在GoogleCloudMessaging API中，如何处理注册ID的续订或到期？

Question

如问题所述，如何确定何时在GoogleCloudMessaging
API中注册ID无效？我已经阅读了有关类似主题的几个问题的答案：GCM注册ID是否过期？以及Google Coud
Mesaging（GCM）和registration_id到期，我怎么知道？。这些问题的问题在于，答案是使用GCMRegistrar而不是GoogleCloudMessaging
API的旧GCMAPI。前两种方法已贬值。)C2DM

我将 逐步解决我的困惑/问题 ：

1） 在“ 启用GCM
”标题下，第二点是：

Google may periodically refresh the registration ID, so you should design your Android application with the understanding that the com.google.android.c2dm.intent.REGISTRATION intent may be called multiple times. Your Android application needs to be able to respond accordingly.

The registration ID lasts until the Android application explicitly unregisters itself, or until Google refreshes the registration ID for your Android application. Whenever the application receives a com.google.android.c2dm.intent.REGISTRATION intent with a registration_id extra, it should save the ID for future use, pass it to the 3rd-party server to complete the registration, and keep track of whether the server completed the registration. If the server fails to complete the registration, it should try again or unregister from GCM.

2）
现在，如果是这种情况，那么我应该在BroadcastReceiver中处理意图，然后再次发送register（）请求以获取新的注册ID。但是问题在于，在同一页面上标题ERROR_MAIN_THREAD下的
内容是： GCM methods are blocking. You should not run them in the main thread or in broadcast receivers。

3） 我还了解到，注册ID发生更改时，还有其他两种情况（如“
使注册状态保持同步”标题下的“高级主题” 所述）：应用程序更新和备份与还原。我已经在打开应用程序时处理了它们。

4） 在GCMRegistrar
API，内部GCMBaseIntentService，过去有一个回调
onRegistered（）方法中，当设备注册得到其中得到调用。在这里，我曾经保留注册ID并将其发送给第三方服务器。

但是，现在我应该如何处理注册ID的更新或更新，将其保留并发送给第三方服务器？

可能是由于阅读全部内容而使我感到困惑，或者我错过了一些东西。非常感谢您的帮助。

更新资料

即使在Android线程上处理GoogleCloudMessaging中的注册ID更改时，也没有提及如何处理Google定期刷新ID？

Answer 1

我正在给出一种方法，就像我在应用程序中实现的一样

@Override
protected void onRegistered(Context context, String registrationId) {
     Log.i(TAG, "Device registered: regId = " + registrationId);
     //displayMessage(context, getString(R.string.gcm_registered));
     //ServerUtilities.register(context, registrationId);
     //1. Store this id to application Prefs on each request of device registration
     //2. Clear this id from app prefs on each request of device un-registration  
     //3. Now add an if check for new registartion id to server, you can write a method on server side to check if this reg-id matching for this device or not (and you need an unique identification of device to be stored on server)
     //4. That method will clear that if id is matching it meanse this is existing reg-id, and if not matching this is updated reg-id.
     //5. If this is updated reg-id, update on server and update into application prefs.
}

你也可以这样

if reg_id exists_into prefrences then
    if stored_id equals_to new_reg_id then
        do nothing
    else
        say server to reg_id updated
        update prefrences with new id
    end if
else
    update this id to application prefs
    say server that your device is registered
end if

但是，当用户清除应用程序数据并且您将丢失当前的注册表ID时，就会出现问题。

新API示例示例的更新
功劳归功于Eran及其Android上的Google
Cloud Messaging中的)他的答案处理注册ID更改

Google更改了其演示应用程序以使用新界面。他们通过在应用程序本地保留的值上设置过期日期来刷新注册ID。应用启动时，他们会加载其本地存储的注册ID。如果它已“过期”（在演示中这意味着它是7天前从GCM收到的），他们会gcm.register(senderID)再次致电。

这不适用于假设的情况，在这种情况下，Google会为长时间未启动的应用刷新注册ID。在这种情况下，应用程序将不会知道更改，第三方服务器也不会。

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);
    mDisplay = (TextView) findViewById(R.id.display);

    context = getApplicationContext();
    regid = getRegistrationId(context);

    if (regid.length() == 0) {
        registerBackground();
    }
    gcm = GoogleCloudMessaging.getInstance(this);
}

/**
 * Gets the current registration id for application on GCM service.
 * <p>
 * If result is empty, the registration has failed.
 *
 * @return registration id, or empty string if the registration is not
 *         complete.
 */
private String getRegistrationId(Context context) {
    final SharedPreferences prefs = getGCMPreferences(context);
    String registrationId = prefs.getString(PROPERTY_REG_ID, "");
    if (registrationId.length() == 0) {
        Log.v(TAG, "Registration not found.");
        return "";
    }
    // check if app was updated; if so, it must clear registration id to
    // avoid a race condition if GCM sends a message
    int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE);
    int currentVersion = getAppVersion(context);
    if (registeredVersion != currentVersion || isRegistrationExpired()) {
        Log.v(TAG, "App version changed or registration expired.");
        return "";
    }
    return registrationId;
}

/**
 * Checks if the registration has expired.
 *
 * <p>To avoid the scenario where the device sends the registration to the
 * server but the server loses it, the app developer may choose to re-register
 * after REGISTRATION_EXPIRY_TIME_MS.
 *
 * @return true if the registration has expired.
 */
private boolean isRegistrationExpired() {
    final SharedPreferences prefs = getGCMPreferences(context);
    // checks if the information is not stale
    long expirationTime =
            prefs.getLong(PROPERTY_ON_SERVER_EXPIRATION_TIME, -1);
    return System.currentTimeMillis() > expirationTime;
}