIDL if for a more RPC type of API, usefull for a more complex/more data API. Content providers are a way to expose data from your App, like a contact list or something.

How to expose API in one Android Application to another

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