对不起这个noob问题,我是

android开发的新手.我目前正在开发一个项目,需要向安装了我的应用程序的

Android设备发送推送通知.我已经按照firebase的快速入门教程完成了这项工作,并在我的设备上成功收到了通知.

问题：如何检索服务器发送的消息并将该消息显示给我的Android Activity？提前致谢.

继承我的代码. MainActivity.java

public class MainActivity extends AppCompatActivity {

TextView textView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

TextView tv = (TextView) findViewById(R.id.tv);

/*

* Get the data from push notification and display it in TextView

* */

tv.setText("Message retrieve from Push Notification");

}

这是我的MyFirebaseMessagingService.java

@Override

public void onMessageReceived(RemoteMessage remoteMessage) {

sendNotification(remoteMessage.getNotification().getBody());

}

//This method is only generating push notification

//It is same as we did in earlier posts

public void sendNotification(String messageBody) {

Intent intent = new Intent(this, MainActivity.class);

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,

PendingIntent.FLAG_ONE_SHOT);

Intent notificationIntent = new Intent(this, MainActivity.class);

notificationIntent.putExtra("message", messageBody);

// set intent so it does not start a new activity

notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |

Intent.FLAG_ACTIVITY_SINGLE_TOP);

Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)

.setSmallIcon(R.mipmap.ic_launcher)

.setContentTitle("Peoplelink Push Notification")

.setContentText(messageBody)

.setAutoCancel(true)

.setSound(defaultSoundUri)

.setContentIntent(pendingIntent);

NotificationManager notificationManager =

(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

notificationManager.notify(0, notificationBuilder.build());

}