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I am developing Android app using GCM. Currently I am using standard Google libs on client and server sides. If I am testing on two Android devices GCM works fine when both devices switched on regardless if my app is running or not.
However if Device A is switched off and I am sending messages to it from Device B, when Device A switched back on it doesn't receive any messages been sent while it was off line.
On server side (which initiates an actual send) every message to Device A has no collapse_key, time_to_live is set to 2000000 (just in case for testing purposes). Actual send has retries parameter set to 50 (in case GCM itself is unreachable, however this is unlikely).
Do I need to complete the GCM registration procedure on device boot? Currently I do so.
Please note that GCM broadcast receiver and GCMIntentService were set as well as permissions in manifest as described on Google web site.
Any advice will be much appreciated. I really got stuck with this issue.
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Sorry guys. It was my fault. Shared preferences were not loaded properly, that caused GCMIntentService to operate unproperly. Messages go in fine.
So SOLVED
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