消息推送系统

// 在Android端初始化FCM

public class MyApplication extends Application {

@Override

public void onCreate() {

super.onCreate();

FirebaseMessaging.getInstance().subscribeToTopic("all");

}

}

// 使用Node.js发送消息

const admin = require('firebase-admin');

var serviceAccount = require('./path/to/serviceAccountKey.json');

admin.initializeApp({

credential: admin.credential.cert(serviceAccount),

databaseURL: 'https://your-app.firebaseio.com'

});

const message = {

topic: 'all',

notification: {

title: 'Hello',

body: 'This is a test message.'

}

};

admin.messaging().send(message)

.then((response) => {

console.log('Successfully sent message:', response);

})

.catch((error) => {

console.log('Error sending message:', error);

});