When I am using GCM for push notification , I got an error return as: field "data" must be a JSON array. When user create the new post then notification will be send to all Registered devices. Any one have some idea of how to solve it? Thank you.When I am using GCM for push notification , I g
阅读背景：
GCM推送通知返回错误:字段数据必须是一个json数组。
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