I want to write an app where one phone sends a question to another phone and the phone that has the same app installed answers it like yes or no. What is an efficient way to do this?
I have done some research about c2dm and xmpp but have doubts about that they can cover my requirements. Ideas please?
I want to write an app where one phone sends a question to another
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I would go for C2DM in combination with specific Intents to define what the other phone should be doing.
https://developer.android.com/training/sharing/index.html