如何使用 FCM 在 android 中配置令牌到令牌通知？

Question

我正在尝试在 android 中使用 FCM 找出用户对用户的通知调用， 我有一个 "subscribeToTopic("TOPIC Name")" 的示例，但除此之外，我无法弄清楚如何使用 FCM 中用户的令牌 ID 将用户应用于用户通知。 我指的是本教程 https://blog.usejournal.com/send-device-to-device-push-notifications-without-server-side-code-238611c143

请帮忙，提前致谢

btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                TOPIC = "/topics/userABC"; //topic must match with what the receiver subscribed to
                NOTIFICATION_TITLE = edtTitle.getText().toString();
                NOTIFICATION_MESSAGE = edtMessage.getText().toString();

                JSONObject notification = new JSONObject();
                JSONObject notifcationBody = new JSONObject();
                try {
                    notifcationBody.put("title", NOTIFICATION_TITLE);
                    notifcationBody.put("message", NOTIFICATION_MESSAGE);

                    notification.put("to", TOPIC);
                    notification.put("data", notifcationBody);
                } catch (JSONException e) {
                    Log.e(TAG, "onCreate: " + e.getMessage() );
                }
                sendNotification(notification);
            }
        });

btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                TOPIC = "/topics/userABC"; //topic must match with what the receiver subscribed to
                NOTIFICATION_TITLE = edtTitle.getText().toString();
                NOTIFICATION_MESSAGE = edtMessage.getText().toString();

                JSONObject notification = new JSONObject();
                JSONObject notifcationBody = new JSONObject();
                try {
                    notifcationBody.put("title", NOTIFICATION_TITLE);
                    notifcationBody.put("message", NOTIFICATION_MESSAGE);

                    notification.put("to", TOPIC);
                    notification.put("data", notifcationBody);
                } catch (JSONException e) {
                    Log.e(TAG, "onCreate: " + e.getMessage() );
                }
                sendNotification(notification);
            }
        });

Answer 1

使用这种JSON格式向特定设备发送通知。

{ "notification": {
    "title": "Title Message",
    "text": "Message here"
  },
  "to" : "YOUR_TARGET_device_token_id"
}