Firebase FCM强制onTokenRefresh() [英] Firebase FCM force onTokenRefresh() to be called

问题描述

我正在将我的应用程序从GCM迁移到FCM.

I am migrating my app from GCM to FCM.

当新用户安装我的应用程序时，会自动调用onTokenRefresh().问题在于该用户尚未登录(没有用户ID).

When a new user installs my app, the onTokenRefresh() is automatically being called. The problem is that the user is not logged in yet (No user id).

用户登录后如何触发onTokenRefresh()?

推荐答案

无论何时生成新令牌，都将调用onTokenRefresh()方法.安装应用程序后，将立即生成它(如您所知).令牌更改时也会调用它.

The onTokenRefresh() method is going to be called whenever a new token is generated. Upon app install, it will be generated immediately (as you have found to be the case). It will also be called when the token has changed.

根据FirebaseCloudMessaging指南:

您可以将通知定向到单个特定设备.初始时 启动您的应用程序后，FCM SDK会为 客户端应用实例.

You can target notifications to a single, specific device. On initial startup of your app, the FCM SDK generates a registration token for the client app instance.

来源链接: https://firebase.google.com/docs/notifications/android/console -device#access_the_registration_token

这意味着令牌注册是针对每个应用程序的.听起来好像您想在用户登录后使用令牌.我建议您将onTokenRefresh()方法中的令牌保存到内部存储或共享首选项中.然后，在用户登录后从存储中检索令牌，并根据需要在服务器中注册令牌.

This means that the token registration is per app. It sounds like you would like to utilize the token after a user is logged in. What I would suggest is that you save the token in the onTokenRefresh() method to internal storage or shared preferences. Then, retrieve the token from storage after a user logs in and register the token with your server as needed.

如果要手动强制onTokenRefresh()，则可以创建IntentService并删除令牌实例.然后，当您调用getToken时，将再次调用onTokenRefresh()方法.

If you would like to manually force the onTokenRefresh(), you can create an IntentService and delete the token instance. Then, when you call getToken, the onTokenRefresh() method will be called again.

示例代码:

public class DeleteTokenService extends IntentService
{
    public static final String TAG = DeleteTokenService.class.getSimpleName();

    public DeleteTokenService()
    {
        super(TAG);
    }

    @Override
    protected void onHandleIntent(Intent intent)
    {
        try
        {
            // Check for current token
            String originalToken = getTokenFromPrefs();
            Log.d(TAG, "Token before deletion: " + originalToken);

            // Resets Instance ID and revokes all tokens.
            FirebaseInstanceId.getInstance().deleteInstanceId();

            // Clear current saved token
            saveTokenToPrefs("");

            // Check for success of empty token
            String tokenCheck = getTokenFromPrefs();
            Log.d(TAG, "Token deleted. Proof: " + tokenCheck);

            // Now manually call onTokenRefresh()
            Log.d(TAG, "Getting new token");
            FirebaseInstanceId.getInstance().getToken();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }

    private void saveTokenToPrefs(String _token)
    {
        // Access Shared Preferences
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
        SharedPreferences.Editor editor = preferences.edit();

        // Save to SharedPreferences
        editor.putString("registration_id", _token);
        editor.apply();
    }

    private String getTokenFromPrefs()
    {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
        return preferences.getString("registration_id", null);
    }
}

编辑

FirebaseInstanceIdService

公共类FirebaseInstanceIdService扩展了服务

public class FirebaseInstanceIdService extends Service

不推荐使用此类.赞成压倒一切 FirebaseMessagingService中的onNewToken.一旦那已经 实施后，可以安全地删除此服务.

This class is deprecated. In favour of overriding onNewToken in FirebaseMessagingService. Once that has been implemented, this service can be safely removed.

onTokenRefresh()已已弃用.在MyFirebaseMessagingService

onTokenRefresh() is deprecated. Use onNewToken() in MyFirebaseMessagingService

public class MyFirebaseMessagingService extends FirebaseMessagingService {

@Override
public void onNewToken(String s) {
    super.onNewToken(s);
    Log.e("NEW_TOKEN",s);
    }

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);
    }
} 

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