如何将firebase的消息显示到TextView Android Studio？

import com.google.firebase.messaging.FirebaseMessaging;
import com.google.firebase.messaging.RemoteMessage;

// ...

// 获取Firebase消息
FirebaseMessaging.getInstance().subscribeToTopic("topic_name").addOnCompleteListener(task -> {
    if (task.isSuccessful()) {
        // 订阅成功
    } else {
        // 订阅失败
    }
});

// 处理Firebase消息
FirebaseMessaging.getInstance().setMessageHandler(remoteMessage -> {
    if (remoteMessage.getData().size() > 0) {
        // 获取消息数据
        String message = remoteMessage.getData().get("message");

        // 在TextView中显示消息
        TextView messageTextView = findViewById(R.id.messageTextView);
        messageTextView.setText(message);
    }
});