Question

您好我在使用firebase构建聊天应用程序，我想在用户使用FCM向其他用户发送消息时推送通知。请帮忙

Answer 1

将compile 'com.google.firebase:firebase-messaging:11.8.0'添加到您的app/build.gradle文件中。以下代码到AndroidManifest.xml

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

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

MyFirebaseMessagingService.java

public class MyFirebaseMessagingService extends FirebaseMessagingService {

   private static final String TAG = "MyFMService";

   @Override
   public void onMessageReceived(RemoteMessage remoteMessage) {
       // Handle data payload of FCM messages.
       Log.d(TAG, "FCM Message Id: " + remoteMessage.getMessageId());
       Log.d(TAG, "FCM Notification Message: " +
               remoteMessage.getNotification());
       Log.d(TAG, "FCM Data Message: " + remoteMessage.getData());
   }
}

MyFirebaseInstanceIdService.java

public class MyFirebaseInstanceIdService extends FirebaseInstanceIdService {

   private static final String TAG = "MyFirebaseIIDService";
   private static final String FRIENDLY_ENGAGE_TOPIC = "friendly_engage";

   /**
    * The Application's current Instance ID token is no longer valid 
    * and thus a new one must be requested.
    */
   @Override
   public void onTokenRefresh() {
       // If you need to handle the generation of a token, initially or
       // after a refresh this is where you should do that.
       String token = FirebaseInstanceId.getInstance().getToken();
       Log.d(TAG, "FCM Token: " + token);

       // Once a token is generated, we subscribe to topic.
       FirebaseMessaging.getInstance()
               .subscribeToTopic(FRIENDLY_ENGAGE_TOPIC);
   }
}

希望这会对你有所帮助

在与fcm的聊天中接收通知

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