问GcmPubSub订阅无效的appInstanceToken：

EN

我最近尝试了Google消息传递服务的新主题API。但是我总是得到错误无效的appInstanceToken:

这是逻辑猫

java.lang.IllegalArgumentException:无效appInstanceToken: 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err: at com.google.android.gms.gcm.GcmPubSub.subscribe(Unknown Source) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err: at com.SimDetail.MainActivity$3.doInBackground(MainActivity.java:265) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err：com.SimDetail.MainActivity$3.doInBackground(MainActivity.java:255) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err: android.os.AsyncTask$2.call(AsyncTask.java:292) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err: java.util.concurrent.FutureTask.run(FutureTask.java:237) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err：android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err: java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 11-10 22:28:34.674 15742-15983/com.SimDetail W/System.err: java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 11-10 22:28:34.674 15742-15983/com.SimDetail W/java.lang.Thread.run(Thread.java:818)：System.err

有人能告诉我我做错了什么吗？谢谢。