在message.builder中，builder()显示未解决的参考

Question

我正在使用FCM从我的Android应用发送通知，并且我已经实现了它问我的所有库。

            val topic = "highScores"
// See documentation on defining a message payload.
            val message = Message.builder()
                    .putData("score", "850")
                    .putData("time", "2:45")
                    .setTopic(topic)
                    .build()
// Send a message to the devices subscribed to the provided topic.
            val response = FirebaseMessaging.getInstance().send(message)
// Response is a message ID string.
            println("Successfully sent message: " + response)

我正在使用此代码发送通知，但建筑商显示未解决。

Answer 1

将其添加到您的依赖项

implementation 'com.google.firebase:firebase-admin:6.9.0'

并确保您导入正确的消息类，wich是

import com.google.firebase.messaging.Message

Answer 2

使用remotemessage

RemoteMessage message = new RemoteMessage.Builder(getRegistrationToken())
                .setMessageId(incrementIdAndGet())
                .addData("message", "Hello")
                .build();
FirebaseMessaging.getInstance().send(message);