FCM 的存储令牌

Question

我正在尝试将令牌存储在云数据库中。我稍后将在云函数中使用此令牌，以便向已添加为好友的用户发送通知。

但是，推送设备令牌不起作用，因为用户未经授权。他们获得授权后我无法保存它，因为令牌是在安装应用程序时生成的。

 private static final String TAG = "FirebaseIDService";
    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.d(TAG, "Refreshed token: " + refreshedToken);
        // TODO: Implement this method to send any registration to your app's servers.
        sendRegistrationToServer(refreshedToken);
    }
    /**
     * Persist token to third-party servers.
     *
     * Modify this method to associate the user's FCM InstanceID token with any server-side account
     * maintained by your application.
     *
     * @param token The new token.
     */
    private void sendRegistrationToServer(String token) {
        // Add custom implementation, as needed.
        FirebaseDatabase mFirebaseDatabase = FirebaseDatabase.getInstance();
        DatabaseReference deviceToken = mFirebaseDatabase.getReference("device_token");
        deviceToken.push().setValue(token).addOnCompleteListener(task -> {
            if (task.isSuccessful()) {
                Log.i("token push","Success!");
            } else {
                Log.i("token push","Failed !");
            }
        });
    }

Answer 1

将令牌保存在共享首选项中，成功登录后将令牌保存到 Firebase 数据库，请记住，如果您移除应用缓存或重新安装应用，令牌始终不同