Google Cloud Messaging - 检查设备是否已经注册 [英] Google Cloud Messaging - Check if device is already registered

问题描述

我只在我的Android应用中设置GCM。但我有问题，我不知道如何检查设备是否已经注册。我使用新的谷歌播放服务库。

I just set up GCM in my Android App. But I have the problem that I don't know how to check if the device is already registered. I work with the new google play services library.

注册部分如下所示：

The register part looks like this:

@Override
        protected String doInBackground(String... arg0) {
            String msg = "";
            try {
                if (gcm == null) {
                    gcm = GoogleCloudMessaging.getInstance(context_app);
                }
                regid = gcm.register(SENDER_ID);
                msg = "Dvice registered, registration ID=" + regid;
                Log.d("111", msg);
                sendRegistrationIdToBackend(regid);

            } catch (IOException ex) {
                msg = "Error :" + ex.getMessage();
            }
            return msg;
        }

如何修改它以检查设备是否已经注册？ / p>

How can I modify this that it checks if the device is already registered?

推荐答案

当您获得注册ID时，请将其存储在SharedPreferences中，例如：

when you get registration Id, Store it in SharedPreferences, for example:

SharedPreferences shp = context.getSharedPreferences("anyNameYouLike",MODE_PRIVATE);
SharedPreferences.Editor editor=shp.edit();
editor.putString("RegID",registrationID).commit;

在下一次注册之前，请检查anyNameYouLike是否包含名为RegID的字段。像这样：

In the next time before you register check the "anyNameYouLike" if it contain field called RegID Like this:

private boolean isRegistered(Context context){
SharedPreferences shp = context.getSharedPreferences("anyNameYouLike",PRIVATE_MODE);
return shp.contains("RegID");
}

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