google cloud messaging - Make android device acting as a gcm servers -

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one instance of application should communicate instance on different device. i'd not have own backend server.

i'd turn android device server in order send message device. i'd use topics.

are there limits (quotas per application) of:

  1. number of such servers @ given point of time
  2. number of topics
  3. number of active client devices connected gcm

the gcm designed have 1 backend server. kind of strange behavior may observe having plenty devices acting server. using same key

there no limit on number of servers (as long send via http) or devices.

however, problem in approach you'll need put project's api key client app easy adversary find out decompiling binary. using api key, able spam users. it's huge security hole.


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