gcm返回服务不可用

Question

我有这个代码。我从Google控制台输入项目密钥作为snederId并收到错误： 服务不可用。

您建议我在设置注册码时仔细检查哪些步骤？

private void registerInBackground() {
        new AsyncTask<Void, Void, String>() {
            @Override
            protected String doInBackground(Void... params) {
                String msg = "";
                try {
                    if (gcm == null) {
                        gcm = GoogleCloudMessaging.getInstance(context);
                    }
                    regId = gcm.register(SENDER_ID);
                    msg = "Device registered, registration ID=" + regId;

                    // You should send the registration ID to your server over
                    // HTTP, so it
                    // can use GCM/HTTP or CCS to send messages to your app.
                    sendRegistrationIdToBackend();

                    saveRegIdToDb();

                    // For this demo: we don't need to send it because the
                    // device will send
                    // upstream messages to a server that echo back the message
                    // using the
                    // 'from' address in the message.

                    // Persist the regID - no need to register again.
                    storeRegistrationId(context, regId);
                } catch (IOException ex) {
                    msg = "Error :" + ex.getMessage();
                    // If there is an error, don't just keep trying to register.
                    // Require the user to click a button again, or perform
                    // exponential back-off.
                }
                return msg;
            }

            @Override
            protected void onPostExecute(String msg) {
                // mDisplay.append(msg + "\n");
            }
        }.execute(null, null, null);
    }

Answer 1

一些基本检查：

• 您的项目是否已被Google列入白名单？
• 您使用正确的sender_id（项目编号）吗？
• 网络连接正常吗？
• 是否安装了Google Play服务并保持最新状态？

上述检查之一不应该没问题。

Answer 2

检查发件人ID，这是项目编号

并启用“API＆amp; auth” - ＆gt; “Google Cloud Messaging for Android”