Run a GCM function before uninstalling app

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Run a GCM function before uninstalling app

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#1 by (4 votes)

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I have an Android application that is using GCM, I wanted to know how the unRegistered method works, how can I do it, so that when the user uninstalls the application it automatically quits my GCM and also like to take it out of my database the id of it, which I think is more complex.

android

asked by anonymous 23.07.2014 / 22:40

1 answer

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There is no Intent / Receiver or "callback" that your application can notify of its own uninstallation.

There is Broadcast of ACTION_PACKAGE_REMOVED 1 , which is triggered for all receivers that are registered for this Intent , but your application is not notified 2 if they are being uninstalled.

GCM has a form of detection, and is based on the NotRegistered status of the response of a message sending to the GCM server.

This is the only indication that the application has been uninstalled and is no longer available to receive messages. The steps are as follows 3 :

The user uninstalls your application.
Your server tries to send a message to the GCM server, targeting your application that has been uninstalled on a particular device.
GCM sends the message to the device.
The GCM Client on the device receives the message, queries PackageManager checking to see if it has a BroadcastReceiver configured to accept this message, returning false to the application that has been uninstalled.
The GCM Client notifies the GCM server that the application has been uninstalled. And the GCM server marks that registration_id for deletion.
Your server tries to send a new message to the same application / device.
GCM Server will respond to your server with a NotRegistered error for this message.
Your server removes registration_id from the bank.

This is the only way GCM can detect uninstallation.

Take a look at the HTTP response status type, specifically in the failure field and in the error field of each registration_id (which failed), it comes with the NotRegistered value, which GCM you can submit according to documentation .

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