当app在前台时发送推送通知

上下观古今，起伏千万途。这篇文章主要讲述当app在前台时发送推送通知相关的知识，希望能为你提供帮助。
即使应用程序在后台，我如何发送推送通知？我有一个android应用程序，它接收来自服务器的推送通知，当应用程序在后台时它不会发送。它仅在应用程序处于后台时发送。
答案您需要在清单文件中添加：

< service android:name=".name_of_your_firebase_instace_service" android:exported="false"> < intent-filter> < action android:name="com.google.firebase.INSTANCE_ID_EVENT" /> < /intent-filter> < /service> < service android:name=".nname_of_your_firebase_messaging_service android:exported="false"> < intent-filter> < action android:name="com.google.firebase.MESSAGING_EVENT" /> < /intent-filter> < /service>

这是用于刷新令牌的类（实例服务）

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService { private static final String TAG = MyFirebaseInstanceIDService.class.getSimpleName(); @Override public void onTokenRefresh() { super.onTokenRefresh(); String refreshedToken = FirebaseInstanceId.getInstance().getToken(); // sending reg id to your server sendRegistrationToServer(refreshedToken); Log.d("NewToken",refreshedToken); }private void sendRegistrationToServer(final String token) { // sending gcm token to server Log.e(TAG, "sendRegistrationToServer: " + token); } }

消息服务，您将收到消息/通知

public class MyFirebaseMessagingService extends FirebaseMessagingService {private static final String TAG = MyFirebaseMessagingService.class.getSimpleName(); private NotificationUtils notificationUtils; @Override public void onMessageReceived(RemoteMessage remoteMessage) { Log.e(TAG, "From: " + remoteMessage.getFrom()); if (remoteMessage == null) return; // Check if message contains a notification payload.// Check if message contains a data payload. if (remoteMessage.getData().size() > 0) { Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString()); //you can send your own custom notification here if you are sending notification in data tag or if you are sending notification with "notification tag" it will handle it automatically} } }

【当app在前台时发送推送通知】注意：不要忘记在项目的app文件夹中添加google-service.json文件