问题
I\'ve been reading many posts regarding a GCM issue that affects some people. It seems that in some devices/routers/carriers the notifications suffer delays. I\'ve experienced this issue with my router: messages came with a lot of delay on WIFI but came instantly when I disabled WIFI and connected to the mobile net.
It seems there is a workaround that can be done from the Android app. Something like increasing the heartbeat that keeps GCM connection alive, or so.
Can anyone tell us what should we do to avoid the delay? How can we keep the connection with GCM from an Android app? A code example (and where and how to use it) would be really helpful.
This post explains the problem. It says that \"we could keep the connection alive with a ping every two minutes from the GCM server (which is free)\". How can we do that?
Thanks a lot
The following apps seem to do the trick. Surprisingly, the first one doesn\'t need any permission, the second one internet connection and the third one is only for rooted phones:
https://play.google.com/store/apps/details?id=at.pansy.droid.gcmWifiFix
https://play.google.com/store/apps/details?id=com.elotro.pushheartbeat
https://play.google.com/store/apps/details?id=com.andqlimax.pushfixer
回答1:
I would put this as a comment in the first answer but I don't have enough reputation.
I had a similar issue and I solved it executing the code below before calling my webservice.
context.sendBroadcast(new Intent("com.google.android.intent.action.GTALK_HEARTBEAT"));
context.sendBroadcast(new Intent("com.google.android.intent.action.MCS_HEARTBEAT"));
Hope it help you!
回答2:
There's no need to send the heartbeat from the GCM server to the phone, you can force android itself to send the heartbeat sooner that it would otherwise do.
I had a look at the Push Notifications Fixer app, which I tested and worked for me, and it seems all you need to do is broadcast the following intents:
com.google.android.intent.action.MCS_HEARTBEAT
com.google.android.intent.action.GTALK_HEARTBEAT
I'm not sure why it's sending both, you can try only one and see if it does the trick. Here's the link to the app (I'm not the developer): https://play.google.com/store/apps/details?id=com.andqlimax.pushfixer.noroot
回答3:
An alternative solution if you have root permissions - You can check and change the GCM heartbeat times manually. The default is 900000 (15 minutes). I set to 240000 (4 minutes) to be safe and avoid 5 minute router timeouts.
Check heartbeat time (shell)
adb shell
su
sqlite3 /data/data/com.google.android.gsf/databases/gservices.db "SELECT * FROM main WHERE name ='gtalk_max_server_heartbeat_time';"
sqlite3 /data/data/com.google.android.gsf/databases/gservices.db "SELECT * FROM main WHERE name LIKE 'gtalk_%heartbeat_ping_interval_ms';"
Change heartbeat time (shell)
sqlite3 /data/data/com.google.android.gsf/databases/gservices.db "UPDATE main SET value = '240000' WHERE name = 'gtalk_max_server_heartbeat_time'
sqlite3 /data/data/com.google.android.gsf/databases/gservices.db "UPDATE main SET value = '240000' WHERE name LIKE 'gtalk_%heartbeat_ping_interval_ms'
Change heartbeat time (Android)
Process proc = Runtime.getRuntime().exec("su");
DataOutputStream os = new DataOutputStream(proc.getOutputStream());
os.writeBytes("sqlite3 /data/data/com.google.android.gsf/databases/gservices.db \"UPDATE main SET value = '240000' WHERE name = 'gtalk_max_server_heartbeat_time'\"\n");
os.writeBytes("sqlite3 /data/data/com.google.android.gsf/databases/gservices.db \"UPDATE main SET value = '240000' WHERE name LIKE 'gtalk_%heartbeat_ping_interval_ms'\"\n");
os.writeBytes("exit\n");
os.writeBytes("exit\n");
os.flush();
os.close();
proc.waitFor();
回答4:
It's not about how you receive the push, it's about how you send it.
You can set the priority of the message to "high" ( From where you send the push, your server )
https://developers.google.com/cloud-messaging/concept-options#setting-the-priority-of-a-message
回答5:
"we could keep the connection alive with a ping every two minutes from the GCM server (which is free)". How can we do that?
You can do that by sending a GCM message from your server to all the devices on which you wish this ping to be performed. You can put some special payload in that message that would be processed silently by the app on the device (and not display any notification). However, such ping will shorten the battery life of the devices that use this app.
来源：https://stackoverflow.com/questions/19560448/how-to-avoid-delay-in-android-gcm-messages-change-heartbeat