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@hachi-eiji
Created June 18, 2012 15:40
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How to check this application is installed
1) access this URL
https://graph.facebook.com/<user_id>?fields=installed&access_token=<accessToken>
2) return this json format. if "installed" is true then this application is installed.
{
"installed": true,
"id": "<user_id>",
"type": "user"
}
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